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Love those old three meter Variacs. I’ve been casually looking for one to restore and use to replace my current Chinese junk.

Very clean. Not bad for an amp previously moded by someone else. To be honest, most amps with home gamer mods are downright scary.

Positive and Negative rail fuses like a 700. I’m a little curious what the interior looks like.

I view cables as a final refinement or tweak to an overall audio “system” (power conditioner, source, pre, amp, speakers and placement, room treatment, cables). Once you have carefully selected compatible system components based on functionality and price, choosing a well engineered cable based...

Congrats, that’s a fine looking cable. Although cables within the audio world can be a very controversial topic and somewhat dependent on your specific equipment, I have experienced audible improvements with similar cables (same connector shells and braided construction). I would have tried...

My experience is yes. The TV remote is able to also control the soundbar, Roku, and Apple TV.

I went down this path last year when updating from a 20 year old Pioneer Elite plasma 55' monitor to a new Samsung S95C OLED TV and Q990C soundbar. This setup replace the TV and high end 5.1 channel surround system in my main living room without compromise and a significant wife acceptance...

All grounds should terminate at the bulk capacitor bus bar (star ground).

Typical for the voltage to decay once the amp is assembled. The control board linear regulators provide a load and discharge the main bulk caps, along with output bias current.

What speaker wires were used in mono Vs bi-amp configs?

See below for answers to some of your questions: The Backplane Kit is described as requiring “very advanced skill levels and more sophisticated assembly and test equipment to be successful.” Based on my background that I described above, should I be tackling this part of the upgrade? I have the...

Here is a good article from Benchmark regarding cable geometry and its benefits: Star-Quad Cable

Bob, I would call Benchmark directly to discuss your setup and recommendations based on the AHB2 capability. They have been very responsive and clarified all my questions with excellent level of detail. I now run a full Benchmark stack based on my experience with this US based engineering...

I recommend running one amp per speaker to start, but don’t know enough about the rest of his system or crossover options.

I can speak first hand to the Benchmark AHB2 amp performance. They are excellent amps and I find them very detailed, musical, and accurate. Current system configuration for reference in above statement: - Benchmark LA4 preamp - Benchmark DAC3 - 2X Benchmark AHB2 amps - Aurender N200 streamer -...

May not be the only thing men want, but if it’s attached to four wheels, it’s definitely high in the list…

Very nice work. The barrier strip connectors look great.

That is quite an impressive undertaking George. Should be a great sense of accomplishment when it works after completion.

I can help you out on options for getting both amps fully functional.