Official Rythmik Audio Subwoofer thread - Page 1285 - AVS Forum | Home Theater Discussions And Reviews
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post #38521 of 40480 Old 05-17-2019, 09:27 AM
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Originally Posted by McLuvin View Post
Ok, I must have missed something here. I knew you had the F18's coming, but I thought they were for your bedroom? Do you still have the FV25HP's?


edit: looks like you are selling the FV25HP's?? if so, you are worse then I am!


Glad to hear you like the F18's. I heard them at a Dallas GTG a couple of years back and couldn't get over how clean they sounded. I am curious how much you think a G28 might be better over a G25HP? I am seeing if Salk will build me a G28 right now but it's a little intimidating since it's such an unknown and a huge cabinet.

G28? Do we mean F18?


I will post a little review of my G25HP I have later. I am very much a fan of the G25HP. I considered getting the F18 but was steered towards the G25HP by Enrico and a few others. I do not regret purchasing this sub. The G25HP is amazing.
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post #38522 of 40480 Old 05-17-2019, 11:35 AM
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Originally Posted by Gary Bechtold View Post
G28? Do we mean F18?


I will post a little review of my G25HP I have later. I am very much a fan of the G25HP. I considered getting the F18 but was steered towards the G25HP by Enrico and a few others. I do not regret purchasing this sub. The G25HP is amazing.

No typo... a custom G28 build from Salk. Still trying to see if it's feasible (all indications point to yes right now).
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post #38523 of 40480 Old 05-17-2019, 11:51 AM
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Originally Posted by torii View Post
the nad amps bridged put out over 1200 watts.


my measurements are always at mlp which is 12 feet from front speakers. 5ft from fv15hp and 17ft from fv25hp. I use test tones for sweeps. when I get my new maggie lrs in I will redo measurements. I remember making adjustments to umik mic and mic settings in rew. i was _+10 MV on marantz which is way above what anyone will listen at and never went below 3.1 db headroom in rew. think i used hdmi 3 with cc unplugged. have my system tweaked now where 0mv on avr allows for 121db. I like seeing what stuff can max burst at from my car stereo days...not recommending any of it.
Those are some powerful amps, and they do explain the main speaker output.

But they don't explain your subwoofer measurements.

FV15HP maxes out at 106.6dB at 20Hz.
FV25HP, 113.6dB at 20Hz.

Room gain can add a little to that, but not nearly as much as you're quoting. That's why I wondered about CH4, since subtracting 10dB puts you very close to reality.

EDIT: more thinking - maybe you weren't quoting 20Hz figures?

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post #38524 of 40480 Old 05-17-2019, 12:22 PM
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Originally Posted by McLuvin View Post
No typo... a custom G28 build from Salk. Still trying to see if it's feasible (all indications point to yes right now).


G28, that will be a heavy beast. Probably would sound amazing.

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post #38525 of 40480 Old 05-17-2019, 01:11 PM
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Originally Posted by Gary Bechtold View Post
Okay, so this is a picture after 24 hours of non-stop listening to the BEAST
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post #38526 of 40480 Old 05-17-2019, 01:21 PM
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Originally Posted by McLuvin View Post
No typo... a custom G28 build from Salk. Still trying to see if it's feasible (all indications point to yes right now).
That would be beautiful, Bud: look and sound of course. When can I come over?
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post #38527 of 40480 Old 05-17-2019, 01:24 PM
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Quote:
Originally Posted by Soulburner View Post
Those are some powerful amps, and they do explain the main speaker output.

But they don't explain your subwoofer measurements.

FV15HP maxes out at 106.6dB at 20Hz.
FV25HP, 113.6dB at 20Hz.

Room gain can add a little to that, but not nearly as much as you're quoting. That's why I wondered about CH4, since subtracting 10dB puts you very close to reality.

EDIT: more thinking - maybe you weren't quoting 20Hz figures?
Room gain (and pressure vessel gain) can add more than "a little" (up to and exceeding +20dB in some rooms)...and don't forget to add 6dB for duals...and a even more if corner loaded. It can all add up quick!

Outputting with CH4 (LFE) in REW will not magically make the resulting graph +10dB over reality...it would be exactly the same as raising the MV or sub trim by 10dB. The resulting SPL is still "real".
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post #38528 of 40480 Old 05-17-2019, 01:36 PM
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Originally Posted by torii View Post
yea, size of room dictates alot. I can sit in my living room at 120db and have easy dialog with person. when I say 120db, I mean avg 95 db with peaks at 120 db.


and if I play some symphonic, orchestra, very clean recorded music I can hammer the master volume all the way and barely get 100 db. thats with alot of bridged watts on mains and subs boosted +10 db or more.
Can't see how that's possible. My riding mower with the blades going is around 85-88db and I have to talk REALLY loud to anyone nearby. Easy dialogue at 95dbs? I just can't see that happening.

