Manual
860A Dual-Mono Power Amplifier 
____________________________________________________________________________________ 
13 
Specifications
Configuration  ................................................  Dual Mono 
Power Supply Transformers ............................  2 x 0.5kVA 
Power Supply Capacitance  .............................  121,200µF 
Class Of Operation  ........................................  A/AB 
Design ...........................................................  Fully Balanced Differential to output stage 
Input Impedance  ..........................................  47,500Ω 
Input Sensitivity  ............................................  1100mV 
Output Device Type  .......................................  Bipolars - 12 per channel 
Output Power at 8Ω  ......................................  200 Watts per channel 
Output Power at 4Ω  .....................................  400 Watts per channel 
Output Power – Bridged Mono at 8Ω ...............  800 Watts 
Frequency Response ......................................  10Hz - 200kHz +0/-3dB 
Output Impedance  ........................................  0.01Ω 
Damping Factor (static)  ................................  800 
Gain .............................................................  31dB 
Signal-to-noise Ratio  .....................................  > 106dB @ full power 
Maximum Output Voltage ...............................  40 Volts 
Slew Rate  .....................................................  42V/µs 
Maximum Current – Peak ...............................  48 amperes 
Maximum Current – Continuous ......................  22 amperes 
Crosstalk @ 1kHz  ..........................................  -105dB 
Intermodulation Distortion  .............................  Unmeasureable 
THD (20Hz - 20kHz @ 1 watt)  .......................  < 0.015 % 
THD (20Hz - 20kHz @ 200 watts) ..................  < 0.04 % 
Power Consumption @ idle .............................  55 Watts 
AC Power Requirements .................................  120V / 60Hz or 240V / 50Hz 
Shipping Weight ............................................  90 lbs / 40 Kgs 
Dimensions (W x H x D, inches) .....................  18.75  x 7.5 x 17.5 
Balanced Pin Assignment: 
 Pin 1...........................  Ground 
 Pin 2...........................  Positive 
  Pin 3 ..........................  Negative 
12 Volt Trigger:  Logic...........................  Direct (0V off, 12V on) 
 Jack............................  3.5mm microphone jack 
  Input Impedance .........  1kΩ 
  Current Consumption ...  12mA 
NOTE: If you require the RS-232 codes for your 860A, please visit the "Contact Us" page 
and complete the "Information request" form on our website at www.simaudio.com. 
 Fuse Replacement:  For the 120V version use a 8A fast blow  (3AG size). 
For the 230V version use a 4A fast blow  (3AG size).










