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Single vs. Dual Subs

It's common wisdom that dual or multiple subs help smooth out bass response in different spots in the room, but what about for a dedicated listening room with a fixed single listening position? What do two subs add to the music presentation that a single dialed in sub is missing provided that single sub is dialed in perfectly for the listening position?
Caveat: not interested in the SWARM method or multiple subs at the moment, strictly comparing single to dual subs
divertiti

Showing 3 responses by eagleeye7

eagleeye7
23 posts
 
divertiti, I have a similar situation to you, relative to Sub Woofer Placement.

I solved it, which IMHO, has optimized the results, as follows.

Here's my solution:

1) Set of 12 inch, self powered 500 Watt Subs at Far Left & Right of room, set @ 70 HZ Crossover.

2) Single 15 Inch Sub Directly in Center.  This Sub Woofer is Fed its signal from a dbx 234S Electronic Crossover set @ 40 HZ Crossover Frequency, & set to SUM Left & Right Channel Inputs, which signal is in turn fed to a Classe 25 in Mono Mode, putting out an honest 1,000 Watts.  dbx 234S gets its signal directly from the second output of my pre-amp.

3)  Combined with PS Audio BHK  Signature 300 Mono Blocks, feeding a pair of Anthony Gallo Acoustic 3.0's, three way speakers.

This combination of Speakers puts out Exceptional Non Boomey Bass with Massive Slam, as the 15 Inch Sub Woofer is driving directly into one, when they are sitting in the sweet spot.

I find the "Single Very Low Bass Sub", summing both Left & Right Bass signals to be optimum for Deep Bass, while not interfering with the music that one plays.  

eagleeye7
23 posts
 
  1. mc ~ " It is all summed at that frequency anyway. But, whatever.  "
  2. Kindly explain HOW, in your opinion, that happens???
eagleeye7
23 posts
 
mc, Why state the obvious, then attempt to justify it?

Why have two Low Bass Stereo SUB Woofers, when as you state it's difficult to record  Very Low Bass Frequencies in Stereo?

Wouldn't summing Left & Right Low Bass Frequencies Electronically, (which can be done efficiently, with a Summing Electronic Cross Over) then playing them back from a Central Low Bass Sub Woofer, as I suggested, provide a better option?

As I indicated, I still have Stereo Bass from my 12 Inch Sub Woofers for Localization of those Mid Bass Frequencies; via their placement on far left & far right, which provides such localization for those frequencies.

Providing Very High Power to a Single Centralized Low Bass Sub Woofer definitely puts the SLAM into those frequencies, which can be felt, but not heard by most people.   

Try it, I guarantee that you will like it!

eagleeye7

  
 
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