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Group delay in subwoofers

I understand the phenomenon of group delay when subwoofers are connected to a preamp and that they need to be placed approximately 8 ft closer to the listener than the mains.  Is this also the case when connecting a sub through the speaker level inputs from an amplifier or is group delay much less of an issue in this configuration?

jc4659
jc4659 OP
564 posts
 
Thanks for the comments.  I had a feeling that it wasn't quite as simple as I had hoped.

erik_squires
16,389 posts
 
JC: Group delay for subs isn't as important as the proper phase/amplitute matching through the crossover, room acoustics and EQ.

That's where you should focus your time and energy.
jc4659 OP
564 posts
 
Thanks, Erik.  I absolutely agree and would need to buy a processor to do it the right way.
bdp24's avatar
bdp24
9,949 posts
 
Rythmik Audio subs come with a plate amp that includes a continuously-variable phase control. The control allows time-aligning woofers to speakers without physically moving either. The Rythmik PEQ model plate amps also provide both low level connection (on RCA jacks) and high/speaker level (on binding posts).
gillatgh's avatar
gillatgh
381 posts
 
For real and detailed information go to soundoctor.com and get ready for some serious reading. Super informative and helpful.
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