Singular as subwoofer: low pass filter design (Singular)
The project is to use a dedicated Tripath based amp for a Singular with Fostex FW208N woofer. The singular will be used as subwoofer in the range of 35hz~200hz.
The idea is to modify the low pass filter present at the output of the Tripath amp to get a frequency cut at 200hz.
The low pass filter in the T-amp is a second order 107kHz LC filter with a L=10uH and C=0.22uF. The T-amp has too a Zobel RC filter with R=6.2ohm/2W and
C=0.22uF.
Using some calculators on line I got a 2nd order 200hz LC filter with L=9mH and C=70uF. I couldn't calculate the Zobel filter because there is not the "Le" (bobbin inductance?) in Fostex datasheet.
I've to confess I don't understand much about filters, can you help?
P.S.
T-amps work better with copper foil coils used in Xovers.
Complete thread:
- Singular as subwoofer: low pass filter design - Giovanni, 2007-03-16, 13:47
![[*]](themes/default/images/complete_thread.png "Open whole thread")
- Singular as subwoofer: low pass filter design - Bert, 2007-03-16, 15:07
- Singular as subwoofer: low pass filter design - Giovanni, 2007-03-16, 15:18
- Here is a link to give you an idea... - Bert, 2007-03-16, 15:31
- Here is a link to give you an idea... - Giovanni, 2007-03-16, 17:29
- Knock yourself out... - Bert, 2007-03-16, 18:03
- Here is a link to give you an idea... - Giovanni, 2007-03-16, 17:29
- Here is a link to give you an idea... - Bert, 2007-03-16, 15:31
- Singular as subwoofer: low pass filter design - Giovanni, 2007-03-16, 15:18
- Singular as subwoofer: low pass filter design - Bert, 2007-03-16, 15:07