Whilst at MLAS, Colangelo was responsible for the design of the ML-1, ML-2, ML-3, ML-4, ML-5, ML-6, ML-6A, ML-7, ML-7A, ML-8, ML-9, ML-10, ML-11 and ML-12 products. At Cello, Colangelo and Jayson designed among other products the Audio Suite, Audio Palette, Encore preamplifiers, Performance amplifiers, RDAC D/A converter and the Stradivarius speaker line. They have therefore been responsible for some of the most important high-end audio products produced the last twenty years, which gives them the most consistent success record of any design team in the industry.

Their objective with Viola Labs is to design products that are sonically neutral, as they believe that only through sonic neutrality can the listener truly be drawn into the music and experience the essential emotion within the music.

Taking their earlier work at Cello as a baseline and by paying meticulous attention to all aspects of the manufacturing process from design, through build and test, to final inspection and packing, they are producing a product of the highest possible quality that will maintain its performance and give great pleasure to the owner over a life time of use.

The present line-up comprises:

Reference Series

Spirito Reference Pre-amplifier

Bravo Reference Power Amplifier

Classic Series

Cadenza Pre-amplifier

Symphony Power Amplifier

Future high-end products from Viola will include mono-block power amplifiers, an active crossover and a phono amplifier.

The Cello products were always popular in Japan and the Viola line has been even more enthusiastically received. The Spirito and Bravo have received several awards in the Japanese high-end magazine Stereo Sound (shown left). Colangelo and Jayson's work at MLAS and Cello also received numerous "State of the Art" and "Component of the Year" awards from this influential magazine.

At the Japanese High End Audio Show last year the Spirito and Bravo enabled Viola Products to receive the "Best Sound" award. Viola products also received "Best Sound" awards last year at shows in Thailand and Beijing.