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Viola Audio Laboratories Concerto Power Amplifier

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Concerto Power Amplifier

Item # : VIO-CNCRT

Sales restrictions may apply. Please contact us for pricing and ordering information.

5 year transferable warranty

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Concerto Power Amplifier

Housed in the same size billet Aluminum chassis as the Crescendo, the Concerto delivers 100W into 8 ohms and 200W into 4 ohms. Like all Viola power amplifiers the Concerto uses a choke input power supply. This reduces peak charging currents that are prevalent in capacitor input supplies. This minimizes intermodulation distortion on the power supply rails on ground returns.

Concerto Audio Design

The Concerto is a Class AB biased push-pull amplifier design. The Concerto incorporates Motorola ThermalTrak™ into the bias network. This provides fast thermal feedback information without the thermal lag of other bias topologies. A center chassis Venturi style heat sink provides cooling for the amplifier. Connections to loudspeakers are provided by a pair of WBT nextgen™ connectors per channel.


The Concerto can be connected to the Crescendo preamplifier via the CAN (Controller Area Network) connector. When this is done Concerto status information including temperature and line voltage are transmitted to the Wi-Fi remote application. This also provides synchronization of the color displays and standby modes.

Product Details
Brand Viola Audio Laboratories
Condition Notes

Sales restrictions may apply. Please contact us for pricing and ordering information.

Warranty 5 year transferable warranty
Weight (lb) 60.0000
Height (In) 3.5
Width (In) 17.52
Length/Depth (In) 15
Weight (Kg) 27.2
Height (mm) 89
Width (mm) 445
Length/Depth (mm) 381

Concerto Power Amplifier Specifications

Output Power Stereo Mode
100W into 8 ohms
20Hz to 20kHz , THD < 0.2%
200W into 4 ohms
20Hz to 20kHz , THD < 0.2%
Bridge Mode
400W into 8 ohms
600W into 4 ohms

All power figures quoted are continuous average power

Inputs 2 x XLR
Outputs 1 pair of WBT nextgen terminals
Frequency Response 10Hz to 20kHz ± 0.2dB at 1W into 8 ohms
5Hz to 100kHz, -3dB at 1W into 8 ohms
Power Bandwidth 5Hz to 100kHz +0, -3dB
SN Ratio > -90dB @ 1kHz 100W, C weighted
Dimensions 17.5’’W x 3.5’’H x 15’’D
44.5cm W x 8.9cm H x 38.1cm D
Weight 53 lbs. (24kg)

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