Description

Demeter Amplification HBP-1 Tube Bass Preamp, $799!

A professional-grade hybrid tube bass preamp combining a warm 12AX7 tube stage with active EQ and a studio-quality parametric midrange section, designed for both live and recording applications.

Type: Bass Preamp (Rackmount)
Model: HBP-1
Manufacturer: Demeter Amplification
Country of Manufacture: United States
Year of Introduction: 1990s

Tubes:

  • 1 x 12AX7 (preamp stage)

EQ Section:

  • Treble (±12 dB @ 6 kHz shelving)

  • Bass (±12 dB @ 80 Hz shelving)

  • Parametric Midrange: sweepable center frequency (250 Hz to 3 kHz) with ±12 dB cut/boost and variable bandwidth (Q)

Controls:

  • Gain

  • Master Volume

  • Treble

  • Bass

  • Mid Frequency

  • Mid Level

  • Bandwidth

  • Bright Switch

  • Mute Switch

Inputs:

  • ¼” front-panel instrument input

  • ¼” rear-panel passive/active instrument input

Outputs:

  • ¼” unbalanced line out

  • XLR balanced DI out with ground lift

  • ¼” tuner out

  • Effects loop (Send/Return)

Power Supply: Internal AC

Notable Features:

  • Hybrid design offers tube warmth with precision EQ control

  • Studio-grade DI output ideal for recording and FOH applications

  • Highly responsive and musical midrange control via parametric EQ

  • Transparent, detailed signal path with extremely low noise

  • Widely used by professional bassists for tone shaping in both studio and stage environments