Bi-amp / Active Crossover using Gainclone

31/12/07 - Final setup using 4 LM3875 gainclones to drive a pair of two-ways speaker -- that's one amp per driver! It sounds so transparent like glass.



30/12/07 - Managed to cram 4 channels of 3875 amps into this little box. It's a two-tier setup. The whole system now sounds really great but I'm having problems with hum on the second pair of amp (pulling hair...). Also I don't know why the new pair runs hotter even though they are exact same design.



28/12/07 - Completed active crossover setup. Now I need a second pair of gainclones to make sure all frequency matched!


The active crossover is based on Rod Elliot design 'P09' with cutover freq. of 3.5kHz. Calculated C=39nF, R=820R

2 comments:

Gio said...

Nice use of a breadboard. What circuit did you use?

ariel & andrew said...

The circuit is based on Rod Elliot's design "P09": http://sound.westhost.com/project09.htm