How did you resolve low freq response problem?

Posted by Shawn Fogg [IP: 165.87.14.11] on October 26, 1999 at 21:23:58
Using Mozilla/4.61 [en] (OS/2; U):

In Reply to: How did you resolve low freq response problem? posted by Joe on October 25, 1999 at 21:04:21:

Joe,

For a test disc Stereophile Test CD 1 would work for you. It has 1/3 octave warble tones at 20,25,31.5,40,50,63,80,100,125,160,200 a 1kHz.

"What corrections do I have to apply?"

If you are looking for your flat frequency response you need to account for the 'C' Weighting the meter applies. To do this at the following frequencies ADD the amount show below to your measured response to get flat response.

20hz = 6.2db
25hz = 4.4db
31.5hz = 3db
30hz = 2db
50hz = 1.3db
63hz = 0.8db
80hz = 0.5db
100hz = 0.3db
125hz = 0.2db
160hz = 0.1db
200-1250hz is flat

Also you should keep in mind that the RS meter isn't all that accurate down low so don't go nuts when plotting your response.

Using the tones and the meter should help you play with your subs positioning to get a fairly smooth response... but it is time consuming.

Good luck,

Shawn

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