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post #38529 of 40480 Old 05-17-2019, 02:05 PM
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Originally Posted by tvuong View Post
That would be beautiful, Bud: look and sound of course. When can I come over?

As soon as UPS drops them off so you can help me take them upstairs!
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post #38530 of 40480 Old 05-17-2019, 03:09 PM
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Originally Posted by darthray View Post
Hello Kain

Never saw that mention, if so like you. I would prefer paying extra for an assemble sub.
Even with many years of DIY experience, but no longer do.
That said, I do not see why if the customer is willing to pay extra for a complete sub instead of a kit.
Rythmik not willing to do so.

By the way, beautiful city you live in. I was very impress the malls, city road way and so many things.
And the water irrigation system between Dubai and the next one to-it (Abu Dhabi, if memory serve me right), to water the palm trees, small trees and plants.
So many wonders to see, in Dubai a very impressive city


Ray
Well, there are a lot of man-made wonders to see, no natural wonders though. It is a nice place but lacks the "realness" of other countries/places.

Quote:
Originally Posted by enricoclaudio View Post
We do ship finished subwoofers overseas. Please send us an email using our contact form with the model you are interested and your full address (zip code included) and we will get the shipping quote.
Thanks.
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post #38531 of 40480 Old 05-17-2019, 03:29 PM
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Can't see how that's possible. My riding mower with the blades going is around 85-88db and I have to talk REALLY loud to anyone nearby. Easy dialogue at 95dbs? I just can't see that happening.

low distortion is my guess
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post #38532 of 40480 Old 05-17-2019, 04:09 PM
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I finally had an afternoon to myself after getting my second sub on a Monday. Talk about a long time to wait to let these bad boys breathe! Lol

Even though after calibrating the actual dB output of the subs are the same as it was before, it just seems to hit a lot harder and seems to fill the room more. It’s awesome. With a single my gain was at about 230 and now with 2 they are at about a click before noon on the dial. Pretty significant drop on the gain to reach the same level.

I’ve got a 10-13db null between 40-50hz so I need to address that, but dang these sound nice! Running them 6-8db hot it is pretty fun.
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post #38533 of 40480 Old 05-17-2019, 04:31 PM
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Originally Posted by McLuvin View Post
No typo... a custom G28 build from Salk. Still trying to see if it's feasible (all indications point to yes right now).
Which amp will you be using? Please give us some details when you can (price too!) because this sounds like something I might be interested in. Just needs to be a big improvement over the G25, which I have and love to death.
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post #38534 of 40480 Old 05-17-2019, 04:37 PM
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Originally Posted by ianrozzano View Post
Which amp will you be using? Please give us some details when you can (price too!) because this sounds like something I might be interested in. Just needs to be a big improvement over the G25, which I have and love to death.

Just get a 2nd G25HP, they will have more output and a flatter response than a single G28HP. I have never heard a single sub setup that sounded anywhere near as good as 2. Just get 2 piano black G25HP's and enjoy. You will not be sorry.


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post #38535 of 40480 Old 05-17-2019, 04:50 PM
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Originally Posted by ianrozzano View Post
Which amp will you be using? Please give us some details when you can (price too!) because this sounds like something I might be interested in. Just needs to be a big improvement over the G25, which I have and love to death.
Amp is HX2000XLR3 as we don't make bigger amps. A G28HP should have 3dB to 4dB more output than the G25HP.

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post #38536 of 40480 Old 05-17-2019, 05:03 PM
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Originally Posted by enricoclaudio View Post
Amp is HX2000XLR3 as we don't make bigger amps. A G28HP should have 3dB to 4dB more output than the G25HP.
So is this coming or we are speculating and having fun talking about a G28HP. Maybe I missed a post talking about it? I am in the market for two new subs for my new house which won't happen until end of summer and G25HP was towards the top of my list but G28HP (assuming its 18 inch drivers) might be even further up on my list
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post #38537 of 40480 Old 05-17-2019, 05:11 PM
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Originally Posted by ianrozzano View Post
Which amp will you be using? Please give us some details when you can (price too!) because this sounds like something I might be interested in. Just needs to be a big improvement over the G25, which I have and love to death.
I thought you have a deep sea on order?

