Power Bandwidth (rated power into 4 ohms): 
20 Hz to 20 kHz
(Output power typically –3 dB at 50 kHz. Amplifier protection circuits
typically mute the output signal above 40 kHz at full power.) 
Frequency Response (1 watt into 8 ohms): 
< 10 Hz to 55 kHz (+0, –3 dB) 
Distortion: 
THD, SMPTE IMD
< 0.05% @ 8Ω
< 0.10% @ 4Ω
< 0.20% @ 2Ω

SignaltoNoise Ratio: 
> 107 dB below rated power into 4 ohms 
Channel Separation: 
> 80 dB @ 1 kHz 
Damping Factor: 
> 500 (8 ohms @ 400 Hz) 
Input Impedance: 
24 kΩ balanced
12 kΩ balanced 
Input Sensitivity: 
1.23 volts (+4 dBu) for rated power into 4 ohms 
Gain: 
M•2000 31.4 dB (37.3 V/V)
M•3000 33.3 dB (46.0 V/V)
M•4000 34.4 dB (52.7 V/V) 
Maximum Input Level: 
9.75 volts (+22 dBu) 
Rise Time (8 ohms): 
< 6 μs 
Slew Rate: 
M•2000
Voltage Slew Rate 50V/μs
Current Slew Rate 25A/μs at 2Ω
HSwitch Slew Rate 1050V/μs (program dependent)
M•3000
Voltage Slew Rate 55V/μs
Current Slew Rate 27.5A/μs at 2Ω
HSwitch Slew Rate 1670V/μs (program dependent)
M•4000
Voltage Slew Rate 60V/μs
Current Slew Rate 30A/μs at 2Ω
HSwitch Slew Rate 1670V/μs (program dependent)

CMRR: 
> 34 dB, 20Hz to 20kHz 
Load Angle: 
8(±jx) time independent at 8Ω
4(±jx) time dependent, T > 6 min. at 4Ω
2(1±jx) time dependent, T > 2 min. at 2Ω 
Transient Recovery: 
< 1μs for 10 dB overdrive @ 1kHz 
Maximum Output Offset Voltage: 
±50 mV 
High Frequency Overload and Latching: 
No latch up at any frequency or level. 
High Frequency Stability: 
Unconditionally stable driving any resistive or reactive load. 
Turn On Delay: 
3 seconds 
HighPass Filter: 
150 Hz, 2ndOrder Butterworth 
LowPass Filter: 
150 Hz, 2ndOrder Butterworth 
Limiter Section: 
Complementary Positive and Negative Peak Detecting 
Indicators: 
Power ON LED (in power switch)
6 meter LEDs per channel
SIG (Signal Present), –20, –9, –6, –3, OL (Overload)
CH 1 & 2
PROTECT LEDs, SHORT LEDs, OVER TEMP LEDs 
AC Line Power: 
U.S./Canada 120VAC, 60Hz
Europe 240VAC, 50Hz
Japan 100VAC, 50/60Hz
Korea 220VAC, 60Hz
(Factory configured) 
AC Dropout Voltage: 
At approximately 65% of rated line voltage 
Physical: 
M•2000
Height 3.5 in/89 mm
Width 19.0 in/483 mm
Depth 15.7 in/398 mm
Overall Depth 17.0 in/432 mm
Weight 41 lb/18.6 kg
M•3000
Height 3.5 in/89 mm
Width 19.0 in/483 mm
Depth 18.1 in/460 mm
Overall Depth 19.5 in/494 mm
Weight 48 lb/21.8 kg
M•4000
Height 3.5 in/89 mm
Width 19.0 in/483 mm
Depth 18.1 in/460 mm
Overall Depth 19.5 in/494 mm
Weight 53 lb/24.0 kg 