DAVID David, a very compact acoustic instrument combo amplifier. Featuring the same high attention to quality and sound paid to his "big brother" UNICO, David is perfect for the artist requiring only two input channels. From preamplifiers to loudspeakers, all components were selected for their natural and accurate response. Two power amps with an active crossover supply 50 watts to the 6" woofer and 30 watts to the 1" dome tweeter. The result is velvety, clear harmonics with a controlled, strong low end (down to 40 Hz). The technology of biamplification produces a very transparent sound as well a providing maximum efficiency by properly matching amplifiers to loudspeakers. In addition, each power amplifier features limiter circuitry to deliver secure speaker protection. Amplifiers are built with bipolar transistors (no MOS-FET) and are powered by a robust, traditional power supply (toroidial transformer). David's innovative CLASS-A circuitry and built-in analog spring reverberation deliver the warm, smooth and musical sound that acoustic musicians have been seeking. Whether your instrument is guitar or violin, mandolin or cello, listen to your playing through David. You'll be amazed!  CONSTRUCTION Bass Reflex 6" Woofer 1" dome tweeter POWER OUTPUT 80W RMS, Bi-amplified FREQ. RESPONSE 40Hz to 22KHz POWER SUPPLY 220Vac 50Hz 7 115Vac 60Hz (manual switching) EFFECT Spring Reverb CHANNELS 2 Indipendent channels DIMENSIONS 300x340x245 mm WEIGHT 9 Kg