It's been a long time since I posted here and I hope I'm not breaking a rule.
I have some unpopulated boards I made with a friend back in 2008 that I thought maybe some could make use of. I need to actually get a count of how many I have but there's a small quantity. Maybe 10 or 20.
They're setup to biamp a single speaker so there's four LM3886's to drive a woofer and then a single LM3886 to drive a tweeter.
They also have an optional crossover which, I think is a linkwitz-riley style and there's both a 12dB and 24dB. If that's not wanted there's pads for an RCA input jack directly into each amp.
I used a pair of these for many years until I finally gave them to a friend a few years ago. As far as I know, they're still working.
The board only has one modification which is I had to add a capacitor to the single LM3886 circuit, I think in the feedback loop to drop the DC offset as I was using it to directly drive a tweeter. The four LM3886's with the so called "servos" seemed to work beautifully on the two I built.
They were originally intended to be bolted onto the original rear panels of powdered advent speakers, but I also had plans to use them as stand alone amplifiers as well, it just never happened.
Anyone interested?
I have some unpopulated boards I made with a friend back in 2008 that I thought maybe some could make use of. I need to actually get a count of how many I have but there's a small quantity. Maybe 10 or 20.
They're setup to biamp a single speaker so there's four LM3886's to drive a woofer and then a single LM3886 to drive a tweeter.
They also have an optional crossover which, I think is a linkwitz-riley style and there's both a 12dB and 24dB. If that's not wanted there's pads for an RCA input jack directly into each amp.
I used a pair of these for many years until I finally gave them to a friend a few years ago. As far as I know, they're still working.
The board only has one modification which is I had to add a capacitor to the single LM3886 circuit, I think in the feedback loop to drop the DC offset as I was using it to directly drive a tweeter. The four LM3886's with the so called "servos" seemed to work beautifully on the two I built.
They were originally intended to be bolted onto the original rear panels of powdered advent speakers, but I also had plans to use them as stand alone amplifiers as well, it just never happened.
Anyone interested?
