State-of-the-art resonance circuitry is accessible via the Deep Switch. Front panel Level and Presence controls for easy set-up. For the player who wants portability coupled with great Marshall valve tone, we offer the EL84 20/20. This compact, single space, rack-mountable amp packs 20 Watts + 20 Watts (W) of Marshall valve power. Its quartet of EL84 power valves offers impressive clean headroom, in addition to the magnificent overdriven tones it exudes. A unique Deep switch brings in state-of-the-art, resonance circuitry which works with the speaker cabinet(s) being driven and results in a tight, low end boost which can't be mimicked via preamp EQ. The unit's Presence control and Line Level outputs add further to the flexibility of the EL84 20/20's superb natural tone. Surprisingly loud, the fan cooled EL84 20/20 is ideal for both studio and live work where harmonic tone is a must.