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Old thread but what the heck. I love these little bi-amps and have repaired, restored and maintained at least a dozen. I have a pair of 771Bs. What's the issue with the non-functioning amp?

I used to work for a company that did certification testing on consumer and pro audio systems. They did work on the Performance series and I ended up with a prototype PC600 system. I recently took...

I have also used polyfill from craft stores - it doesn't shed like fiberglass and it doesn't make you itch ;)

Here is a plot of the filter network - assume an 8 ohm load and F=500 to 20000 Hz

I found these two networks in several 9846B cabinets: 391039 & 391226. They are esentially the same components and both networks appear to be HF "boost" shelving filters. Anyone have the specs on...

I'm restoring a pair of Altec 9846s - refoamed 411s, new VC for the 808A's and I'm going through the biamps (I have both 771Bs or 770s). I would like to repaint the enclosures and would like to know...

Hello, I'm looking for one of the terminals for the L40 loudspeaker. These are the locking terminals on the back of the loudspeaker. I would rather not have to butch in a pair of 4mm terminals....

Hello,

I need help with the installation of the grille cloth on the 4411 frame. I have searched the forums, and though I did find helpful threads, I need help understanding exactly how to...