B&K ST140 Stereo Amplifier Legendary Tubelike Sound! Photo 1773742

Sidebar 3: Specifications Description: Solid-state stereo power amplifier. Output power: 70Wpc into 8 ohms, 20Hz-20kHz (1984); 105Wpc into 8 ohms (20.2dBW) 105W into 4 ohms (17.2dBW), both continuous power, 5Hz-45kHz, with 0.09% THD (1989). Dynamic headroom: 3.2 dB (1984). Frequency response: 3Hz-70kHz ±3dB (1984). Input impedance: 24.3k ohms (1989). Sensitivity: 1.1V for full output (1984.. Guy Lemcoe reviewed the B&K ST-140 in December 1989 (Vol.12 No.12): This $498 amplifier (footnote 1) has been around for quite a while, the first review—by the one and only JGH—occurring over five years ago. He liked it, as did Sam Tellig, the Audio Cheapskate/Anarchist (Vol.7 No.4, Vol.8 No.8, Vol.10 No.7, Vol.12 No.4). It incorporates class-A pre-driver circuitry driving a class-AB.

For sale is a early/first version B&K ST-140 stereo 70WPC power amplifier in fantastic cosmetic condition. This is the most desirable first version with the killer single 2SJ/2SK output transistor pairs. This is a no frills, no BS amplifier. Power switch, input RCA jacks and 5 way binding pos.. The B&K ST-140 and the Adcom amps, at the time, were the darling budget amps of Stereophile, odd as they are two totally opposite, opposing sounds. While the excellent Adcom was crisp, clean, sharp and some may say a touch bright, the B&K was warm, fluid, cozy. The only issue found with the ST-140 was it's slight softness in the bass regions- a little more "oomph" there, and the amp would have.