Ashdown BTA 400 Bass Amplifier Head

Ashdown BTA 400 Big Tube Head bass amplifiers feature a hybrid design that combines a solid state preamp with a valve power amp stage, loaded with KT88 tubes. Ashdown BTA 400 bass amps offer straight forward rotary tone controls, with two pairs of additional EQ sliders for the more sonically sophisticated. BTA400 also features Ashdown's ABM preamp, which became an instant classic when it hit the bass world over a decade ago.

BTA400 (Big Tube Head) partners a third-generation ABM preamp with a 400-Watt, 8 x KT88 valve output stage for ABM sophistication with bone-crushing tube power. All the ABM features are there - EQ In/Out footswitching, variable Tube/Solid-State input stages, on-board compressor and Sub Harmonic Generator, balanced DI Output with Pre/Post EQ switching, FX loop, Tuner output and more.

Ashdown BTA 400 makes the ideal partner for Ashdown range of ABM and Classic Series speaker cabinets.

• Power Output (RMS): 400W
• Power Requirement: 230 / 115V
• Frequency Response:  -3dB at 17Hz and 30kHz
• High Instrument Input:  Impedance 3.9m Ohms, input range 150mV - 20mV p-p
• Low Instrument Input:  Impedance 10k Ohms, input range 300mV - 40V p-p
• Line Input:  Impedance 22k Ohms, input level 0dBu nominal
• Sub Output:  Impedance 1k Ohms, level 0dBu Nominal
• DI Output:  600 Ohms balanced, level 0dBu nominal
• Tuner Output:  Impedance 22k Ohms, level 0dBu nominal
  EQ Bass +/-15dB @ 45Hz
  Middle +/-15dB @ 660Hz
  Treble +/-15dB @ 7kHz shelving
  Slider 1 +/-15dB @ 180Hz
  Slider 2 +/-15dB @ 340Hz
  Slider 3 +/-15dB @ 1.3kHz
  Slider 4 +/-15dB @ 2.6kHz
  Shape (Push Flat) +8dB @ 50Hz & 4kHz, -8dB
  @ 400Hz, filter slope - 6dB/octave
• Effects Send:  Impedance 22k Ohms, level 0dBu nominal
• Effects Return:  Impedance 22k Ohms, input level 0dBu Nominal
• Dimensions: H x W x D (mm) 266 x 610 x 335