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I rendered mine passive! On my project/setup I ended up bypassing the Penta 2 amps altogether but kept I the unhooked-up amp attached to the tower. When I got them, I had one tower that worked sort of fine and one that never worked, sputtering sometimes, but always going straight to RED LIGHT. My connection was Beocenter 9000 preamp out RCA to Penta RCA. Switching the wires always produced that one speaker not working. After replacing all the midrange surrounds and accepting the fact that the doors on both the amps were not ever going to stay shut, but with no DIN speaker connection (so no display), I went the preamp out to a separate AMP route. Beocenter 9000 preamp out to a Sony DA5 ES.
This video was SUPER helpful. https://youtu.be/Uh2edGVsGto?si=eDbuklbv1WJLBKbc
After taking the base and Penta AMPS off, I undid the plain speaker wire that extends up into the tower and fished flat Monster speaker wiring up past the side of the amp through the inside of the base, trying my patience quite mightily. I reconnected the rods for the electrically disconnected amp AND reconnected the base after connecting the flat wire to the terminals on the speaker itself and then connected it to the Sony’s main speaker output. Getting those smaller bolts the video mentioned and leaving the amp off seems like a WAY easier way to go.
I get that the Penta amp was “matched” to the speaker array with crossovers and whatnot, but the Sony’s outputs (110 watts per channel, ANALOG direct) It’s legit too loud and too startlingly CLEAR to play above halfway. It’s the best non tube setup I’ve ever heard, even on cassette. I was pretty lucky to get a Beolink 1000 remote and a Beogram 9000 to go along with the rest of the setup. Everything (besides the Penta amps) acts just like new. The Beocenter’s CD player didn’t want to work initially but it somehow self-healed, works fine, and I didn’t ask any questions.
I may try the setup with a semi-lower powered Yamaha RX-396 with it’s 50 watts per channel, to see if I can discern any difference, but I haven’t done that yet.
Location: MARYLAND
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