Demeter HBP-1J-800D Tube Bass Preamplifier with Jensen Transformer

BH #DEHBP1J800D • MFR #HBP-1J-800D
Demeter HBP-1J-800D Tube Bass Preamplifier with Jensen Transformer
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Expected availability: 7-14 business days

Important Notice

  • This item is noncancelable and nonreturnable.
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Demeter HBP-1J-800D Overview

The HBP-1J-800D Tube Bass Preamplifier with Jensen Transformer 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.

Jensen transformers allow for noiseless operation, whether you use the preamp on its own, or in tandem with the power amp output. The transformer-based design also has the unique advantage of 'warming' up the power amp output. The power amp section features a Speakon and 1/4" speaker output. As with all Demeter equipment, it is meticulously hand-wired using the finest components and assembled in the U.S.A.

Demeter HBP-1J-800D Specs

Input Impedance> 1 MOhm
Minimum Load Impedance600 ohms
Ouput Impedance50 ohms, balanced (studio output)
4 ohms, 8 ohms, 16 ohms (power amp)
Maximum Output+24 dBV @ 600 ohms
Output Power800 watt RMS @ 4 ohms, 500 watt RMS @ 8 ohms (power amp)
GainAdjustable to +10 dB mid 440 Hz to 4 kHz
EQ gain: + or - 15 dB
Signal to Noise Ratio-80 dB
Frequency Response10 Hz to 40 kHz
Tube1-12AX7a selected
Parametric EqualizerQ or width continuously variable Low 40 Hz to 440 Hz Mid 440 Hz to 4.4 kHz
Inputs1/4" (passive and active)
OutputsPreamp: 3-pin balanced mic/line, TT, XLR & 1/4"
Power Amp: 1/4" Speaker & Speakon
ChassisSingle space rack
Operating Voltage115-230 VAC switchable
Power Supply250 V fully regulated
Filament12.6 V fully regulated
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