Great sounding little footprint EL34 amplifier by the Sonic Frontiers folks. Easily beat dynaco and all chinese competitors. The ST-40 pushed 40 watts of EL34 yumminess, has controls to individually bias each output tube, is quiet and works just as it should.This was recently checked by Bill Thalman (Ex Conrad Johnson engineer)- guaranteed to work fine!! Here are the specifications:
The ST-40 uses a single 12AX7/ECC83 in the input/driver stage, which feeds a pair of 12AU7/ECC82 tubes (one per side). The output tubes are EL34s. The kit comes with MULLARD EL34 tubes, which many people consider the best of new EL34s out there. The rated power is 40Wpc into either 4 or 8 ohms (when assembling the kit you have the option of using a 4-, 8- or 16-ohm tap on the transformer), with 1% THD happening at 55W. Input sensitivity is 1.3 volts, while input impedance is 100k ohms. Buyer to pay actual fedex ground shipping charges. If using paypal, add 3% to total. This is a really nice amp- it will drive most home speakers, looks great too. Thanks for looking.
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