The HBP1-800D 800W Tube Bass Pre/Power Amp from Demeter is a tube bass pre and power amp that delivers 800W of power into a 4 ohm load. It integrates an 800 Watt Class D amplifier into a HBP-1 Preamplifier circuit. This unit uses the same all tube front end found in the VTBP-201 Bass pre-amplifier and combines it with the H Series circuitry found in the professional audio H Series line.
Utilizing the best of both the tube and solid-state world, the HBP-1-800D features a high-voltage (250V) tube front end (providing all of the preamplifier gain and passive tone controls), a two-band solid state fully parametric equalizer that is tuned for bass, a fully adjustable active effects loop with controls up front, a tuner output and a balanced output with switchable mic or line level. It also features both a balanced TRS line level output and an unbalanced line level output for amplifier connections, and a mute switch.