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Old     (boardman74)      Join Date: Jul 2012       05-04-2016, 6:27 PM Reply   
I should be finishing up the wiring on the new flybridge stereo set up tomorrow and be ready to start tuning. Set up is:

JVC Marine KD-R85MBS Deck
PPI 900.5 Amp
Polk DB651 6.5 inboats
Polk DB1240 12 inch SVC sub in a 1.8 Cu foot box tuned to 36Hz

Inboats on channels 1-4 and the sub is on the sub channel

So the starting points I used in the past are:
inboats: filter on Hi-pass set to 90 htz running gains around 35-50%(starting at 0 and working up)

Sub: filter set to low-pass at 100htz. Gain to about 50%(starting at 0 and working up)

Amp also has a subsonic filter for the sub, where does that get set to? Also to I adjust the sub tuning for the 36hz tuned port on the box.

I have always used wet sounds stuff in the past so the stuff on this PPI is a little different to me. Any help and advice with this equipment is appreciated.
Old     (chpthril)      Join Date: Oct 2007       05-04-2016, 7:05 PM Reply   
Just note, the Hz numbers and hash marks on the PPI amps are typically inaccurate and way off.
Old     (jibsta210)      Join Date: Jul 2015       05-04-2016, 7:11 PM Reply   
save your equipment, read this/
Old     (bass10after)      Join Date: Feb 2010       05-05-2016, 6:49 AM Reply   
subsonic would be just under 36htz if thats what the box is tuned to i believe. trust tige mike when he says dont trust the dial markings. part of the reduced cost in the ppi amps is not as good of crossovers.
Old     (boardman74)      Join Date: Jul 2012       05-06-2016, 6:13 AM Reply   
If the markings are wrong or not accurate how do you adjust the filters? The gains I have set by sound to balance the music.

But with the filters how do you know if they are in the right place? I read one article that says if the hi-pass is to high it will sound "tinny". Is that correct? How do you know with the low-pass on the sub and with the subsonic?
Old     (chpthril)      Join Date: Oct 2007       05-06-2016, 5:22 PM Reply   
By time it sounds tinny, you are likely way too high.


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