Threshold model s/300 stasis linear state power amplifier with optical bias for sale. overall feed back free. as close to brand new out of the box as you will find. notice the jet black heat sinks. was bench tested and way more powerful then 150 watts per channel. double downs with halving of impedance of the loud speaker. 150 watts per channel at 8 ohms, 300 watts per channel at 4 ohms, etc. etc. was my reference amplifier for years. only amps that beat it are my 15 TIMES more expensive mono block amplifiers. comes with stock power cord, but I'd use a reference power cord to get the best out of the amplifier. buyer pays paypal if used, shipping and insurance. U.S.A. SALES ONLY, LOWER 48 STATES ONLY, NO OVER SEAS OR CANADA EITHER. CHECK MY REVIEWS OF SALES. been an audiophile for 52 years. one of the best solid state amps available today. deep, tight, low bass, tube like mid range, extended highs but not harsh at all. extremely musical amplifier. probably the most musical solid state amp of all times. will over box for safe delivery. near mint condition. for a grand total of $1350.00 I'll pay shipping and pay pal and audiogon fees to all the 48 states only. no over seas or Canada. this unit is in impeccable condition inside and out, and works and sounds fantastic. unit has no issues. extremely enjoyable to listen to music.