Ho Ho Ho - Richard BassNut Greene

Ho Ho Ho

Posted by Richard BassNut Greene on April 28, 2007 at 07:33:51

In Reply to: Re: Much better? = NO ..... Better? = Maybe posted by Young-Ho on April 28, 2007 at 04:51:26:

I mentioned only the first order side-wall-to-side-wall room mode because second order and higher modes are likely to be above the subwoofer's range.

Reducing excitment of some room modes, or preventing some room modes by using multiple subwoofers, is a gamble because the primary bass problem in homes is INSUFFICIENT MODAL DENSITY for our ears to effectively one-third octave smooth the bass frequency response.

Therefore reducing the room's modal density is generally the opposite of what our ears want!

The right solution is to make the room surfaces more flexible, or to use a lot of bass traps to reduce bass reflections, so ALL room modes are weaker.

Placing subwoofers half way between walls means they will be located far from the two main speakers -- that makes the subwoofers less likely to be sonically invisible, and deteriorates a two-channel stereo image. Remember that the attack of bass notes comes from the front speakers mid-range driver (three-way speaker) or the bass-mid-driver (two-way speaker) -- so why would anyone want the rest of the bass note to come from their side, or from behind them?

Trying to prevent some room modes by using two subwoofers, or placing subwoofers in partial nulls to reduce the excitement of room modes, does not automatically improve the subjective bass quality.

One of the common problems is that multiple subwoofers are ALL placed on the floor where they fully excite the (frequently excited by music content) first-order floor to ceiling room mode (70 Hz. in an 8 foot tall room).
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Richard BassNut Greene
Subjective Audiophile 2007

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Follow Ups Full Thread

Topic - Are two subs really much better than one sub? I am - audiogatorjim 05:27:49 04/27/07 (18)

Re: Are two subs really much better than one sub? I am - Lowrider 01:39:26 05/02/07 (0)

Re: yes, but advantage decreases with crossover setting - Jon L5 14:14:01 04/28/07 (0)

All I know is what I heard... - WildWest 17:05:41 04/27/07 (0)

I just went to 2 from one (Carvers), and in my room there was a very... - jonbee 12:19:29 04/27/07 (0)

Yes - Duke 10:16:49 04/27/07 (1)

what about giant bass horns ? - Kloss 12:34:06 04/28/07 (0)

Much better? = NO ..... Better? = Maybe - Richard BassNut Greene 09:19:56 04/27/07 (4)

Then again, surely ... - andyr 05:16:27 04/30/07 (0)

Re: Much better? = NO ..... Better? = Maybe - Young-Ho 04:51:26 04/28/07 (2)

Ho Ho Ho - Richard BassNut Greene 07:33:51 04/28/07 (0)

Re: Much better? = NO ..... Better? = Maybe - Young-Ho 05:00:54 04/28/07 (0)

See this for the answer to the question - doyall 08:19:28 04/27/07 (3)

Great article. Thanks for the link - Metralla 07:56:09 04/28/07 (0)

Re: See this for the answer to the question - Duke 13:43:36 04/27/07 (0)

Very cool! Conclusions are not in line with common practice, but - jonbee 12:32:58 04/27/07 (0)

Re: Are two subs really much better than one sub? I am - STUART 06:07:43 04/27/07 (2)

HT one sub, For HT 1 sub is OK, for music only 2 - mattcecil1@yahoo.com 09:07:00 04/27/07 (1)

Re: HT one sub, For HT 1 sub is OK, for music only 2 - simon wagstaff 04:19:00 04/28/07 (0)

Follow Ups

Ho Ho Ho - Richard BassNut Greene 07:33:51 04/28/07 (0)

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