Official Rythmik Audio Subwoofer thread - Page 552 - AVS Forum
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post #16531 of 16536 Old Yesterday, 05:36 PM
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Originally Posted by tvuong View Post
Since JT mentioned the damping effects, can someone explain to me again how low damping setting has more output than hi and how low damping can have more 'full body' sound than hi based on my graph of the three damping settings in my room? My graph shows Hi damping setting rolls off at 10hz where as lo damping at 15hz (big different for bass to be felt, hint: should be more 'full body' sound with hi damping). Above 15hz, all three settings has identical response.
Note: each graph was measured after each Audessey recal with Aud on and DynEQ off.
Thanks.
Audyssey is throwing things off, since it is applying variable EQ. Measure again without Audyssey.


Low damping has a steeper filter slope, which cuts power-intensive low frequencies more aggressively for more headroom and adds a bit of ringing (smear).


"Full body" can be a nice way to describe ringing or sometimes distortion. Generally, neither ringing nor distortion are considered desirable, but some people prefer them, because it sounds louder and fuller.
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post #16532 of 16536 Old Yesterday, 07:01 PM
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^^ I can try to measure without Audessey to see my responses between the three settings but it does not do me any good when I watch a movie with Audessey always on, one of the main reason for buying my X4000 Denon. Why would xt32 with subeqHT throws things off? Isn't it one of the best out there?
So low damping does not translate to more output? Just more head room? I don't think I want to give up 10-15hz for that beside from having more ringing/distortion as you pointed out with low damping. Thanks Rcohen.
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post #16533 of 16536 Old Yesterday, 08:10 PM
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Quote:
Originally Posted by tvuong View Post
^^ I can try to measure without Audessey to see my responses between the three settings but it does not do me any good when I watch a movie with Audessey always on, one of the main reason for buying my X4000 Denon. Why would xt32 with subeqHT throws things off? Isn't it one of the best out there?
So low damping does not translate to more output? Just more head room? I don't think I want to give up 10-15hz for that beside from having more ringing/distortion as you pointed out with low damping. Thanks Rcohen.
More output and more headroom are the same thing. You do give up the lowest frequencies for it. It doesn't add distortion, just a bit of ringing for the lowest frequencies. I just meant that sometimes "full body" is also used to describe distortion. For some rooms and tastes, low damping is best. It's easy enough to try.

Audyssey tries to flatten out the EQ, so it hides what the sub filter settings are doing. You can (and probably should) still use it, especially if you like the sound better that way. I just meant to turn it off if you want to see what the sub filter settings do.
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post #16534 of 16536 Old Yesterday, 08:17 PM
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According to http://www.rythmikaudio.com/eq.html, low dampening is supposed to also provide a 1.5 dB boost, which is missing from your curve:

That was my understanding, that you get more output in the upper frequencies (20 Hz)by making the amp not work as hard in the lower frequencies.
Since I favor music, I calibrated Audyssey with the high damping setting, and have never tried the other settings.
I bought a Cross-Spectrum Umik and got everything ready for HDMI REW before I got my F15HPs a few months ago, but I've been enjoying them so I haven't bothered to do any measurements yet :-) But I'll have some time in a couple weeks.
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post #16535 of 16536 Old Yesterday, 09:52 PM
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1.5 db won't make any major difference in the HT or with music except on graph paper for the most part.

Klipsch RF 7 based HT 7.4, Pioneer SC 35, Acurus Five 200 amp, Chase SS 18.2(2), VS 18.1(2), Samsung BDP F 7500, Asus/My Book Live HPC 4 TB

Yaquin VK 2100 amp, McIntosh XR 5 speakers, Samsung BDP F 7500
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post #16536 of 16536 Old Today, 02:14 AM
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Originally Posted by derrickdj1 View Post
1.5 db won't make any major difference in the HT or with music except on graph paper for the most part.
When doing a/b comparisons, 1.5 db is quite audible. After long periods of time, your mind does some funky psychoacoustic stuff that would greatly diminish the difference.
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