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In Reply to: RE: PAS3 - Tone Controls Bypassed - Need to connect up to a 50k Ohm Active Crossover posted by aguaazul@gmail.com on February 03, 2014 at 22:42:38
AFAIK, with the x-mod done to the PAS (including the 1.0uF capacitor at the output), the minimum input impedance it would need to see is 100K.
Do you have the 1.0uF cap, or were the tone controls just bypassed without it being added? If you don't have the 1.0uF cap, you might even have a small DC offset at the output of the PAS. Worth checking.
You can try it, and if the crossover has a level control, you might be able to compensate for the bass rolloff.
Follow Ups:
Thanks for the quick reply. Well Joe Curcio did his magic on this PAS3. I'll look to see if that cap is i there, but I think it was just bypassed using he bypass method, not sure if I had the x-mod done. Is there any way with some parallel resistor math magic, could I get the minimum input impedance down to 50K?
There is no level control in the x-over.
Randall Nerison
You could ask Joe about a further adjustment to accommodate the input impedance of your crossover - either Joe or member "GP49"
Thanks. I read GP49's comments here: (Safe Short URL) :
http://alturl.com/spvqp
Regarding how to get the impedance right for a 100k ohm load.
My math takes me to believe that a 10m ohm resistor across the RCA output jack(s) would get me to almost 50k Ohms. The load that will make the PAS3 happy.
I've PM'd both of them to get their thoughts.
Randall Nerison
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