Official Rythmik Audio Subwoofer thread - Page 1033 - AVS Forum | Home Theater Discussions And Reviews
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post #30961 of 42351 Old 10-28-2017, 09:51 AM
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Originally Posted by Timothy1180 View Post
I didnt mean to be rude or say fv18 is lacking in anything. Looks like a great sub and an amazing option for many. I just dont chase after subsonic bass. I really like the 20-60hz range with a lot of output. Im really excited to upgrade to some new rythmik subs and Im patiently waiting on our move. The fv25hp might be the obvious step up from dual fv15hp. Especially since Im not a fan of bass that rattles the room.

Brian has always been a stand up guy to me! Other companies get praised for their customer service but I think Brian is just as good as any or better!!!
No problem Tim. Thanks for the kind words. Josh also made a comment saying the driver in FV25HP is more efficient (in his words, lower Q value). So I wanted to answer a more general question.

The distortion mechanism in the driver is like this. All components of distortion come from a voltage component in the back EMF of the driver when it driven by an external voltage source and that back EMF distortion voltage source has the same response curve as that of the external voltage source that is driving the speaker driver. So if have a subwoofer with higher efficiency above the 30hz range, the distortion components are amplified accordingly, and therefore higher distortion. This behavior takes place even when it is at low playback level. While this is based on modelling, the distortion number of F18 indeed collaborates the model.

Distortion characteristics/mechanism is hard to explain in just one or two sentences. For instance, when we see a distortion of say 10%, does that mean the strength of the fundamental component is still unchanged? The answer is it depends. Now if say the fundamental component has also increased by 10%, is the distortion still at 10%? That is why I have been advocating that the compression curve is also important to gaude the coherence of the bass sound. Some of us already know BL curve is the major source of nonliearity of distortion and the BL curve tends to drop at excursion extremes as if the magnet has become smaller. So the natural conclusion is when the BL value is nonlinear, it is always "compression", or reduced output than otherwise. But at certain frequency points, a weaker BL value actually makes the cone move fast and that is opposite of "compression". The result is some simply described or perceived as the cone losing control.


So a lot of things can cannot be explained just with numbers and you know that numbers just open up more questions.

Last edited by Rythmik; 10-28-2017 at 10:18 AM.
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post #30962 of 42351 Old 10-28-2017, 10:00 AM
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Originally Posted by Timothy1180 View Post
The fv25hp might be the obvious step up from dual fv15hp. Especially since Im not a fan of bass that rattles the room.
From 16hz and above the 25hp CEA max passing db is about 6db over the 15hp in 1 port mode and more than that at 12.5hz and below. So 1 FV25HP ~ 2 FV15HPs or a bit more as expected. However, the FV25HP has lower THD overall from 10-125hz. If you like chest punch, you should add one or two MBM’s (there is a long thread about MBM here at AVS) on top of the Rythmik then you have bass nirvana thru out the entire bass/ultra bass bandwidth.

Last edited by tvuong; 10-28-2017 at 12:55 PM.
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post #30963 of 42351 Old 10-28-2017, 10:02 AM
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Anyone watch the new Annabelle movie and get shocked by how loud (and room shaking) that first peak was when the car accident occurs? Shocked me.

Samsung 55" MU8000
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post #30964 of 42351 Old 10-28-2017, 11:39 AM
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Originally Posted by Rythmik View Post
E15HP2 is the best we can squeeze out from a compact 15" model. It has about 1db to 1.5db less output than F18.
Hi Brian & Enrico,

I’m still within the 45 day period on my E15HP. Is the model 2 the exact same size? Will you comment on the power draw—E15HP vs. E15HP2—when no sound is playing? Also, the new model in piano gloss is back ordered. How would that work with a return? Would I need to send mine back now and wait for it to come in stock?

I’m not really a product return kind of guy, but mitigating the compromises I made for size is just too compelling. Anyone in the SF Bay Area interested in a deal on a month old piano gloss E15HP?

Cheers,
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post #30965 of 42351 Old 10-28-2017, 01:51 PM
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i wish rythmik had a trade-up program (i think svs does?). i'd probably trade my 15's for a pair of 18's or the fv25. selling them privately is such a hassle because of their size. pretty much local pickup only.


