Selling my B&K Components 2 channel amplifier. I used this as a backup. Excellent working condition & I don't see any real blemished on the unit. Rated due to age alone. If it were newer, I'd rate it a 9+.
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From the manual:
"The ST2140 utilizes high quality electronic circuitry to achieve an environment wherein a detailed, transparent, and highly musical sound can be realized. The high quality parts complement include state-of-the-art solid state devices, 1% metal film resistors, computer grade electrolytic power supply capacitors, and a high capacity toroidal transformer.
The ST2140 operates class A predriver and AB high current MOSFET power output stages. It is capable of reproducing the most demanding audio signals at rated power levels.
Features
Toroidal Transformers - Efficient high current transformer for improved dynamics.
Discrete Circuitry - More accurate and three dimensional reproduction of source material.
Class A Predriver - Improves low level detail for smoother, more musical sound.
AB MOSFET Output Stage - For efficient and linear power delivery.
Limited Protection - Provides short term protection from accidental shorting of output devices and protection from thermal overload.
Gold Plated Connectors - Improve connections for better sound and minimized signal loss and degradation.
1% Metal Film Resistors - Low noise resistors for better sound and a greater degree of repeatability.
High Current - Ability to reproduce demanding recordings.
Computer Grade Capacitors - Large capacity computer grade electrolytic capacitors for extended low frequency control and improved dynamics.
ST2140 SPECIFICATIONS:
Power rating: 8 ohms 140 watts @ 1 kHz / 4 ohms 185 watts @ 1 kHz
Frequency response: 5 Hz - 45 kHz
Input sensitivity: 1.2 Volts
THD (S+N): 0.09 % @ 1 kHz
Input impedance: 33.2 k ohms
Damping factor: 100
Current (peak to peak): 30 Amps
Slew rate: 14 V / µsec
Dynamic headroom: 1.4 dB
S/N (A-weighted): 95 dB
Voltage gain: 28
Line voltage: 120/220/240 VAC switchable
Dimensions: (O.A.) 17"(w) X 15.5"(d) X 5.75"(h)
Weight: 31 lbs
Power consumption: 450 watts max / 4.6 Amps max current draw / 40 watts @ no input
Replacement fuses: Line - 8 Amp/250 Volt Slow Blow / Rails - 4 Amp/250 Volt Slow Blow