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post #38538 of 40480 Old 05-17-2019, 05:21 PM
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Originally Posted by enricoclaudio View Post
A G28HP should have 3dB to 4dB more output than the G25HP.
and so on...an FV28 should have 3-4db over an FV25. Hint hint @serith
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post #38539 of 40480 Old 05-17-2019, 05:37 PM
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Originally Posted by Frohlich View Post
So is this coming or we are speculating and having fun talking about a G28HP. Maybe I missed a post talking about it? I am in the market for two new subs for my new house which won't happen until end of summer and G25HP was towards the top of my list but G28HP (assuming its 18 inch drivers) might be even further up on my list
Just spoke with Brian about the G28HP and he is going to make some calculations tonight to see how possible this could be. The main goal with a "G28HP" is to keep the same driver size/enclosure size ratio as the G25HP so the G28HP is not the size of a two doors fridge.
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post #38540 of 40480 Old 05-17-2019, 05:38 PM
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Originally Posted by muscles View Post
Just get a 2nd G25HP, they will have more output and a flatter response than a single G28HP. I have never heard a single sub setup that sounded anywhere near as good as 2. Just get 2 piano black G25HP's and enjoy. You will not be sorry.


Greg
I was planning on doing this at some point, but I really only have one location where a sub works well in my room so I would be stacking them. Then I figured it might be better to just get one big sub instead, so I’m leaning towards the DSS 24. Even if two G25s equaled the same output as the DSS, it still wouldn’t have the awesome spectacle of a 24” driver. I want that wow factor.
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post #38541 of 40480 Old 05-17-2019, 05:41 PM
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Originally Posted by tvuong View Post
and so on...an FV28 should have 3-4db over an FV25. Hint hint @serith
A FV28 with Paper Cone should have even more than 4dB output than FV25HP from 30Hz and up. I would say more like 5dB to 6dB.

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post #38542 of 40480 Old 05-17-2019, 05:42 PM
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Originally Posted by jsc79 View Post
I thought you have a deep sea on order?
Not on order, had to put it on hold for several reasons. But it will almost certainly be my sub of choice when the time is right. I still am curious about other options from Rythmik, but I don’t think anything will sway me from that 24” driver haha.
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post #38543 of 40480 Old 05-17-2019, 06:03 PM
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Originally Posted by Alan P View Post
Room gain (and pressure vessel gain) can add more than "a little" (up to and exceeding +20dB in some rooms)...and don't forget to add 6dB for duals...and a even more if corner loaded. It can all add up quick!
Of course - but he was talking about his FV15HP (single) and FV25HP (single), not together. Room gain probably doesn't account for that big of a difference, and putting a sub in a corner doesn't increase levels (and I doubt he's just quoting us a cherry-picked peak, right torii?). So the only thing I can think of is that we're not talking about 20Hz, but 40-60Hz where output is undoubtedly greater. That could explain why he could measure such high levels. I guess I'm used to talking 20Hz output

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Outputting with CH4 (LFE) in REW will not magically make the resulting graph +10dB over reality...it would be exactly the same as raising the MV or sub trim by 10dB. The resulting SPL is still "real".
After doing some more research, I guess you are right. I thought the difference came about due to software, but that's not quite right. The 10dB LFE boost on HDMI Channel 4 is confusing and it can even vary depending on the brand of AVR you use. The caution that needs to be exercised is as follows:

https://www.andyc.diy-audio-engineer...measuring.html

Quote:
HDMI Considerations

Do Not Use HDMI Channel 4 (LFE) for Subwoofer Measurements When Using MSO to Integrate Mains and Subs

It might seem that using HDMI channel 4 (the LFE channel) to energize the subs would be the correct way to perform the sub measurements when using a typical AVR or pre-pro. However, if you are using MSO to integrate your main speakers and subs, using the LFE channel to energize the subs is incorrect. The LFE channel has a 10 dB higher gain than all other channels, so the result will be sub measurements that are in error by 10 dB from the correct values. In addition, the low-pass filter assigned to this input, sometimes callet the "LPF of LFE", will often have a different cutoff frequency from the one used in the bass management, and may even have a different slope and alignment as well. For these reasons, channel 4 should never be used to energize the subs for measurements to be used with MSO for integration of subs with main speakers. Instead, energize the subs by using the center-, left-, or right-channel signal, forcing the AVR's bass management to generate the subwoofer signal.
In short, your sub measurements will not match up with your other speakers, nor will it correlate with your MV level. But on its own, it is okay, as long as you label those measurements so you know those levels are 10dB higher than what you're going to get during normal playback. I think I have that right . Right?
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post #38544 of 40480 Old 05-17-2019, 06:13 PM
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Originally Posted by enricoclaudio View Post
A FV28 with Paper Cone should have even more than 4dB output than FV25HP from 30Hz and up. I would say more like 5dB to 6dB.
Ah, I forgot about the higher sensitivity 18” paper cone option
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post #38545 of 40480 Old 05-17-2019, 06:35 PM
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L22 or f12se music/ht

