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Official Rythmik Audio Subwoofer thread - Page 249

post #7441 of 15139
Quote:
Originally Posted by oconnell610 View Post

Does this discount apply to the CI version as well? Brian if you could comment, that would be wonderful!

There is also a discount for CI version, but not as hefty as $100. If we base the retail price purely based on some pre-determined mulitple of cost, H550 does not deserve a $100. A more reasonable discount will be $30. But in the case of finished subs, I have been used that as an alternative to offering discount on H600-based FV15HP or F15HP. Since you have asked and to go with the holiday spirit, we will offer a bit more disocunt on H550 CI kits. It still won't be as hefty as $100, but it will be more than what it is now.
post #7442 of 15139
Quote:
Originally Posted by David_R View Post

It sounds like a subwoofer playing measurement sweeps and pink noise which match those FR graphs wink.gif
I haven't had a chance to wrestle it into position, let alone hook it up to the HT yet. I still have to decide what I want to do for feet to allow me to slide it into place... I hate to just stick some felt pads onto the bottom like I do with most furniture (I have hardwood floors), for fear of damaging the finish if I ever decide to remove them. Yes, I'm a picky perfectionist smile.gif

I can send a set of screw-in rubber feet to you. You can put felt on the rubber feet, then you don't damage the finish. I haven't started including rubber feet on every F15/FV15 subs mainly because we only have a limited supply of those. I expect to have far more come in during Jan. Then we will include them as standard. If any customer need them right away, just shoot me an email.
Edited by Rythmik - 12/5/12 at 7:26pm
post #7443 of 15139
Quote:
Originally Posted by Rythmik View Post

The one we published is done outdoor and nearfield (meaning the mic is literally 2" away from the cone with a windscreen to protect cone hitting the mic). So it is much smoother and reliable. The close mic done in room will still have nulls and peaks. Another fact is the published curve is for DS1501/DS1510. DS1505 has also a bit more midbass output as I mentioned it has a better up end extension even in LINE-IN mode as compared to DS1501 and DS1510. And whenever there is a design choice, my design choice is that I will let the upper bass of LFE input be a bit more prominent so that customers can get a bit more "midbass slam" in LFE mode (ie, having more fun). But the emphasis should be within acceptable range.
I measured again with the mic much closer (inside the cone), and the response does smooth out some more. There's still a +6dB hump in the same spot, but if I understand you correctly that is just the DS1505's normal response. That's perfectly fine with me, since Audyssey will just EQ that out (for what little signal the sub gets in that range).
Quote:
Originally Posted by Rythmik View Post

Dave, you have a PM quesiton about what happen if we mistakenly install a vented version amplifier on an F15/F15HP. The answer is the FR will start roll-off around 40hz. That is what you will see on the so-called "sealed mode" of ported subs from other vendors. We don't offer sealed mode in FV15/FV15HP for exactly the same reason (and plus others).
I think I was responding to your email as you were writing this smile.gif Thanks for the information, I always like becoming more educated in these topics. And thanks for putting up with my endless questions smile.gif



Also, for the benefit of others in the future, I also discovered the source of the transformer hum in my plate amp. Turns out that my halogen torchiere-style lamp in the bedroom was the cause. It has a 3-way switch, and in the middle "dim" position it triggers the transformer hum. From previous posts in this thread I knew DC offset or other mains power issue was the likely culprit, so I turned off everything in the house one by one until I identified that lamp. Luckily this means I won't be needing a CMX-2 afterall smile.gif
post #7444 of 15139
Quote:
Originally Posted by Rythmik View Post

