Servo 120a

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Power Amplifier

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  • Single-space 19-inch rackmount servo controlled power amplifier

  • 60 watts per side at 4 ohms stereo

  • 120 watts at 8 ohms (bridged mono)

  • 1/4-inch balanced phone jack and RCA inputs

  • Bi-polar design and toroidal transformer power supply

  • Individual left and right level controls

  • 10-segment, 3-color LED meters

  • Convection-cooled design

  • Headphone jack with speaker output mute

Stereo mode Rated Output Power, per channel (@ 1 kHz)

4 ohm <0.05% THD+N60 W 

4 ohm 1% THD+N80 W 

8 ohm <0.05% THD+N50 W 

8 ohm 1% THD+N55 W 


Bridge mode Rated Output Power (@ 1 kHz)

8 ohm <0.05% THD+N120 W 

8 ohm 1% THD+N150 W 


Typical Distortion, per channel

THD+N (80 kHz LPF @ 1 kHz, rated output power)0.01% 

IMD (SMPTE 4:1, 60 Hz & 7 kHz @ rated output power)0.03% 

Signal To Noise Ratio (22 Hz - 22 kHz bandwidth @ dB below rated output power)105 dB 

Frequency Response10 Hz - 20 kHz +0, -0.5 dB, 3 Hz - 65 kHz, +0, -3.0 dB 

Input Sensitivity (Level control set to maximum / Inputs to achieve rated power)RCA: -10 dBv, 1/4" +4 dBu 

Crosstalk (adjacent channels)-75 dB, 1 kHz 

Output DC Offset Voltage¡À 50 mV, DC Servo Controlled 

Headphone Output Level400 mW (into 100 ¦¸ @ 1% THD+N) 

Dimensions17.5" x 11.5" x 1.75" / 444mm x 292mm x 44mm 

Weight15.6lb / 7kg