Ashdown - Valve BTA 400 400-watt Valve Bass Amp Head

Item # AMPBTA400
| Mfg # BTA400
| UPC # 094922759412
Our Price: $3,999.99
Retail: $5,599.99 | You Save: 28%
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Combining straightforward rotary tone controls with two pairs of additional EQ sliders for the more sonically sophisticated, Ashdown's ABM preamp became an instant classic when it hit the bass world over a decade ago.

The BTA 400 (Big Tube Head) partners a third-generation ABM preamp with a 400-Watt, 6 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. The BTA 400 partners perfectly with a range of Ashdown US Series cabinets.


  • Power Output (RMS) 400 Watt
  • Power Handling 350 Watt Continuous
  • Power Requirement 115-230 Volts
  • Speaker Outputs 2 Ohm/ 4 Ohm/ 8 Ohm
  • Frequency Response -3dB @ 17Hz und 30kHz
  • High Instrument Input Impedance 3.9m Ohm, input range 150mV -
  • Low Instrument Input Impedance 10k Ohm, input range 300mV -
  • Line Input Impedance 22k Ohm, input level 0dBu nominal
  • Sub Output Impedance 1k Ohm, level 0dBu Nominal
  • DI Output 600 Ohm balanced, level 0dBu nominal
  • Tuner Output Impedanz 22k Ohm, level 0dBu nominal
  • Impedance Minimum impedance 2 Ohms
  • EQ Bass +/-15dB @ 45Hz Middle +/-15dB @ 660Hz Treble +/-15dB @ 7kHz shelving Slider 1 +/-15dB @ 180Hz Slider 2 +/-15dB @ 340Hz Slid
  • Effects Send Impedance 22k Ohm, level 0dBu nominal
  • Effects Return Impedanz 22k Ohm, input level 0dBu Nominal
  • Pre-Amp Tubes 1 X ECC 83 2 X ECC82 1 X ECC 99
  • Output Tubes 6 X KT88 ( JJ REC.D)
  • H x W x D (mm) 362 x 610 x 300
  • Weight (kg) 35

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Product Warranty Information

  Product warrenty information

All instruments in our catalogs and on our shopping site carry the manufacturers' warranties against defects in parts and workmanship. Should a defect occur within the manufacturer's warranty period, contact us immediately.

We will be glad to help facilitate the repair or replacement as specified by the manufacturer. The manufacturer will determine whether the defect is covered under their warranty; we do not make that determination.

Please note: U.S.-based manufacturers WILL NOT honor warranties for items sold and shipped outside the U.S. Also, if a school, school district, or board of education purchases an instrument and resells it to an individual, the manufacturer considers the warranty to be void. Warranties are extended only to the original purchaser!

All warranties, stated or implied are held with the product manufacturer and they vary from item to item. Consult the documentation that came with your product for details in addition to the information below.
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Founded in 1997 by Mark Gooday of Trace Elliot, Ashdown bass amps are now used by bands and artists like Foo Fighters, U2, Pino Palladino, Radiohead and more. They also offer amps from 10 watt practice amps to UK hand-crafted 400 watt all-valve monsters.
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