©2001 Marchand Electronics Inc. PO Box 473 Webster NY 14580 (585)872 0980 www.marchandelec.com
2
Features
The MB401 is a mono MOSFET power amplifier for high quality audio reproduction. The construction is all heavy-
duty. The amplifier is housed in an aluminum chassis. Heatsinks on the rear of the unit provide the cooling. Inside
is a toroidal power transformer and power supply with large storage capacitors. The amplifier is designed for use
with a 4 or 8 Ohm load, but it is stable with any output load.
.
XLR Balanced inputs
Balanced inputs for high noise immunity
RCA
Standard line level inputs
Selector switch
Switch between balanced and standard inputs
Binding Posts
Connection for the loudspeakers
Fuse
Protects the amplifier in case of overload
Thermal cutout
Protects the amplifier in case it gets too hot
Power entry connector
Standard line cord for 120V AC 1-phase operation.
Specifications.
Frequency response:
20Hz - 20KHz +/- 1 dB
Harmonic Distortion @ 1KHz, 10W
0.02% or better
Sensitivity
1.28VRMS
Voltage gain
32dB(40X)
Input impedance (RCA)
500 KOhm
Short circuit output current
20 A peak, 15A Continuous
Output load
8 or 4 Ohm, stable with any load
Max power output
500W into 4 Ohm, 300W into 8 Ohm
Power requirement
120VAC, 6A fuse; 240 VAC available
Construction
All metal cabinet, black with white legend
Dimensions:
17” x3.5” x 11” (WxHxD)
Weight:
22 lbs
PR41 Preamplifier
Inputs
Left
Right
In in in in in in out
Full Range
MB401 Power Amplifier
In
Out
MB401 Power Amplifier
In
Out
Figure 1 Typical Sound System