I can send a set of screw-in rubber feet to you. You can put felt on the rubber feet, then you don't damage the finish. I haven't started including rubber feet on every F15/FV15 subs mainly because we only have a limited supply of those. I expect to have far more come in during Jan. Then we will include them as standard. If any customer need them right away, just shoot me an email.
That'd be awesome. I did not expect to receive feet with the sub (I didn't even know they existed), but I'd gladly buy a set. I was contemplating making my own feet out of bolts (with the correct thread), some plywood circles, and felt pads. Pre-made ones would be much more convenient smile.gif
post #7445 of 15139
As of yesterday evening, I have finally joined the Rythmik Nation (J. Jackson pun intended). I would have liked to buy new from Brian and support his company, but finanically I just couldn't do it at this time. So, with my wife's blessing after intense negotiations, I drove 80+ miles one way and picked up a used F15HP (8 months old) last night. I feel pretty lucky, as I've been looking for a used F15HP or FV15HP sub for a long time and have never seen one for sale local to me within a 2-3hr drive.

I do have a couple of questions for everyone.

Does any printed information (owner's manual) come with the sub? The original owner thinks he discarded it. I'd like to find a copy, if it's worthwhile.

Please correct me if I'm wrong, I remember that there is also a setup guide on the Rythmik website, however, I can not find it. My seaches in this thread have come up lacking. Can someone point the link out to me?

I'm unfortunately sub-cable-less until tomorrow, but this weekend will be a good one.....biggrin.gif
post #7446 of 15139
Quote:
Originally Posted by Kruppy View Post

Does any printed information (owner's manual) come with the sub? The original owner thinks he discarded it. I'd like to find a copy, if it's worthwhile.
Please correct me if I'm wrong, I remember that there is also a setup guide on the Rythmik website, however, I can not find it. My seaches in this thread have come up lacking. Can someone point the link out to me?

The only thing I know of is the 1-page amp "quick guides". There's a few different ones (depending on which amp), and they're not all linked to from the same place. Here's the ones that I found:
  • PEQ3 sealed (same for A370, H550, and H600, I believe)
  • PEQ3 vented (same for A370, H550, and H600, I believe)
  • PEQ2 (same for A370, H550, and H600, I believe)
  • A370PEQ (don't know if there was ever an H550/H600 version)
  • A370XLR (don't know if there was ever an H550/H600 version)
I didn't find PDF's for the XLR2 or XLR3 amps, but I think they've been discussed in this thread.

Hope this helps,
-- Dave
post #7447 of 15139
Quote:
Originally Posted by David_R View Post

The only thing I know of is the 1-page amp "quick guides". There's a few different ones (depending on which amp), and they're not all linked to from the same place. Here's the ones that I found:
  • PEQ3 sealed (same for A370, H550, and H600, I believe)
  • PEQ3 vented (same for A370, H550, and H600, I believe)
  • PEQ2 (same for A370, H550, and H600, I believe)
  • A370PEQ (don't know if there was ever an H550/H600 version)
  • A370XLR (don't know if there was ever an H550/H600 version)
I didn't find PDF's for the XLR2 or XLR3 amps, but I think they've been discussed in this thread.
Hope this helps,
-- Dave

Thanks this is a start.
post #7448 of 15139
Quote:
Originally Posted by Cowboys View Post

^^
FV15HP

Quote:
Originally Posted by audionuts View Post

I have dual fv15hp and they are doing a very good job on both music and HT. Rythmik ported sub is nearly as good as any sealed sub out there in term of tightness and midbass punch.

Quote:
Originally Posted by DonH50 View Post

Handwaving subjectivitis post:
The FV15 is ported so offers a little higher output but less extended LF below the port frequency. The F15 is sealed so does not roll off as fast, offering a bit deeper bass. Both use the patented Rythmik servo (feedback control) loop so performance is pretty comparable and much better than many other subs. Sealed designs generally offer a little better sound as the cone movement is better controlled; Brian says he can tell a slight difference comparing ported to sealed using his servo design. I rather doubt I could. There is the potential for port noise (a sort of "chuffing" sound) with any ported design but for a good design used within its limits that is unlikely. The HP version of either provides a more powerful amplifier and longer-throw speaker (driver, cone) that adds perhaps 2 - 3 dB, a difference you are unlikely to hear and only a small increase in headroom.
Search this thread and the Rythmik web site; Brian (the owner and designer of Rythmik) has posted both response graphs and tabulated the output of various subs in the line.
I would guess the F15 would do movies just fine. The trend I have observed is for folk to buy the biggest, most powerful model with the idea of "future-proofing" and not wondering later if they might have benefitted from more power etc. I suspect the vast majority are succumbing to testosterone rather than knowledge or listening, but so it goes... Perhaps that is just my own ego speaking, since all I own is a pair of puny little F12’s… smile.gif They do shake the walls in my modest room.
FWIWFM - Don
p.s. I would advocate a pair of subs for a large space, or evena small space, to help smooth out the response.