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post #30966 of 42351 Old 10-28-2017, 02:13 PM
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Originally Posted by Bond 007 View Post
You're a troublemaker. You will vibrate that new room to pieces.
My subwoofer in my OKC house was a Hsu VTF-3 MK3 Turbo. It was an excellent sub but wasn't in the same world as one of my FV18s. My Hsu stood on a suspended floor and there was a china cabinet at one end of the room. Not surprisingly, really deep bass would make all the glass and china shake, rattle, and roll. That was fun too. What can I say? Ground shaking LFE keeps me young, or young at heart anyway.

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post #30967 of 42351 Old 10-28-2017, 02:20 PM
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Originally Posted by PlasmaPZ80U View Post
Anyone watch the new Annabelle movie and get shocked by how loud (and room shaking) that first peak was when the car accident occurs? Shocked me.
Is Annabelle: Creation worth buying? When I read your post I checked the Kaleidescape store for availability and learned that it is available in HDR with TrueHD Atmos audio. If the audio is as good as you report, I'm tempted to buy it and download it to my Kscape Strato. I love Atmos effects almost as much as great LFE.

HT setup: Sony 75XBR X940D UHD HDR TV; Kaleidescape Strato Movie Server 6 TB and Terra Server 24 TB; Yamaha RX-A3060 AV receiver; Sonamp 2-1 2channel 100W power amp; Crestron Control System; 2 Rythmik FV18 subwoofers, 6 Hsu HB-1 Bookshelf speakers, 1 Hsu HC-1 Center speaker, 4 Focal ICW8 in-ceiling Atmos speakers; Oppo UDP-203 4K HDR BD player. TiVO Bolt 1TB DVR; TiVo Premiere Elite 2 TB DVR; Roku Premiere+; Apple TV 4K
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post #30968 of 42351 Old 10-28-2017, 04:06 PM
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Originally Posted by gwsat View Post
Quote:
Originally Posted by PlasmaPZ80U View Post
Anyone watch the new Annabelle movie and get shocked by how loud (and room shaking) that first peak was when the car accident occurs? Shocked me.
Is Annabelle: Creation worth buying? When I read your post I checked the Kaleidescape store for availability and learned that it is available in HDR with TrueHD Atmos audio. If the audio is as good as you report, I'm tempted to buy it and download it to my Kscape Strato. I love Atmos effects almost as much as great LFE.
Yeah, the bass is very good. I had to turn my sub down in the AVR to keep the room from shaking obviously. The first loud scene was when Annebelle gets hit by a fast moving car and it conveyed all the force/violence of such an accident and at my normal subs levels it was overwhelming.
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post #30969 of 42351 Old 10-29-2017, 04:35 PM
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Hello, I am in the market for a sub. I am considering the below list of subs. My room is 3500 cubic feet that opens up to my kitchen and dining room. Primary use will be Home Theater and very little music. I only have room for one sub or two smaller subs (smaller being much smaller than anything on below list ) due to the room layout. I can’t do the huge dual driver subs due to WAF.

My question: - The Rythmik subs and servo technology seem interesting, and I am not trying to troll but are they a gimmick? If not… is there any reason why I should be considering anything other than this technology? As you can see from my list below Rytmik seems to neither be the most expensive nor cheapest that made my list… Why should I go with let’s say a Rythmik FV15HP over the HSU VTF-3 MK5 for 50% more ($446)… will it give me an extra 50% in performance?

Thanks for any comments, thoughts, and recommendations!

HSU VTF-3 MK5 - 25Hx17.25Wx24.5D - 600W- 17Hz - 85lbs - $892 shipped
Rythmik FVX15 - 24Hx18Wx24D - 400W - 12Hz? - ~100lbs? - $999 Shipped
HSU VTF-15H MK2 - 25Hx18Wx28D - 600W - 16Hz - 110lbs - $1028 shipped
PSA V1500 - 25Hx17Wx24D - 725W - 16Hz? - 86lbs - $1099 shipped
Rythmik FV15HP - 24Hx18Wx24D – 600W – 14Hz? - ~100lbs? - $1338 Shipped
PSA V1801 – 24Hx20Wx22D – 725W – 16Hz? – 108lbs - $1399 shipped

Display: LG OLED65C7P 65-Inch | AVR: Denon AVR-X3300W
Speakers Klipsch: Front: RP-260F Atmos: RP-140S, Center RP-450C, Rear: R-15M | SUB: Rythmik FV15HP
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post #30970 of 42351 Old 10-29-2017, 04:59 PM
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Originally Posted by terminaldawn View Post
Hello, I am in the market for a sub. I am considering the below list of subs. My room is 3500 cubic feet that opens up to my kitchen and dining room. Primary use will be Home Theater and very little music. I only have room for one sub or two smaller subs (smaller being much smaller than anything on below list ) due to the room layout. I can’t do the huge dual driver subs due to WAF.



