The DA20 is often known as a "busker" amp, a battery powered amp used by street musicians. The DA20 amp can operate either on six "C" cells or may be plugged into a wall outlet.

The DA20 includes many of the features found in Vox Valvetronix amps. Eleven amp models and eleven guitar effects are included on the DA20.

A built in rotary power output selector switch helps to extend battery life. By selecting the 0.5 watt power level, battery life up to 25 hours can be expected. At the 1.5 watt setting, battery life of up to 18 hours is expected. At the "Max" power level, the expected battery life is 8 hours. Connecting the DA20 to wall current allows the DA20 to operate at the full 20 watt output level.

The DA20 has two 8" Vox special design speakers.

The DA20 has a unique "dark chrome" plated steel grill. North Coast Music offered the DA20 with an aftermarket conversion to brown or black Vox diamond grill cloth.

The DA20 was introduced in 2007 and discontinued in 2009.