The legendary tone and portability of the all-tube Ampeg Portaflex amplifiers is faithfully reproduced in the PF-20T. This all-tube Portaflex head provides a harmonically rich and studio-worthy 20 watts of pure Ampeg tone to satisfy the most discerning bass player. Featuring simple user-adjustable bias adjustment for easy tube replacement and pre-amp and transformer balanced direct outs for maximum versatility.
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Plus, no speaker load is required for silent recording or even use as a dedicated tube DI. Pair it with the PF-112HLF for the ultimate compact all-tube bass rig.
RMS power output: 20W @ 4 or 8 ohms
Preamp: All-tube  x 12AX7
Power amp: All-tube  x 6V6
Tone controls: Bass, Mid, Treble
Input gain control
Preamp balanced line out
Transformer balanced line out
User adjustable bias control
Dimensions (H x W x D inches):7.3 x 13.0 x 10.4 in /185 x 330 x 264 mm