My question: - The Rythmik subs and servo technology seem interesting, and I am not trying to troll but are they a gimmick? If not… is there any reason why I should be considering anything other than this technology? As you can see from my list below Rytmik seems to neither be the most expensive nor cheapest that made my list… Why should I go with let’s say a Rythmik FV15HP over the HSU VTF-3 MK5 for 50% more ($446)… will it give me an extra 50% in performance?



Thanks for any comments, thoughts, and recommendations!



HSU VTF-3 MK5 - 25Hx17.25Wx24.5D - 600W- 17Hz - 85lbs - $892 shipped

Rythmik FVX15 - 24Hx18Wx24D - 400W - 12Hz? - ~100lbs? - $999 Shipped

HSU VTF-15H MK2 - 25Hx18Wx28D - 600W - 16Hz - 110lbs - $1028 shipped

PSA V1500 - 25Hx17Wx24D - 725W - 16Hz? - 86lbs - $1099 shipped

Rythmik FV15HP - 24Hx18Wx24D – 600W – 14Hz? - ~100lbs? - $1338 Shipped

PSA V1801 – 24Hx20Wx22D – 725W – 16Hz? – 108lbs - $1399 shipped


There have been many comparisons done between these subs. Suggest you search the forum for them. The FV15HP and V1801 would be my choice. The Rythmik gives more edge lower while PSA up top. Depends on your listening preferences.


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Subwoofers: Dual Rythmik FV18s Rev2 with Paper cone, BOSS Platform mini riser, 2 BK LFE
Speakers: PSA MTM-210 L/C/R - Klipsch 250S Surrounds, PSA MT 110sr Rear Surrounds, 4 x SVS Prime Elevation for Atmos
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post #30971 of 42351 Old 10-29-2017, 05:23 PM
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There have been many comparisons done between these subs. Suggest you search the forum for them. The FV15HP and V1801 would be my choice. The Rythmik gives more edge lower while PSA up top. Depends on your listening preferences.


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I have, and I have read them. My specific questions have not been answered or I would not be asking I know value is subjective but still hoping to drive up conversation that will help to make a sound purchase. Also the servo tech is really what I want to know about. Is that amazing? Thanks for your help!!
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post #30972 of 42351 Old 10-29-2017, 05:36 PM
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Originally Posted by Timothy1180 View Post
Recently did a full demo in room of dual jtr cap 4000 and I easily preferred my 2 fv15hp and 2 Psa xv30fse over the jtr. Jtr was lacking that chest slam and room shake. But 4 vs 2 is never fair.
I'd love to hear more of your thoughts/comments on the demo.

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post #30973 of 42351 Old 10-29-2017, 05:42 PM
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all subs gonna sound different in different sized rooms...for open space areas you have to go big.
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post #30974 of 42351 Old 10-29-2017, 05:44 PM
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My take on the servo tech is less distortion, particularly when playing loud. So if you really like to push a subwoofer and still get clean bass, it might be well worth spending an extra $500.

I don't play that loud myself and I only have two baby Rythmiks (F8's) and thus I am not really the person to turn to for a testimonial, but I have definitely been happy with the F8's for both music and home theater.
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post #30975 of 42351 Old 10-29-2017, 05:56 PM
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i bet most people that have rythmiks dont crank up the gain and run them too much higher than what audyssey sets em at...but they can take it

Power: Marantz sr7008, NAD C 275Bee x 2, Video: Oppo 103, Samsung 75un6300 LG oled c9 77
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post #30976 of 42351 Old 10-29-2017, 05:56 PM
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Originally Posted by terminaldawn View Post
I have, and I have read them. My specific questions have not been answered or I would not be asking I know value is subjective but still hoping to drive up conversation that will help to make a sound purchase. Also the servo tech is really what I want to know about. Is that amazing? Thanks for your help!!


Rythmik subs play real clean, like sealed subs. You wild not go wrong with either the Rythmik or PSA. It will depend a lot on your room and how you listen. For more chest thump type bass go with PSA. If you value deep bass more then Rythmik FV15HP is your best choice. The Rythmik servo controlled subs offer the lowest distortion. Some folks prefer distortion to some extent as it adds to the explosion scene for example. Its really very hard to tell what sub you would like on your room. Just know that they are both solid choices.

