I got these from a dealer in a trade recently.They were demos with very light hours on them. Still under warranty. They put out a very robust 10 watts per side and sound magnificent,as you would expect from a single ended design...From the website:
"The Single-Ended- monoblocks E1 are built in pursuit of a goal that is common to all VALVET amplifiers: the transmission of music free from artefact or manipulation, music that stimulates the senses!
A simple but well-thought-out circuit, short signal paths and the best, reliable components guarantee that your favourite music reaches you directly, thus producing long-term pleasure and satisfaction!
These little monoblocks deliver 10 watts into 8 Ohms. At first glance this appears to be a bit stingy, but rest assured that these amplifiers are quite cable of delivering the goods even when connected to speakers with 89 dB efficiency.
The power amplifiers operate in Single-Ended- Class-A mode, with only one transistor in the output stage. We believe that the common practice to employ several transistors in parallel required to produce a higher output is detrimental to the sound quality.
For those interested in technical details: ultra-stabile power supply (80 VA torodial transformer; >20000 µF filtering with 8 high-grade capacitors), extremely short signal paths.
Connections: massive chinch input socket, input imdedance 50 kOhm massive binding posts for speaker cable (plugs or spades) power socket (allows for experiments with different power cables)
Amplification: 10 watts into 8 Ohms
Dimensions: 120 x 60 x 350, W x H x D, in [mm]
Case: black anodised, solid extruded aluminium
The sound: neutral, balanced, very musical and simply right "
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See my feedback and buy with confidence!