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FS: Threshold SA/3 Stasis Optical Bias Amp
FS: Threshold SA/3 Stasis Optical Bias Amp
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Old 11th January 2014, 01:08 AM   #1
uberchurl is offline uberchurl  United States
diyAudio Member
Join Date: Jul 2013
Location: Pasadena, California
Default FS: Threshold SA/3 Stasis Optical Bias Amp

The legendary Threshold SA/3 Stasis Optical Bias Class 'A' power amp by Nelson Pass. Most Threshold enthusiasts agree that the "SA/" models are the finest example of the Pass-era Threshold amps. It is most definitely "built like a tank"; no scratches or dents, and performs flawlessly. It includes a unique, high quality upgrade consisting of a close-coupled self-contained capacitor bank. Pause the music, drive the amp full bore and you won't hear a single sound...complete silence. Incredible soundstage from this high quality class 'A' power amplifier.

RATED OUTPUT: 50 watts/channel @.05% distortion

BANDWIDTH: -3dB at 7Hz and 100,000 Hz

SLEW RATE: greater than 50 volts per microsecond

INPUT IMPEDANCE: 75,000 ohms

OUTPUT TRANSISTOR COMPLEMENT: 14 transistors/channel

OUTPUT CURRENT CAPACITY: 16 continuous, 80 peak amperes (fuse governed)

POWER SUPPLY: 700 watt toroidal transformer, 60,000 microFarads capacitance

OUTPUT IMPEDANCE: Less than 0.03 Ohm 20Hz - 20,000 Hz


NOISE: No greater than -100dB, unweighted, referenced to rated output (input terminated in 600 ohms)

LOAD RATING: Operation is allowed into any load as permitted by power supply fuses and thermal protection.

WEIGHT: 56 lbs / 25.5 kg
DIMENSIONS: 9.6"H x 19"W x 13.125"D

Includes capacitor box, multi-pin locking cable, ac power cord, and copy of user manual.
Price is $1200 which includes packing/shipping to USA lower 48 states. For other destinations, the shipping weight is approximately 70 lbs; please contact me for a shipping estimate. For local pickup, I am located in the Pasadena/Los Angeles area.
Attached Images
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File Type: jpg sa3_2.jpg (27.3 KB, 298 views)
File Type: jpg sa3_3.jpg (11.8 KB, 296 views)
File Type: jpg sa3_4.jpg (29.8 KB, 299 views)
File Type: jpg sa3_5.jpg (20.0 KB, 299 views)
Old 16th June 2014, 03:28 PM   #2
Cal Weldon is offline Cal Weldon  Canada
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Join Date: Jan 2004
Location: Near Vancouver
FS: Threshold SA/3 Stasis Optical Bias Amp
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