Sorry for replying continually to your posts. I went through a similar journey and the way I solved is that I got the subs in my room and listened. I was surprised by what looked good on paper was nowhere close to what sounded good in my room to me.


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Subwoofers: Dual Rythmik FV18s Rev2 with Paper cone, BOSS Platform mini riser, 2 BK LFE
Speakers: PSA MTM-210 L/C/R - Klipsch 250S Surrounds, PSA MT 110sr Rear Surrounds, 4 x SVS Prime Elevation for Atmos
Video: Epson PowerLite Home Cinema 6500 UB; Room: 2100 cuft sealed on suspended floor
Receiver & Players: Denon X4400H, Oppo UDP-203, Roku Ultra. Apple TV, Minidsp 2X4 HD
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post #30977 of 42351 Old 10-29-2017, 06:17 PM
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like i mentioned earlier, if you dont care for the clean sound of bass, you can crank them up.

Power: Marantz sr7008, NAD C 275Bee x 2, Video: Oppo 103, Samsung 75un6300 LG oled c9 77
Speakers: Focal aria 948, Focal cc900, Klipsch synergy KSF 10.5, Magnepan LRS, Audioengine A2+
Subs: Rythmik FV25HP, Rythmik FV15HP, Velodyne HGS 12, Velodyne VA1512
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post #30978 of 42351 Old 10-29-2017, 07:32 PM
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Quote:
Originally Posted by terminaldawn View Post
Hello, I am in the market for a sub.

My question: - The Rythmik subs and servo technology seem interesting, and I am not trying to troll but are they a gimmick? If not… is there any reason why I should be considering anything other than this technology?

I have not listened to the other subs but can comment on servo technology. It is not a gimmick; it is feedback that reduces the distortion and allows a sub to play a little deeper and louder all things equal. BUT, all things are never equal, and since subwoofers are at such low frequencies it is hard to hear the difference. And in fact you can achieve similar performance by other techniques, like larger amplifiers and drivers with greater excursion and linearity. Some things, like compensating thermal distortion and very high damping for reduced cone ringing in the time domain, are hard if not impossible to achieve without servo (feedback) technology. Feedback in an amplifier results in lower distortion and reduced output impedance to better drive your speakers; servo in a subwoofer works much the same.

So, there are many great subs these days, and only a few use some sort of servo design (Rythmik, Velodyne, some Paradigm, etc.) Not all servo circuits work the same but the end goal is the same -- better performance. If otherwise comparable I would go for the servo design, and although it would (and did) influence my decision, it would not be the only factor.

FWIWFM - Don
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post #30979 of 42351 Old 10-29-2017, 09:55 PM
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Originally Posted by terminaldawn View Post
The Rythmik subs and servo technology seem interesting, and I am not trying to troll but are they a gimmick? If not… is there any reason why I should be considering anything other than this technology? … will it give me an extra 50% in performance?
Perhaps the clearest testimonial I've seen by a Rythmik sub owner that really helped me grasp the advantages of the servo technology was this:

"I've auditioned and owned many different subwoofers. The better subs do a good job of adding the lowest octaves of sound, so one can instantly notice when they are turned on. The F25 Rythmik Audio subwoofer is significantly different (from every other sub I've heard). The F25 is completely transparent and does not "sound" like a sub at all. The F25 quite simply improves the sound of your main speakers (and my main speakers are +- 1 dB down to 36 Hz.)

I've never heard recorded low-frequency sound this clearly or cleanly whether it be an organ, the lowest notes on a grand piano, bass guitar, or the bass sounds in a well-recorded movie. For music, I can hear the articulation of low frequencies clearly and distinctly without being overbearing or sounding soft/slow/muddy. For movies, I can feel the power and emotion the Director intended for the audience to hear - and experience.

What I wanted was bass that was authentic, not overpowering, that was fast, hard and responsive. The F25 delivers these qualities effortlessly!

Your initial listening session may at first seem underwhelming because it takes a little time to 'unlearn' years of listening to traditional subwoofers. My advice, listen to some of the best recorded most dynamic uncompressed music you own, and the difference between this subwoofer and every other one you have heard before will become obvious."


