Hi all,
I have been following this echo for some time now (yes, all the way from 
Sydney!) with increasing frustration at the car audio vs home audio debate (I 
enjoy both).  In a vain attempt to distract everyone with a question,  I was 
wondering if anyone could help answer the following about my home theatre set 
up.
1.  I have a pair of small 2 way vented speakers as my mains in my home set 
up and a single sealed 12inch sub running via a small dedicated amp from the 
low pass output of the Yamaha Pro Logic decoder (VSX1050).  Even though the 
main speakers are not particularly "bass heavy" do I need to run some sort of 
high pass filter on them to prevent interference from the sub?  If so, how?
2.  The lowpass output of the decoder has an Fc of 400HZ and there are lots 
of directional clues coming from the sub - what is the best Fc to use and how 
do I do this  - at line level (before the amp) or at speaker level?
3.  I want to replace the dedicated amp I have with one built into the sub 
box itself - does anyone have a good cheap amp design (about 100Watts) I can 
work with?  It seems the power supply requirements are more expensive than 
the active components on most of the kits I have seen.  A decent 200VA 
transformer runs to about $80 here.
4.  Lastly (is this off topic Bonnie?) How do the commercial sub 
manufacturers get their subs to turn off after 10 minutes or so of 
inactivity.  I keep forgetting to turn mine off and its driving me nuts!
Thanks in advance.
Marc Bamford
Sydney, Australia
mbamford@aesprodata.com.au
... Golden Rule: He who has the gold, makes the rules.
--- Ezycom V1.20 03fa003d
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