LoPHAT 800D Amplifier


Preamp Specifications
Inputs: one instrument level 1/4” jack.
Output impedence (line): > 1k ohm, unbalanced
Minimum load impedence: 10k
Imput impedence: > 1megohm
Maximum output: +24dBV
EQ gain : + or – 12dB
Signal to noise ratio : 80dB
THD : .5%
Outputs (preamp): 1/4″ unbalanced, Optional 3 pin XLR Direct out
Frequency response: 10Hz to 40kHz
Tube: 1- 12AX7a
Operating voltage: 115V or 230V AC
Power supply: 280V DC
Filament: 6.3 V DC

Power Amp Specifications
Output (power amp): 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



  • Treble Control: The treble control gives 6 dB of boost or cut at 4 kHz (6dB per octave, shelving type).
  • Middle Control: The middle give 6dB of boost or cut at 500Hz (wide Q, peaking type).Bass Control: The bass control gives 9dB of boost or cut at a selectable frequency of 60Hz or 120Hz (6dB per octave, shelving type).
  • Presence Control: The presence control gives up to 12dB of deep boost at a selectable on/off switch (active type, 6dB per octave).
  • Mode switch: Dark, is a high frequency cut fatting up your fundamental. Normal, flat operation showing off more overtones. Bright, brings out the overtones on the dullest basses or speakers.
  • Internal Volume Trimmer: This control is designed to match the output volume of the LoPHAT-800D with the sensitivity of any Bass.
  • Optional, Studio Output: The LoPHAT-800Dm- features a mic level Jensen DB-E output transformer for a balanced studio output.
  • Effects Loop: in/out line level
  • Power Amp Outputs: Operating at 4 ohm (800w) 8 (500w) or 16 ohm (250w) 1/4” & Speakon


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