So, to answer your questions directly, is the servo technology a gimmick? No, it's not a gimmick, it makes a real improvement. Will it give you an extra 50% in performance? If you're asking for 50% greater Sound Pressure Levels and 50% deeper bass frequency response, that's expecting more than any sub made by any manufacturer is going to offer, when comparisons are being made between subs in the same price range. The Rythmik subs have plenty of depth and power, but it is accurate, detailed, and lower-distortion bass response without bloat. Will that make a significant difference to you? It depends on what you ultimately want. All the models you are considering are excellent subwoofers, and you won't go wrong no matter which you choose. I tend to think of the Rythmik subwoofers as audiophile subs that can blend seamlessly with the loudspeakers you already own. In that respect they may even offer a better Spouse Approval Factor, because at moderate volume levels they won't pummel into submission innocent listeners who aren't big fans of monster bass (or distortion) yet you can certainly crank them up to room-quaking output, when that's what you desire.

I don't know if this makes your decision any easier, but these are the qualities that made me decide in favor of Rythmik subs.

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post #30980 of 42351 Old 10-30-2017, 06:58 AM
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....

So, to answer your questions directly, is the servo technology a gimmick? No, it's not a gimmick, it makes a real improvement. Will it give you an extra 50% in performance? If you're asking for 50% greater Sound Pressure Levels and 50% deeper bass frequency response, that's expecting more than any sub made by any manufacturer is going to offer, when comparisons are being made between subs in the same price range. The Rythmik subs have plenty of depth and power, but it is accurate, detailed, and lower-distortion bass response without bloat. Will that make a significant difference to you? It depends on what you ultimately want. All the models you are considering are excellent subwoofers, and you won't go wrong no matter which you choose. I tend to think of the Rythmik subwoofers as audiophile subs that can blend seamlessly with the loudspeakers you already own. In that respect they may even offer a better Spouse Approval Factor, because at moderate volume levels they won't pummel into submission innocent listeners who aren't big fans of monster bass (or distortion) yet you can certainly crank them up to room-quaking output, when that's what you desire.

I don't know if this makes your decision any easier, but these are the qualities that made me decide in favor of Rythmik subs.
As an owner of two FV15HPs, I can also attest to this. These subs are great at what they do. They sound great at all volumes. Like any sub, spending some time to set them up for success by placing them in the most ideal location available in your room and running some calibration on them is worth it. The effect these subs produce is truly amazing. I have a very large open first floor where these subs reside and they easily handle the volume. One of my favorite demo scenes for this is the fish tank tapping scene from Finding Nemo. You feel (not hear) like you are in that tank of water with someone pounding on the glass. It's incredible.
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| 7.2.4 Photos (Updated Photos 1/5) | Frequency Response | Visual: LG 65” B7A OLED | Elite VMAX-2 Electric 120" | Optoma GT1080 Proj |
| AVR/Amps: Marantz SR-6011 9C | Audio Source AMP-100VS | iNuke 1000DSP; TTs: 4x AuraSound Pro |
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| Front/Rear Heights: 4x Polk T15 | In-Ceiling: 2x Micca M-8C | Subs: 2x Rythmik FV15HP |
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post #30981 of 42351 Old 10-30-2017, 07:33 AM
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Hello, I am in the market for a sub. I am considering the below list of subs. My room is 3500 cubic feet that opens up to my kitchen and dining room. Primary use will be Home Theater and very little music. I only have room for one sub or two smaller subs (smaller being much smaller than anything on below list [IMG class=inlineimg]https://www.avsforum.com//forum/images/smilies/smile.gif[/IMG] ) due to the room layout. I can?t do the huge dual driver subs due to WAF.

My question: - The Rythmik subs and servo technology seem interesting, and I am not trying to troll but are they a gimmick? If not? is there any reason why I should be considering anything other than this technology? As you can see from my list below Rytmik seems to neither be the most expensive nor cheapest that made my list? Why should I go with let?s say a Rythmik FV15HP over the HSU VTF-3 MK5 for 50% more ($446)? will it give me an extra 50% in performance?

Thanks for any comments, thoughts, and recommendations!

