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The S500 Stereo Amplifier

Static Power Consumption270 Watts On
Standby power less than 2 watts
Operating Voltage Range120/240V (Auto switching)
100V (Fixed)
Fuse1/4"x1-1/4" 15A 250V Slow Blow
Input2x XLR Input
Output1x Binding post set per channel
ControlsGain switch
Input Impedance Switch
On/Off Button
Standby button
Display Dimmer
12V Mode Switch
2x MSB 12V trigger port
Continuous Power Output (8Ω) < 1% distortion500 W
Continuous Power Output (4Ω) < 1% distortion900 W
Frequency Response (20 to 20kHz)±0.025dB
Signal to Noise (20 to 22kHz)>136dB (>140dBA)
Equivalent Input Noise (22kHz BW)0.5μV
Crosstalk @ 2kHz<-110dB
Low Gain (75Ω source impedance)16.2dB
Medium Gain (75Ω source impedance)22.2dB
High Gain (75Ω source impedance)28.2dB
Input Impedance (User Selectable)75Ω / 300Ω / 1.2kΩ
Output Impedance (20 to 20kHz)0.07Ω


Input/Gain Stage- Class-A
- Double balanced
- Impedance matched
- Fully discrete
- Independent power and transformer
Output Stage- Class-AB
- Balanced
- High bias
- Current gain only

Chassis Dimensions

Width:15 in (381 mm)
Depth:23.25 in (590 mm)
Height:10.5 in (267 mm) Without Feet
11 in (279 mm) With Feet
Weight:135 lbs (61.25 kg)
Product Feet:M6X1 Thread
3 or 4 Foot Configuration

Shipping Dimensions

Width:23 in (585 mm)
Depth:35 in (889 mm)
Height:21 in (534 mm)
Weight:194 lbs (88 kg)

Included Accessories

User Manual
IEC C19 Power Cord

The MSB S500 Stereo Amplifier

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