Quote:
Originally Posted by JHAz View Post

FWIW, Brian from Rythmik posted the folllowing in a subwoofer shootout thread hereabouts a year or so ago:
At 20 Hz, our subs vary in their maximum output capability. The output at 20 Hz is shown relative to F12.
F12: 0db (baseline)
F15: +2db D15: +2db
FV12: +3db
E15HP: + 3.5db
F15HP: +4db
FV15: +7db
FV15HP: +9db
So the FV15 will be about 5 dB louder at 20 Hz. The advantage goes away as you increase in frequency. It's stuck in my head that Brian has suggested max output is similar once you get to around 50 or 60 Hz, but I could be remembering wrong.
Also, what DonH says above.
I guess the other thing I'd add is that at a sub shootout in Kansas City semirecently, nobody could accurately tell whether a sub was sealed or ported just by listening (when the subs were behind the curtain with the Wizard). So while there apparently are differences that at least trained listeners can hear, my overall (and surprising to me) take is gravitating toward, "if a sub is well designed whether it is ported or sealed will not result in a significant audible difference, if they are operated within their linear ranges." But my bias remains, "I'd do sealed if I can get adequate output at an appropriate cost." But I realize it's really a bias, like my preference for using lossless soundtracks where available although I know, intellectually, that the higher bitrate lossy codecs present on BluRays are likely sonically indistinguishable from the lossless, especially in my imperfect room at my (-10 to 20 dB from reference) listening levels.

Quote:
Originally Posted by DonH50 View Post

Thanks for finding the info, JHAz. I had forgotten there was such a difference in output from the F12 to FV15HP (which was not available when I got my F12's, probably a good thing). Note the loudness curves compress at LF so a difference of 5 dB or so is likely to sound twice as loud, not that it matters all that much unless you really need that extra headroom.
IIRC, for well-designed subs and especially using servos, the only real significant difference between ported and sealed in normal operation is the ported models will roll off faster than the sealed. Since that frequency is so low on these subs I doubt anybody can tell. I think the difference in SQ is very small, again likely indetectable at such low frequencies.
IME, poor ported designs are readily detectable by their higher distortion and/or port noise. Most ported designs do just fine at normal or even unreasonably high listening levels.
FWIWFM - Don

Thanks everybody!

If I can only purchase a single sub, but my room is big (4000 cubic feet not including opening up to a kitchen and dining nook), do I need the extra db from the bigger amps or ported designs? I never listen at reference volume -- it's just too loud for me.

I'm coming from a Klipsch RW-12D. I think it was a combination of poor placement (this was at an old house -- I just moved) and not spending enough time dialing it in, but I was very disappointed. It sounded alright for movies for some low rumble, but I just couldn't get any power or thump for music. Unless I really cranked my system, I sometimes wasn't sure if it was on.
post #7449 of 15139
Quote:
Originally Posted by woody777 View Post

