Demeter HBP-1 Bass Tube Preamp

The HBP-1 H Series Bass Preamplifier by James Demeter uses the same all tube front end found in his classic VTBP-201 Bass pre-amplifier and combines it with the revolutionary H Series circuitry found in his professional audio H Series line. This preamplifier provides the best of both the tube and solid state world. It features 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, a full balanced output with switchable mic or line level, both a balanced TRS line level output and an unbalanced line level output for amplifier connections and a mute switch. As with all Demeter equipment, it is meticulously hand-wired using the finest components and assembled in the U.S.A.

Specifications

Input impedance: > 1megohm

Minimum load impedance: 600ohms

Maximum output: + 24dBV @ 600ohms + 28dB

Gain: Adjustable to + 10dB Mid 440Hz to 4KHz

EQ gain : + or - 15dB

Signal to noise ratio: - 80dB

THD : .5%

Frequency response : 10Hz to 40kHz

Tube: 1-12AX7a selected

Parametric EQ: Q or width continuously variable Low 40Hz to 440Hz Mid 440Hz to 4.4KHz

Inputs: 1/4" (passive and active) Outputs: 3-pin balanced mic/line, TT, XLR & 1/4"

Chassis: Single space rack

Operating voltage: 115V/230V AC switchable

Power supply: 250V fully regulated

Filament: 12.6V fully regulated