Demeter HBP-1J-Jensen Bass Preamp

Demeter HBP-1J Bass Preamp

With Jensen Transformer Output
The HBP-1 H Series Tube 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.

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