Thanks everybody!
If I can only purchase a single sub, but my room is big (4000 cubic feet not including opening up to a kitchen and dining nook), do I need the extra db from the bigger amps or ported designs? I never listen at reference volume -- it's just too loud for me.
I'm coming from a Klipsch RW-12D. I think it was a combination of poor placement (this was at an old house -- I just moved) and not spending enough time dialing it in, but I was very disappointed. It sounded alright for movies for some low rumble, but I just couldn't get any power or thump for music. Unless I really cranked my system, I sometimes wasn't sure if it was on.
Don't know what your budget is but unless its pretty big you might want to try another RW12 for $299 when they go back on sale. 2 subs instead of one properly placed and calibrated could make a big difference. Otherwise you may have to look at something in the $800-$1000 range.
post #7450 of 15139
Any single sub in the Rythmik line is within budget. I just can't do dual subs. The space is so big because of the vaulted ceilings, but it's a family room and dual subs would just be too much. I plan on selling the Kipsch.
post #7451 of 15139
^^^
FV15hp is big and powerfull. It will suite your space well. My wife once said ”....With the black piano finish and silver cone, it is quite nice and making me forgive its gigantic foot print.....”
Edited by audionuts - 12/6/12 at 11:23pm
post #7452 of 15139
Quote:
Originally Posted by woody777 View Post

Any single sub in the Rythmik line is within budget. I just can't do dual subs. The space is so big because of the vaulted ceilings, but it's a family room and dual subs would just be too much. I plan on selling the Kipsch.
Then its a no brainer. Get the best one they have.
post #7453 of 15139
@ woody777
I suggest you get the biggest, meanest sub from Rythmik...aka FV15HP. A few months down the road, you'll be addicted and telling yourself to buy another FV15HP. biggrin.gif You have a very big space to fill, hence the need for more power.
post #7454 of 15139
Quote:
Originally Posted by Kruppy View Post

As of yesterday evening, I have finally joined the Rythmik Nation (J. Jackson pun intended). I would have liked to buy new from Brian and support his company, but finanically I just couldn't do it at this time. So, with my wife's blessing after intense negotiations, I drove 80+ miles one way and picked up a used F15HP (8 months old) last night. I feel pretty lucky, as I've been looking for a used F15HP or FV15HP sub for a long time and have never seen one for sale local to me within a 2-3hr drive.
I do have a couple of questions for everyone.
Does any printed information (owner's manual) come with the sub? The original owner thinks he discarded it. I'd like to find a copy, if it's worthwhile.
Please correct me if I'm wrong, I remember that there is also a setup guide on the Rythmik website, however, I can not find it. My seaches in this thread have come up lacking. Can someone point the link out to me?
I'm unfortunately sub-cable-less until tomorrow, but this weekend will be a good one.....biggrin.gif

Hey congrats! You're gonna like the F15HP a LOT. Just a reminder, no need to spend big bucks for a subwoofer cable. Amazon has some good choices at great prices if you need a longer cable and can wait for delivery, or newegg too.
post #7455 of 15139
Quote:
Originally Posted by zycomatique View Post

Hi!
I'm trying to contact rythmic audio via their website but there's no answer! Is there a problem with this brand?
Thanks: David

Quote:
Originally Posted by qguy View Post

None, but the other brands has a problem with this brand biggrin.gif

LOL!!

Well said, mate. biggrin.gif
post #7456 of 15139
Quote:
Originally Posted by woody777 View Post

Thanks everybody!
If I can only purchase a single sub, but my room is big (4000 cubic feet not including opening up to a kitchen and dining nook), do I need the extra db from the bigger amps or ported designs? I never listen at reference volume -- it's just too loud for me.

I have a single FV15HP in a space at least that large. I also listen at less than reference level. The FV15HP is plenty for my needs, and the same will almost certainly be true for you.

The FV15HP was nearly rattling my closet door off its hinges while viewing the "Darla" scene in Finding Nemo a few nights back. smile.gif
post #7457 of 15139
Quote:
Originally Posted by polizzio View Post

Hey congrats! You're gonna like the F15HP a LOT. Just a reminder, no need to spend big bucks for a subwoofer cable. Amazon has some good choices at great prices if you need a longer cable and can wait for delivery, or newegg too.

Personally I like using www.monoprice.com for my cable needs. Great cables for a great price and fast shipping.
post #7458 of 15139
Quote:
Originally Posted by audionuts View Post

^^^
FV15hp is big and powerfull. It will suite your space well. My wife once said ”....With the black piano finish and silver cone, it is quite nice and making me forgive its gigantic foot print.....”