HSU VTF-3 MK5 - 25Hx17.25Wx24.5D - 600W- 17Hz - 85lbs - $892 shipped
Rythmik FVX15 - 24Hx18Wx24D - 400W - 12Hz? - ~100lbs? - $999 Shipped
HSU VTF-15H MK2 - 25Hx18Wx28D - 600W - 16Hz - 110lbs - $1028 shipped
PSA V1500 - 25Hx17Wx24D - 725W - 16Hz? - 86lbs - $1099 shipped
Rythmik FV15HP - 24Hx18Wx24D ? 600W ? 14Hz? - ~100lbs? - $1338 Shipped
PSA V1801 ? 24Hx20Wx22D ? 725W ? 16Hz? ? 108lbs - $1399 shipped
I only have a single Rythmik LV12R, a 12 inch rear ported model. However, the sound quality, output and extension it provides for under $600 still puts a smile on my face every time I listen to music, watch a good movie, or play video games. Like others have mentioned it doesn't sound like a subwoofer in the sense that it blends seamlessly with the speakers, making the speakers sound like they are much bigger and deeper extending. The only time that illusion can be shattered is when you crank the sub way up and have it close enough you can feeling it shaking everything near you and you know there is no way your speakers could ever play that low that loud and clear. But when you set it up right, it becomes one with the speakers effortlessly.
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Samsung 55" MU8000
Yamaha RX-A2070
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post #30982 of 42351 Old 10-30-2017, 07:37 AM
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What do you guys think makes more difference, servo control, or room correction? I'm demoing some subs, and I find that some sub's own room correction helps very significantly before Audyssey XT, especially because the calibration distances are better suited to large wavelengths. Unfortunately, the Rythmik's would be hard to demo, return shipping on 100lbs of gear? If only I could borrow one for a day around here...

Denon AVR-X4300H, Paradigm Prestige 15B+45C, Onkyo SKH-410 x4, Rythmik F12SE x2, M-Audio SBX10
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post #30983 of 42351 Old 10-30-2017, 07:46 AM
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Originally Posted by davatar View Post
What do you guys think makes more difference, servo control, or room correction? I'm demoing some subs, and I find that some sub's own room correction helps very significantly before Audyssey XT, especially because the calibration distances are better suited to large wavelengths. Unfortunately, the Rythmik's would be hard to demo, return shipping on 100lbs of gear? If only I could borrow one for a day around here...
Rythmik subs, especially the larger models with the larger amps are known for above average on-amp controls. Many of those controls are not necessary if you use the LFE in and use a processor or AV Receiver. If you use an processor or AVR with some of the industries even better calibration software like Dirac Live or Audyssey XT32 (to name a couple), you'd be surprised how well these subwoofers, with their Servo technology, blend into your system and sound. I didn't directly answer your question because I think these technologies aren't competing, but supplemental to one another. If I had to chose one over the other, I would choose the calibration tech since it can effectively mitigate entire frequency drop outs or peaks which I believe has a greater overall advantage to sound correction than the lower distortion Direct Servo supplies. Just one man's opinion.
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| 7.2.4 Photos (Updated Photos 1/5) | Frequency Response | Visual: LG 65” B7A OLED | Elite VMAX-2 Electric 120" | Optoma GT1080 Proj |
| AVR/Amps: Marantz SR-6011 9C | Audio Source AMP-100VS | iNuke 1000DSP; TTs: 4x AuraSound Pro |
| Center: B&W CM Center 2 S2 Ed | Fronts: 2x B&W 684 S1s | Side Surrounds: 2x B&W 685 S1 |
| Front/Rear Heights: 4x Polk T15 | In-Ceiling: 2x Micca M-8C | Subs: 2x Rythmik FV15HP |
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post #30984 of 42351 Old 10-30-2017, 08:10 AM
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Originally Posted by PlasmaPZ80U View Post
I only have a single Rythmik LV12R, a 12 inch rear ported model. However, the sound quality, output and extension it provides for under $600 still puts a smile on my face every time I listen to music, watch a good movie, or play video games. Like others have mentioned it doesn't sound like a subwoofer in the sense that it blends seamlessly with the speakers, making the speakers sound like they are much bigger and deeper extending. The only time that illusion can be shattered is when you crank the sub way up and have it close enough you can feeling it shaking everything near you and you know there is no way your speakers could ever play that low that loud and clear. But when you set it up right, it becomes one with the speakers effortlessly.
Hello,

is placing the LV12R because of the rear port, any more problematic/complicated compared to the other models?
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post #30985 of 42351 Old 10-30-2017, 09:49 AM
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The Rythmik subs and servo technology seem interesting, and I am not trying to troll but are they a gimmick?
No. Not a gimmick.

Quote:
Originally Posted by terminaldawn View Post
If not… is there any reason why I should be considering anything other than this technology?
No, no reason to consider a non-servo sub that I can think of.

