Official Rythmik Audio Subwoofer thread - Page 1029 - AVS Forum | Home Theater Discussions And Reviews
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post #30841 of 30856 Old Today, 11:40 AM
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Originally Posted by chucky7 View Post
Based on the measurements we did for PSA V1801, adjusted for the difference between V1801 and V3601, FV18 has huge advantage @ 16 Hz and below, from 31.5 Hz and above V3601 has 4~8dB of advantage.


Was that advantage with all ports open?


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post #30842 of 30856 Old Today, 11:44 AM
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Originally Posted by imureh View Post
Was that advantage with all ports open?
Yes, 16 Hz mode, which is all ports open.

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post #30843 of 30856 Old Today, 12:01 PM
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Originally Posted by CMonster View Post
Did you get both subs at once, or one then the other?
I bought a pair when they were first released a couple of years ago. I needed the front facing ports because of where they had to go, and I knew I'd have sufficient room modes that I needed a pair.
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Originally Posted by Alan P View Post
Are you saying that your wife actually cares about the quality of the bass? A rarity indeed.
She does. She was pretty skeptical at first, but waited until I got them running and got a good Audyssey MultEQ XT32 setup done. First demo left her gobsmacked. She's been hooked since. She's quite a rarity indeed; this is but one reason why.
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post #30845 of 30856 Old Today, 12:17 PM
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Originally Posted by Rythmik View Post
Sorry to hear the veneer issue. Please send us a photo for it and we will investigate and pay more attention to it.


As for subwoofer location, place in the middel of room is no-go.
Okay thanks for the reply Brian; I e-mailed you and Enrico some pics and a video.

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post #30846 of 30856 Old Today, 01:38 PM
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Quote:
Originally Posted by chucky7 View Post
Based on the measurements we did for PSA V1801, adjusted for the difference between V1801 and V3601, FV18 has huge advantage @ 16 Hz and below, from 31.5 Hz and above V3601 has 4~8dB of advantage.
Much more coherent and helpful than suggesting a sub will "smash to pieces" another. One more dB in that range and we could likely see people use something even more ambiguous, like "pulverize" or "obliterate"?
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post #30847 of 30856 Old Today, 02:02 PM
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Quote:
Originally Posted by chucky7 View Post
Based on the measurements we did for PSA V1801, adjusted for the difference between V1801 and V3601, FV18 has huge advantage @ 16 Hz and below, from 31.5 Hz and above V3601 has 4~8dB of advantage.
with all the different adjustments on the amp of the rythmik subs Im surprised you coudnt get the sub with peq or rumble filter or other settings to boost 30+hz...but anyways, rythmik sounds very, very even with music. its not a boomy sub...so if you like the boom, maybe better options.

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post #30848 of 30856 Old Today, 02:16 PM
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Originally Posted by torii View Post
with all the different adjustments on the amp of the rythmik subs Im surprised you coudnt get the sub with peq or rumble filter or other settings to boost 30+hz...but anyways, rythmik sounds very, very even with music. its not a boomy sub...so if you like the boom, maybe better options.
Of course when we did the measurements we disabled the PEQ, and just have enough protection for the driver.

You do have to realize that the FV18 and V3601 are not in the same price class and have different design philosophy. As competitive as the ID sub market is, wouldn't you expect the $450 or 26% more expensive product to have more output at most, if not at all, frequencies?

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post #30849 of 30856 Old Today, 02:18 PM
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ofc. 2 18's vs 1 and more expensive.

Power: Marantz sr7008, NAD C 275Bee x 2, Video: Oppo 103, Samsung 75un6300
Speakers: Focal aria 948, Focal cc900, Klipsch synergy KSF 10.5 Subs: Rythmik FV25HP, Rythmik FV15HP
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post #30850 of 30856 Old Today, 02:35 PM
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Quote:
Originally Posted by torii View Post
Quote:
Originally Posted by chucky7 View Post
Based on the measurements we did for PSA V1801, adjusted for the difference between V1801 and V3601, FV18 has huge advantage @ 16 Hz and below, from 31.5 Hz and above V3601 has 4~8dB of advantage.
with all the different adjustments on the amp of the rythmik subs Im surprised you coudnt get the sub with peq or rumble filter or other settings to boost 30+hz...but anyways, rythmik sounds very, very even with music. its not a boomy sub...so if you like the boom, maybe better options.
Assuming we are talking about headroom and not merely frequency response, EQ will not increase headroom.

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post #30851 of 30856 Old Today, 02:39 PM
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Originally Posted by PlasmaPZ80U View Post
Assuming we are talking about headroom and not merely frequency response, EQ will not increase headroom.
if you shift away from the super low frequencies, it will create more headroom in the upper frequencies if Im not mistaken...so if I were to compare, I would adjust the rythmik sub to focus just on 31hz and up when comparing to another sub that was strong 31hz and up...maybe my thought process is off.