Quote:
Originally Posted by Skylinestar View Post

@ woody777
I suggest you get the biggest, meanest sub from Rythmik...aka FV15HP. A few months down the road, you'll be addicted and telling yourself to buy another FV15HP. biggrin.gif You have a very big space to fill, hence the need for more power.

Quote:
Originally Posted by skriefal View Post

I have a single FV15HP in a space at least that large. I also listen at less than reference level. The FV15HP is plenty for my needs, and the same will almost certainly be true for you.
The FV15HP was nearly rattling my closet door off its hinges while viewing the "Darla" scene in Finding Nemo a few nights back. smile.gif

I'm sure the FV15HP will absolutely crush for movies, but how do you guys like it for music?
post #7459 of 15139
^^^
Not long ago, my gold was buying one FV15hp for HT used. But guess what, I have 2 in my system now. These dual subs have become an importance component in my hybrid HT and 2channels music system.

The FV15hp has a very high quality bass. I don't know about the bass quality of Rythmik sealed sub so I cannot compare but in my house, the ported 15s sound tight and tuneful. Adding more weight and body to my system bottom octave. (my Salk Soundscapes are no slought in that department) Never in my mind, the ported sub could sound this good.

Rythmik FV15hp redefined my view about the bass quality of ported subs. It is not the typical ported subs that you can find somewhere else. just my 2cts
post #7460 of 15139
Hey Brian,

Any thoughts on using a Rythmik DIY kit in a Folded Horn or Tapped Horn box like the Danley DTS or Bill Fitz Tuba HT ?
post #7461 of 15139
I took advantage of the -$100 550 amp and ordered one last night. I have been researching for an entire week and had boiled it down to 1 of 3- FV15HP, HSU VTF15-H, or SVS PB/PC13 Ultra. After reading many comparisons and a lot of threads, I came to the conclusion that I wouldn't be disappointed with any of them. I wanted the SVS but didn't want to spend the extra $. I almost ordered the HSU, but the -$100 deal plus comparisons showing the FV15HP went a little lower with a little more SPL changed my mind. Since I've always been a believer in the "psychology" factor (that nagging doubt about whether you bought the better of 2 whatevers even though you probably won't hear the difference), I went with the Rhythmik. I am very excited to hear what I have been missing. Thanks to all of you on these subwoofer forums- including the other brand posters.
post #7462 of 15139
Quote:
Originally Posted by jonathanc View Post

Hey Brian,
Any thoughts on using a Rythmik DIY kit in a Folded Horn or Tapped Horn box like the Danley DTS or Bill Fitz Tuba HT ?

I still has DTS at home that I bought and wanted to try with servo. The difficult I ran into is this. The modelling of impedance has been very difficult. It has multiple impedance peaks and impedance nulls. Each impedance peak represents a local high excursion point and each impedance null is local minimal excursion point. Each of them is capable of producing ringing in time domain. When we have too many of those, it becomes difficult to come up with a servo network that can address all of them. The result is there will be one or two of them left and that produces ringing. But I found between the sealed version servo board and the vented version servo board, the latter is more suitable for horn. So far there is one Russian customer told me he was going to use it for horn bass module. I haven't followed up with him.
post #7463 of 15139
Quote:
Originally Posted by jonathanc View Post

Hey Brian,
Any thoughts on using a Rythmik DIY kit in a Folded Horn or Tapped Horn box like the Danley DTS or Bill Fitz Tuba HT ?
I know that a builder has used the Rythmik driver successfully in the THT, but I don't believe he ever hooked up the servo. Perhaps you might get an answer about that on my forum.
post #7464 of 15139
Quote:
Originally Posted by Bill Fitzmaurice View Post

I know that a builder has used the Rythmik driver successfully in the THT, but I don't believe he ever hooked up the servo. Perhaps you might get an answer about that on my forum.

