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Viola Audio Laboratories Solo Mono Preamplifier

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Solo Mono Preamplifier

Item # : VIO-SOLO

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

5 year transferable warranty

Solo Mono Preamplifier

The Solo preamplifier is comprised of separate chassis and power supplies for true monaural operation. The Solo uses discrete Class A circuitry and is fully balanced throughout the signal path. Like all Viola products the Solo input impedance is 1 million Ohms. This high input impedance provides a light load to source output stages which usually consist of amplifiers with limited drive current. Also the fully balanced topology provides maximum rejection of common noise. The Solo also features a choke input power supply. This helps avoid high peak charging currents that occur in capacitor input power supplies that can contaminate power supply and ground returns.


The Solo is expandable with up to 32 slave units controlled by a master. The master sends volume, balance; mute, remote trigger and input select commands to all slave units connected to the network for multichannel operation. Pairs and single units can be assigned to a group. This allows independent volume and balance control for up to 6 pairs of Solo.

Baton Remote Control

The Baton provides remote operation of input switching, volume, balance, mute and the remote trigger control. The Baton will also control the volume and balance of groups of preamplifiers, so you can control the volume of center and surround channels independently.

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) 17.0000
Height (In) 2.09
Width (In) 17.6
Length/Depth (In) 19.02
Weight (Kg) 7.7
Height (mm) 53
Width (mm) 447
Length/Depth (mm) 483

Solo Mono Preamplifier Specifications

Inputs 3 XLR balanced 3 RCA unbalanced
Outputs 1 RCA
1 Fixed (Tape)
Input Impedance 1 M Ohms
Output Impedance Main Out
Tape Out
100 Ohms
600 Ohms
Maximum Gain 16dB
Maximum Output 15.5Vrms Balanced
7.75Vrms Single Ended
Frequency Response 20Hz to 20kHz ± 0.2dB
IMD < 0.005% @ 1V input
THD < 0.01 % @ 20kHz, 1v input
Noise > -90dBv 10Hz - 22 kHz
Power Consumption Approximately 22W
Dimensions Preamplifier
Power Supply
44.7cm W x 5.3cm H x 48.3cm D
22.3cm W x 9.1cm H x 40.6cm D
Power Supply
7.7 kg
7.3 kg

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