Hi-Fi
amplifiers for sale
Located in
It is monoblocks, 25 W each. My own design.
Only two units were in production. Output: PP EL34. Input –
ECC82 and ECC83. All tubes – TESLA and TUNGSRAM old stock.
Output
transformers – from studio monitor amplifiers circa mid 60's, as well as plate
power transformer; filament is provided by separate transformer. Optimal load
now is about 15 ohm, but I use them with 8 ohm speakers. In this case they have
about 20% lack of power – it becomes 20 W – and it is not listenable. The
linearity doesn't become bad too. It is easy to upgrade them to 35 - 40 W @ 15
ohm load by increasing of plate voltage (from 350 to 420 V). Power transformer
makes it possible to do it. But it sounds good without any modifications,
especially if it is in use with sensitive speakers.
I have used amps like these (these are better) in
experiments on emotional effect of music in Sankt-Petersburg
university.
Weight – 14 kg each.
Front view
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Back view
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Power
cable is quite thin, but it will beat any common cable; only $100 worth MIT or
something like that can successively replace it.
Under
cover you can see all tubes and 2 of three transformers: smaller – output;
larger – plate voltage – about 200W. Filament voltage is supplied by separate toroidal transformer, located under chassis.
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Without cover
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Bottom view
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Conical
feet with sharp tips are made of hard steel.