If he didn't use our servo amp, that is a different story. But if he uses the servo amp I sent him without the servo sensing feedback, it is un-usable because it becomes a current drive amplifier and the output at the impedance peaks just become higher and the output at the impedance nulls just become lower. In other words, to use our amp without servo, the customers have to buy a "non-servo" daughter circuit board to replace the servo daughter board. It is not as simple as just "don't connect the sensing feedback".
post #7465 of 15139
Hello, Brian!

Some time ago (Nov 25) i tried to make an order on your website (Order ref: 3778674), order no , but after several days i had no responce, so i decided to have my money back, and did it with Paypal. But still i want to make a purchase from you, so can you please tell me, when you guys will be able to process orders? After NY? Is the online shop closed for international buyers?

And some other questons. I tried to reach you by the phone, but none of the phone numbers mentioned on the website work. I wrote you an e-mail but it said that your e-mail address doesn't exist. Is there an option to stay in touch with you?

Waiting for your answer. Thank you!
post #7466 of 15139
Sold my JL F113, that I had longer than any gear that I can remember, in a few month I'll be looking on replacing it with either a Rythmik seal sub or one of the other ID subs. I was wondering is there anything new coming down the pike from Rythmik? Depending on few things I might just spring for two, perhaps a 12".

Thanks

Djoel
post #7467 of 15139
Quote:
Originally Posted by FFF86 View Post

Hello, Brian!
Some time ago (Nov 25) i tried to make an order on your website (Order ref: 3778674), order no , but after several days i had no responce, so i decided to have my money back, and did it with Paypal. But still i want to make a purchase from you, so can you please tell me, when you guys will be able to process orders? After NY? Is the online shop closed for international buyers?
And some other questons. I tried to reach you by the phone, but none of the phone numbers mentioned on the website work. I wrote you an e-mail but it said that your e-mail address doesn't exist. Is there an option to stay in touch with you?
Waiting for your answer. Thank you!

We did cancel the order as I was on a trip to far east and didn't have time to ship the order in time. We have quite a few Russian orders. But to ship orders to Russia, I need to go to postal office in person and wait in line (for orders from other countries, I can just drop them off at the counter and leave). So I'd like to do that in batches. We can take order now. Please try (512)565-3712. I did get to talk to one Russian customer last week. But there is a time zone difference. I cannot list my email on the forum or my mailbox will be fillled with SPAM emails (there are search-bot? on the internet constantly collecting email address). I will recommend to use the on-line contact form. After you submit the form, we will use our regular email address to communicate with you.
post #7468 of 15139
^^^
Perhaps Brian can comment on the soon-to-be-released F25s with 800 W amp. I think they can easily compete with the JL f113 that you sold. Get a pair of these dual 15" servo subs and you should have some of the very best bass performance for an average audiophile. Of course if you have a deep pocket, stack two or even three F25s per side and proclaim yourself as the king of powerful and articulate bass smile.gif
post #7469 of 15139
Quote:
Originally Posted by jheyau View Post

^^^
Perhaps Brian can comment on the soon-to-be-released F25s with 800 W amp. I think they can easily compete with the JL f113 that you sold. Get a pair of these dual 15" servo subs and you should have some of the very best bass performance for an average audiophile. Of course if you have a deep pocket, stack two or even three F25s per side and proclaim yourself as the king of powerful and articulate bass smile.gif

I' looking for Cute and Smallish wink.gif It's one of the things I loved about the F113. Thanks for the info.

DJoel
post #7470 of 15139
Quote:
Originally Posted by Rythmik View Post

If he didn't use our servo amp, that is a different story. But if he uses the servo amp I sent him without the servo sensing feedback, it is un-usable because it becomes a current drive amplifier and the output at the impedance peaks just become higher and the output at the impedance nulls just become lower. In other words, to use our amp without servo, the customers have to buy a "non-servo" daughter circuit board to replace the servo daughter board. It is not as simple as just "don't connect the sensing feedback".
I have no idea if he used your amp. The only report I had was he used the driver and liked the result.
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