Help needed: Active XO - Subwoofer

AVForums

Help Support AVForums:

This site may earn a commission from merchant affiliate links, including eBay, Amazon, and others.

JimGore

AVForums Grandmaster
*
Joined
Jul 8, 2005
Messages
4,488
Reaction score
32
Location
Jhb
Hi,

I need some help please.  My dad has some really old AV amp with a subwoofer pre-out.  Unfortunately there is no crossover on it - it lets the full signal through.  I suppose they were thinking the XO would be on the subwoofer itself.

I need a 150Hz LR4 lowpass crossover to put between the receiver and the power amp driving the sub (Behringer A500).  The way I see it, there are 2 options:
1.  DIY
2.  Buy one of those R400 active crossovers they use in cars.  Not sure it these are LR4 tho.

To be honest, I would prefer the DIY option, but don't know how to figure out the circuit & componets.  Can anyone assist me with a circuit diagram or point me in the right direction please?

Thanks,
Ian.
 
Top