LF does help with imaging, and it isn't just because it adds the fundamentals of some notes it also helps

Posted by Timbo in Oz (A) on November 16, 2006 at 13:48:41

In Reply to: Well that was weird posted by WildWest on November 14, 2006 at 19:59:00:

get attacks and decays, of each note, reproduced correctly - particularly the reverberation of the space - in acoustic recordings - caused by these two crucial events right down into the fundamentals contained in attacks and decays.

Once you have the subs LP filtering sounding right / in-step, you may find that absolute polarity begins to matter to you, on acoustic recordings at least. I'd use both wrable and discrete tones for the testing/matching period and music to confirm.

You may well also find that some recordings still need a bit more sub-bass and others less.

Are your Klipsches ported spkrs? If yes, do try them with the ports stuffed, just a bit or fully stuffed.

The latter may require a slightly higher freq for the Low Pass to the sub - to avoid a dip - so go carefully, and be willing to shift the sub slightly as well. But it 'should' also clean up the area around and above where the sub starts - by reducing cone wobble/port chuffing - particularly BELOW the stop-band of the Klipsch' port/box.

You may find, after rematching that - on music - system sounds like it has a little less mid-bass ( around the xover point) - than with the subs before.

But, if your ears had already told you the frequencies are there - during the rematching task - the correct and happy conclusion is that you have lost some distortion from the cones being out of their linear range as they try to do any ELF* stuff in the FR signal they are fed. * music or spuriae!

JMO and YMMV!

Warmest

Timbo in Oz
The Skyptical Mensurer and Audio Scrounger

'Still not saluting.'

Read about and view system at:

http://www.theanalogdept.com/tim_bailey.htm

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Follow Ups Full Thread

Topic - Well that was weird - WildWest 19:59:00 11/14/06 (12)

Two reasons... - mkuller 16:30:39 11/16/06 (0)

LF does help with imaging, and it isn't just because it adds the fundamentals of some notes it also helps - Timbo in Oz 13:48:41 11/16/06 (1)

Wrong!!!!? IIRC cone-control in a bass horn below their own high pass roll-out is rather better than unassisted Rb's - Timbo in Oz 14:05:51 11/16/06 (0)

Low frequencies and "imaging" - SWG 18:25:01 11/15/06 (1)

Re: Low frequencies and "imaging" - WildWest 19:08:07 11/15/06 (0)

Re: Well that was weird - 22L 15:46:30 11/15/06 (0)

trust your ears. i think you are - snkby 20:39:25 11/14/06 (5)

Re: trust your ears. i think you are - Jayme 12:54:50 11/15/06 (3)

ive always understood that harmonics - snkby 23:18:21 11/15/06 (2)

not exactly - 20Hz 15:07:34 11/20/06 (0)

Nope. Just up. - Jayme 06:55:55 11/16/06 (0)

Re: trust your ears. i think you are - WildWest 01:19:48 11/15/06 (0)

Follow Ups

LF does help with imaging, and it isn't just because it adds the fundamentals of some notes it also helps - Timbo in Oz 13:48:41 11/16/06 (1)

Wrong!!!!? IIRC cone-control in a bass horn below their own high pass roll-out is rather better than unassisted Rb's - Timbo in Oz 14:05:51 11/16/06 (0)

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