Quote:
Originally Posted by terminaldawn View Post
As you can see from my list below Rytmik seems to neither be the most expensive nor cheapest that made my list… Why should I go with let’s say a Rythmik FV15HP over the HSU VTF-3 MK5 for 50% more ($446)… will it give me an extra 50% in performance?
Obviously no one can answer that question but you. But I don't think you're asking the right question. The question I think you should be asking is: do you want a sub that sounds like a sub, or do you want a sub that sounds like your main speakers run flat down to 20Hz? If the former, you're wasting your money on a Rythmik. If the latter, you need a servo sub like Rythmik makes.
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Last edited by Bruce Watson; 10-30-2017 at 01:18 PM.
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post #30986 of 42351 Old 10-30-2017, 09:55 AM
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Hi, so after a few round with Audyssey on my 4300, I've got my dual rhythmik LV12Rs sounding great for movies and games. VERY nice sounding deep (and sometimes room shaking) bass for LFE channels. I'm still not very happy with music playback though , I tried a bunch of settings tweaks for two channel audio and I just can't get that same kind of deep bass from music playback. Suggestions?
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post #30987 of 42351 Old 10-30-2017, 10:24 AM
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Quote:
Originally Posted by terminaldawn View Post
Hello, I am in the market for a sub. I am considering the below list of subs. My room is 3500 cubic feet that opens up to my kitchen and dining room. Primary use will be Home Theater and very little music. I only have room for one sub or two smaller subs (smaller being much smaller than anything on below list ) due to the room layout. I can’t do the huge dual driver subs due to WAF.

My question: - The Rythmik subs and servo technology seem interesting, and I am not trying to troll but are they a gimmick? If not… is there any reason why I should be considering anything other than this technology? As you can see from my list below Rytmik seems to neither be the most expensive nor cheapest that made my list… Why should I go with let’s say a Rythmik FV15HP over the HSU VTF-3 MK5 for 50% more ($446)… will it give me an extra 50% in performance?

Thanks for any comments, thoughts, and recommendations!

HSU VTF-3 MK5 - 25Hx17.25Wx24.5D - 600W- 17Hz - 85lbs - $892 shipped
Rythmik FVX15 - 24Hx18Wx24D - 400W - 12Hz? - ~100lbs? - $999 Shipped
HSU VTF-15H MK2 - 25Hx18Wx28D - 600W - 16Hz - 110lbs - $1028 shipped
PSA V1500 - 25Hx17Wx24D - 725W - 16Hz? - 86lbs - $1099 shipped
Rythmik FV15HP - 24Hx18Wx24D – 600W – 14Hz? - ~100lbs? - $1338 Shipped
PSA V1801 – 24Hx20Wx22D – 725W – 16Hz? – 108lbs - $1399 shipped


Regarding the Rythmik servo technology, you've gotten good responses. IMO the overall design and direct servo technology make the Rythmik subwoofers very tight, clean and articulate subs that accurately reproduce the source material. They may not win the loudness wars (which it seems too many people are most interested in when buying subs) but it would only be by a few db (when comparing to the monster subs out there). If all a person wants is loud, then get any sub that has lots of distortion. But if a person wants a sub that is clean (and can still get plenty loud) get a Rythmik.


In your research, you may have missed the link below. This is a thread from a sub get together a few years back. This was in a basement home theater that was pretty large and on concrete flooring. Granted, of the subs you mentioned, only an FV15 was in attendance (and not the HP variety). But an E15 was also there (back before they were called E15HP - it had the 600 watt amp). Going through the attendees comments, a similar theme keeps popping up - how clean the Rythmik subs sounded. A caveat regarding the E15 and the comments, the idiot owner was not paying close enough attention when they were going over the rules and did not realize he could have cranked the movie section up as loud as he wanted (music section was completed at the same volume for all subs - movie section was whatever the owner was comfortable cranking it up to). What can I say, I was still eating when we went over the rules. Did I mention I brought the E15


https://www.avsforum.com/forum/113-su...ts-thread.html
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post #30988 of 42351 Old 10-30-2017, 10:56 AM
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Quote:
Originally Posted by PlasmaPZ80U View Post
I only have a single Rythmik LV12R, a 12 inch rear ported model. However, the sound quality, output and extension it provides for under $600 still puts a smile on my face every time I listen to music, watch a good movie, or play video games. Like others have mentioned it doesn't sound like a subwoofer in the sense that it blends seamlessly with the speakers, making the speakers sound like they are much bigger and deeper extending. The only time that illusion can be shattered is when you crank the sub way up and have it close enough you can feeling it shaking everything near you and you know there is no way your speakers could ever play that low that loud and clear. But when you set it up right, it becomes one with the speakers effortlessly.
Hello,

