Viola Audio Labs Crescendo/Concerto (Mono Pair) preamplifier/amplifier combination. Units are in very good physical and functional condition with remote control/IR receiver, bridging cable kit and power cords. There are a few very small nicks on the top fins, but overall quite well conditioned. Units sold for $22,000.00 each or $66,000.00 for the ensemble. Superb audio performance and excellent build quality. No original boxes or packing. 

 The Absolute Sound Conclusion -

"The Viola Audio Laboratories Crescendo and Concerto are simply stunning musically, and among the best electronics I’ve heard. The transparency, the sense they convey of nothing coming between you and the music, their sensational treble resolution without a touch of the analytical, their wide dynamic expression, and their absolutely sensational bass vault the Viola electronics to world- class status."

SPECS & PRICING

Inputs: Three balanced on XLR jacks, three unbalanced on RCA jacks, one SPDIF, one USB
Outputs: One balanced on XLR jacks, one unbalanced on RCA jacks, tape-out on RCA jacks
Network connection: Wi-Fi
Viola Local Network (link bus): CAT-5
Gain: 16dB or 26dB (switchable)
Supplied accessories: Apple iTouch, pre-configured Wi-Fi router, Ethernet cables
Dimensions: 17.5″ x 3.5″ x 15″
Weight: 25 lbs.
Price: $22,000

Concerto Stereo Power Amplifier
Power output: 100Wpc into 8 ohms, 200Wpc into 4 ohms
Inputs: One balanced on XLR jacks, one unbalanced on RCA jacks
Viola Local Network (link bus): CAT-5
Dimensions: 17.5″ x 3.5″ x 15″
Weight: 53 lbs.
Price: $22,000