Power: Marantz sr7008, NAD C 275Bee x 2, Video: Oppo 103, Samsung 75un6300
Speakers: Focal aria 948, Focal cc900, Klipsch synergy KSF 10.5 Subs: Rythmik FV25HP, Rythmik FV15HP
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post #30852 of 30856 Old Today, 02:44 PM
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Quote:
Originally Posted by torii View Post
if you shift away from the super low frequencies, it will create more headroom in the upper frequencies if Im not mistaken...so if I were to compare, I would adjust the rythmik sub to focus just on 31hz and up when comparing to another sub that was strong 31hz and up...maybe my thought process is off.
PlasmaPZ80U is right.

The PEQ, filter, or LF Adjust changes the FR but not the CEA 2010 Max burst numbers, which were what we measured.
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post #30853 of 30856 Old Today, 02:48 PM
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ok, didnt know that.

Power: Marantz sr7008, NAD C 275Bee x 2, Video: Oppo 103, Samsung 75un6300
Speakers: Focal aria 948, Focal cc900, Klipsch synergy KSF 10.5 Subs: Rythmik FV25HP, Rythmik FV15HP
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post #30854 of 30856 Old Today, 02:48 PM
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Quote:
Originally Posted by chucky7 View Post
Quote:
Originally Posted by torii View Post
with all the different adjustments on the amp of the rythmik subs Im surprised you coudnt get the sub with peq or rumble filter or other settings to boost 30+hz...but anyways, rythmik sounds very, very even with music. its not a boomy sub...so if you like the boom, maybe better options.
Of course when we did the measurements we disabled the PEQ, and just have enough protection for the driver.

You do have to realize that the FV18 and V3601 are not in the same price class and have different design philosophy. As competitive as the ID sub market is, wouldn't you expect the $450 or 26% more expensive product to have more output at most, if not at all, frequencies?
Yes, Rythmik pays more attention to extension and output below 20Hz even if it may not get as loud above 20Hz as a result. Also, Rythmik tends to focus on a sealed sub sound and frequency response, even with the ported models.

The real question to the buyer is what are they looking for, how much is their budget and how many/how big and heavy subs can they fit/handle.

I personally would never be looking at the massive, 100lb+ models because I couldn't fit or move them plus I don't think any of the Rythmiks' are lacking in output in a 1150 cubic foot room well under reference level.

However, as room volume increases and higher listening levels are desired, the bigger, heavier models start to make sense...

That being said with 2-4 LVX12s or L22s, I think most could have tons of output and extension and not have to move around massive subs that take up plenty of floor space. Could work even in medium to large rooms.

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post #30855 of 30856 Old Today, 03:03 PM
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Quote:
Originally Posted by torii View Post
Quote:
Originally Posted by PlasmaPZ80U View Post
Assuming we are talking about headroom and not merely frequency response, EQ will not increase headroom.
if you shift away from the super low frequencies, it will create more headroom in the upper frequencies if Im not mistaken...so if I were to compare, I would adjust the rythmik sub to focus just on 31hz and up when comparing to another sub that was strong 31hz and up...maybe my thought process is off.
Well, yes filtering out the sub 20Hz stuff could free up some headroom for midbass region. But if, my memory serves right most here didn't really prefer doing that unless the goal was with the multi tune ported subs to reduce port noise/chuffing by leaving all ports open.

Brian Ding told me that for my LV12R, which has a single port tuned to 19Hz I would not gain or lose headroom regardless of the bass extension/damping choices (low, mid, high). So, at least in that case, even though it changes the low end response, high extension/damping won't increase midbass headroom.

Which is fine because it can play up to 6dB louder at 30Hz than 20Hz, and up to 10dB louder at 80Hz. So, the low end will compress first at any given SPL level, though because the high setting rolls off 20Hz by about 5dB at 20Hz vs. the low setting, that can allow one to access more of the midbass headroom while keeping the low end relatively uncompressed.

But again, this is more to do with frequency response than absolute headroom and we haven't even factored in boundary gain or room gain, or multiple subs.

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post #30856 of 30856 Old Today, 03:44 PM
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Other point I wanted to make is actually more of a question. Let's say you have a sealed sub with about 10Hz extension in room. That's without any rumble filter to limit ulf. Now if you turn rumble filter on (lets say 20Hz 18dB per octave like with L12/L22), will you gain any headroom with burst tones? REW sweeps? (above 20Hz, of course)

What kind of measurement could potentially show increased midbass headroom by filtering ulf?

And would this be any different with the multi tune ported subs between the all ports open and one port plugged modes? I imagine changing port tune is a bit more complex than a simple rumble filter on a sealed sub.

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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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