Bel Canto eVo 4 power amplifier

Can be used as a high power
stereo amp with 400W/8 Ohms, 600W/4 Ohms or as a 4 channel amp with 120W/8
Ohms, 240W/4 Ohms. Can also be used as a 3 channel amp where one stereo board
powers a pair of satellites and the other stereo board (in bridged mono) powers
a sub.

The eVo Digital Output Stage and Digital Power Processor

The Bel Canto Design eVo
digital output stage is of unique simplicity. The output uses 2 N channel
MOSFET switches switching between the power supply rails. These switches turn
on and off within 30 billionths of a second and provide an onresistance path to
the supplies of a few thousandths of an ohm. These switches switch alternately
between the supplies at a rate over 600,000 cycles per second (600 kHz). When
no audio signal is present, the ratio between the time at the positive supply
and the negative is balanced to provide no audio frequency output. The switching
stage is isolated from the loudspeaker by a single LC filter stage. This 80kHz
second order filter is used to reject high frequency energy and maintain linear
phase response. Furthermore, the digital power processor adds small levels of
high frequency dither to insure that an inherently linear output stage
characteristic is maintained from very low to very high output levels. The
audio frequency information modulates the output stage by changing the time
relationship between the positive and negative supply rails. The critical
timing information is controlled by the digital power processor and the
effective switching frequency is changed over a 200 kHz to 1500 kHz range. This
spreads the digital energy created by the amplifier over a wide bandwidth,
greatly reducing the energy at any one frequency. This permits using a simple
LC filter to remove the high frequency energy and maintains excellent phase
response. Feedback is taken before the LC filter and fed back to the digital
power processor. This feedback is used to insure that any variations in the
switching speed of each output device are compensated for, optimizing the
linearity of the output stage.

Specifications

Output power:

4 Ch. 120W/ch @ 8 Ohms, 240W/ch
@ 4 Ohms, Gain 23dB 

2 Ch. 400W/ch @ 8 Ohms,
600W/ch @ 4 Ohms, Gain 29dB

Bandwidth 1Hz -80KHz +/-3dB

Input Impedance 100k/200k
Bal 

Inputs XLR & RCA 

Outputs 4 pr. 5-Way

Idle Power Draw 30
Watts

Dimensions W x D x H 17.5
in x 18.5 in x 4.5 in

Weight 40 lbs

This unit has been verified
to be in perfect working condition and includes original packaging,
documentation, and accessories as shown.
Serial# E4-04001m
Technician notes: "Tested all inputs and outputs successfully. Accessories: Manual and power cable"
Because we do not sell this brand, it is offered solely on an as-is basis.