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Demeter Introduces VTBP-201-800D and HBP-1-800D Powered Preamplifiers

Demeter VTBP-201-800D Powered PreampDemeter Amplification has introduced VTBP-201-800D and HBP-1-800D, a pair of powered preamplifiers that take the company’s existing HBP-1 and VTBP-201 bass preamps and match them with 800 Watt Class D amplifiers. The units feature Jensen transformers to completely isolate the pre and power amp sections, which they say allow for noiseless operation. The preamp can also still be used on its own.

Demeter can retrofit existing preamps with the new power amp section. The VTBP-201-800D and HBP-1-800D are available now with MSRPs of $1,619 and $1,659, respectively. For more info, check out the Demeter Amplification website.

Demeter VTBP-201-800D Specs:

  • Input impedance: > 1megohm
  • Output impedance (line): > 2kohm, (unbalanced)
  • Output impedance (mic): > 50ohms (balanced) HBP1J : 150ohm, (balanced),
  • Minimum load impedance: 600ohms
  • Maximum output: + 24dBV @ 600ohms
  • 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 1-12AT7
  • Inputs: 1/4” (passive and active)
  • Outputs (preamp): 3-pin balanced mic/line, TT, XLR & ¼”
  • Chassis: Single space rack
  • Operating voltage: 115V/230V AC switchable
  • Power supply: 250V fully regulated
  • Filament: 12.6V fully regulated
  • Outputs (power amp): 1/4” Speaker & Speakon
  • Output impedance (power amp): 4 ohm, 8 ohm, 16 ohm
  • Output Power (power amp): 800 watt RMS @ 4 ohms, 400 watt RMS @ 8 ohms

Demeter HBP-1-800D Specs:

  • Input impedance: > 1megohm
  • Minimum load impedance: 600ohms
  • Ouput Impedence (studio output): 50ohms, balanced
  • HBP1J: 150ohms (balanced)
  • Maximum output: + 24dBV @ 600ohms
  • 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 (preamp): 3-pin balanced mic/line, TT, XLR & ¼”
  • HBP1J (preamp): 3-pin balanced mic, with switchable post/pre eq
  • Chassis: Single space rack
  • Operating voltage: 115V/230V AC switchable
  • Power supply: 250V fully regulated
  • Filament: 12.6V fully regulated
  • Outputs (power amp): 1/4” Speaker & Speakon
  • Output impedance (power amp): 4 ohm, 8 ohm, 16 ohm
  • Output Power (power amp): 800 watt RMS @ 4 ohms, 500 watt RMS @ 8 ohms