Which one of these subs for use at high and low volumes music listening sessions and HT/TV Watching. I have Separates components for my main speakers PSB Imagine T2s parasound halo amp and marantz preamp. Currently have SVS Subs and prior HSU Sub owner

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post #38546 of 40480 Old 05-17-2019, 07:00 PM
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Originally Posted by enricoclaudio View Post
Amp is HX2000XLR3 as we don't make bigger amps. A G28HP should have 3dB to 4dB more output than the G25HP.
Do I wait to discuss with Brian about getting a review unit or should I stand in line now?

 
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post #38547 of 40480 Old 05-17-2019, 07:54 PM
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Originally Posted by Soulburner View Post
Those are some powerful amps, and they do explain the main speaker output.

But they don't explain your subwoofer measurements.

FV15HP maxes out at 106.6dB at 20Hz.
FV25HP, 113.6dB at 20Hz.

Room gain can add a little to that, but not nearly as much as you're quoting. That's why I wondered about CH4, since subtracting 10dB puts you very close to reality.

EDIT: more thinking - maybe you weren't quoting 20Hz figures?

no Im not quoting 20hz...Im quoting max spl at any freq. when I get my new maggies I will do some more tests. think I showed a graph here of 120db from 20hz on...maybe I didnt...anyways...not worth arguing.


I had a youtube vid showing 120db...think 127db but I deleted my channel. I will post some more soon.
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Power: Marantz sr7008, NAD C 275Bee x 2, Video: Oppo 103, Samsung 75un6300
Speakers: Focal aria 948, Focal cc900, Klipsch synergy KSF 10.5, Magnepan LRS
Subs: Rythmik FV25HP, Rythmik FV15HP
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post #38548 of 40480 Old 05-17-2019, 08:23 PM
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Originally Posted by enricoclaudio View Post
A FV28 with Paper Cone should have even more than 4dB output than FV25HP from 30Hz and up. I would say more like 5dB to 6dB.





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Subwoofers: Dual Rythmik FV18s Rev2 with Paper cone, BOSS Platform mini riser, 2 BK LFE
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post #38549 of 40480 Old 05-17-2019, 08:28 PM
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if brian can design a dual 18in ported sub smaller than a full size fridge, he might win nobel prize. and people who want highest spl would be better at using 12 twelve inch subs imo...vs a large fridge.

Power: Marantz sr7008, NAD C 275Bee x 2, Video: Oppo 103, Samsung 75un6300
Speakers: Focal aria 948, Focal cc900, Klipsch synergy KSF 10.5, Magnepan LRS
Subs: Rythmik FV25HP, Rythmik FV15HP
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post #38550 of 40480 Old 05-17-2019, 10:07 PM
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Quote:
Originally Posted by enricoclaudio View Post
A FV28 with Paper Cone should have even more than 4dB output than FV25HP from 30Hz and up. I would say more like 5dB to 6dB.
fv28 confirmed??? please send order link?


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Originally Posted by torii View Post
if brian can design a dual 18in ported sub smaller than a full size fridge, he might win nobel prize. and people who want highest spl would be better at using 12 twelve inch subs imo...vs a large fridge.
sacrificing cabinet size results in a higher than desired tuning frequency if the goal is to create a large, low tuned enclosure though. (2) 18" drivers need a much larger enclosure than the current cabinet size of the fv25 to keep the same ~12hz tuning frequency.

just look at the current PSA v3611. that cabinet is woefully undersized for a pair of vented 18's (similar to the fv25) which results in too high a tuning frequency and increased port noise. at least that wrong has been corrected given the new TV36 (can't wait to see reviews start coming in for that).


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f12g subwoofer , integra dtc 9.8 , lv12r , Rythmik , Rythmik Audio , Rythmik Audio F12 Direct Servo Subwoofer , Rythmik Audio F15 Subwoofer , servo sub

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