is placing the LV12R because of the rear port, any more problematic/complicated compared to the other models?
I would leave at least 12 inches from the wall/corner for smoothest, cleanest low bass. Less than 12 inches tends to overly thicken the low bass and make it boomy/muddy when the port is quite active. However, if you can do good EQ in your AVR, MiniDSP, etc. you can flatten peaks throughout the frequency range of the sub and that should clean things up considerably.

Also, the closer the port is to a wall or especially corner the more it will shake everything, even from lower SPL so giving it 12 inches or more will tame that and let you listen louder before things begin to shake.

Also, when it comes to PEQ, even modal peaks as high as 200Hz can hurt sound quality by adding boominess and muddiness to the sound, making it too thick. This applies even with a crossover around 80-100Hz and LFE channel limited to 120Hz.

And remember a lot of this applies to any sub, sealed or ported, rear ported or front ported. Placing it too close to wall or corner which is basically 2 walls will be less clean sounding than giving it some breathing room. Of course, rear ported sub are somewhat more sensitive to this especially since the port is very active with low bass in these subs.

Samsung 55" MU8000
Yamaha RX-A2070
KEF Q150 Bookshelf x 5
Rythmik L12 Sealed Subwoofer
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post #30989 of 42351 Old 10-30-2017, 11:03 AM
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Originally Posted by edwardmorris View Post
Hi, so after a few round with Audyssey on my 4300, I've got my dual rhythmik LV12Rs sounding great for movies and games. VERY nice sounding deep (and sometimes room shaking) bass for LFE channels. I'm still not very happy with music playback though [IMG class=inlineimg]https://www.avsforum.com//forum/images/smilies/frown.gif[/IMG], I tried a bunch of settings tweaks for two channel audio and I just can't get that same kind of deep bass from music playback. Suggestions?
Did you try high bass extension/damping for music? Also, make sure that the sub EQ is eliminating all significant modal peak throughout the subs' frequency range. Stuff above the crossover frequency/LFE limit of 120Hz can still harm the sound and our ears are more sensitive to higher bass frequencies.

Also make sure subs are properly level matched and time aligned. And adjust sw levels to taste in AVR for music. You want enough bass to enjoy music but not so much it overpowers the speakers and masks the midrange.

If you have access to REW software and a calibrated usb mic, you can figure out exactly what the problem is with help from experts here and in the REW thread.

Samsung 55" MU8000
Yamaha RX-A2070
KEF Q150 Bookshelf x 5
Rythmik L12 Sealed Subwoofer
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post #30990 of 42351 Old 10-30-2017, 11:09 AM
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Quote:
Originally Posted by davatar View Post
What do you guys think makes more difference, servo control, or room correction? I'm demoing some subs, and I find that some sub's own room correction helps very significantly before Audyssey XT, especially because the calibration distances are better suited to large wavelengths. Unfortunately, the Rythmik's would be hard to demo, return shipping on 100lbs of gear? If only I could borrow one for a day around here...
Rythmik subs, especially the larger models with the larger amps are known for above average on-amp controls. Many of those controls are not necessary if you use the LFE in and use a processor or AV Receiver. If you use an processor or AVR with some of the industries even better calibration software like Dirac Live or Audyssey XT32 (to name a couple), you'd be surprised how well these subwoofers, with their Servo technology, blend into your system and sound. I didn't directly answer your question because I think these technologies aren't competing, but supplemental to one another. If I had to chose one over the other, I would choose the calibration tech since it can effectively mitigate entire frequency drop outs or peaks which I believe has a greater overall advantage to sound correction than the lower distortion Direct Servo supplies. Just one man's opinion.
+1, I just use manual cut only PEQ for my sub but it really makes a difference when all significant modal peaks are cut down with EQ. Of course, sub and MLP placement is the foundation and multiple subs can help if you have enough placement flexibility to try out various combinations of placement.

Making sure multiple subs are level/time/polarity matched is also very important.

Proper selection of crossovers and in some cases the sw distance tweak is also important.

Samsung 55" MU8000
Yamaha RX-A2070
KEF Q150 Bookshelf x 5
Rythmik L12 Sealed Subwoofer
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