Up for sale is a pair of 1625 mono block amps. These will provide around 110 to 120 watts from each mono amp. The front end tubes are 6BL7 tubes (one for gain, and one phase splitter). The 1625 tube is a 12 volt version of the 807, which is an excellent tube for audio. The 1625 tubes were made during the early and mid 40's, when the tube quality was pretty high. Best of all, they are reasonably priced. They are pretty rugged to boot.
I run the bias for each tube at 30 ma, but the tube can be biased up to 40 ma safely. Together, with the Thomas Mayer clone preamp (also offered up for sale), this amp sounds excellent. The output stage is configured for pentode, which I have found to be a better option over ultra-linear. The transformers were made by Heyboer, and the choke is NOS. The output transformer is set at 4 ohms, which makes it compatible with more speakers. The resistors are 1 watt PRP, and the coupling caps are Mundorf Silver/Gold. This combo sounds excellent together.
Will provide a spare set of tubes with purchase. The tubes installed have fairly low hours on them.
Reason for sale: I have two sets of tube equipment, and only can use one set at a time. This set is likely more desirable to a potential owner.
Asking 1200.00 . Prefer local pickup in central FL, but can ship at owners expense. Also selling 6AH4 preamp, and will provide price break if both units purchased. The 6AH4 preamp matches very well with the 1625 power amp.
