Audio Research SP-11

Audio Research SP-11

Hybrid Tube Preamplifier in excellent condition, light wear on the faceplates corners only with original manual. Here some information from Alex Megann. For the complete - extremly interesting - (technical) review take a look at this URL:

http://www.soton.ac.uk/~apm3/diyaudio/SP11.html

The SP-11 is one of the most complex and sophisticated preamplifiers ever released, built in two full-size rack-mount boxes with triple-regulated power supplies and three or four active devices (a 6DJ8 triode, a power MOSFET and one or two JFETs) in each amplifying stage. It appeared at the mid-point of Audio Research's experiments with hybrid circuit topologies, sitting between the more-or-less traditional valve circuit of the classic SP-10 and the almost entirely solid-state SP-9 and SP-14, the latter having only a single valve (at the input of its phono stage).

To be continued on the URL mentioned above:


We tested this unit with a Marantz 8b Amplifier and Altec Santiago Speakers. No problem if no one will buy it....

sold

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