LD400 Pro offers venue-filling volume and famous LowDown® tone in a powerful and punchy 2x10 combo package.

Boasting a relentless, fully adjustable Rock tone, and four additional required tones ranging from Clean to R&B to Grind, LD400 Pro offers uncompromising power, extraordinary versatility and commanding tonal definition for the pro player.

A crucial set of five essential effects, led by a dedicated studio-quality compressor based on* the immortal LA-2A®, includes must-have Smart Control FX Envelope Filter, Octaver and Chorus, and a full-featured bass Synth with fully adjustable parameters.

Designed for the gigging bassist, LD400 Pro features an array of necessary ins, outs and hardware including an NL4M-series Speakon® speaker output for an external cabinet, a balanced XLR direct output with exclusive A.I.R.™ processing, a 1/4" preamp output and a pair of brawny 10" speakers ready to rattle some ribs and project your sound.

  • 5 Incredible Bass Amp Models: Clean, R&B, Rock, Brit, and Grind
  • 5 Essential Bass Effects: dedicated studio-grade Compressor plus 3 Smart Control FX including Envelope Filter, Octaver and Chorus, and a fully adjustable bass Synth
  • Deep switch for supreme fatness
  • 4 Programmable channel memories, 36 with FBV Shortboard™
  • Front-panel tuner
  • 400 watts
  • 2x10" speakers and high-frequency compression driver
  • NL4M-series Speakon® four-pole mono speaker output for external cabinet
  • Balanced XLR direct output with exclusive A.I.R.™ processing (plug straight into the snake at the gig or into the board at the studio)
  • 1/4" preamp output
  • Headphone out
  • 1/8" CD/MP3 input
  • Jack for FBV Express™ or FBV Shortboard

Inspired by* the Eden Traveler, this model is all about clean, funk and fusion bass tone. It’ll give you all the warm lows and punchy highs you need

Inspired by* a '68 B-15 Flip Top, this model is a tribute to those late 60’s and early 70’s clean fat bass tones. It is the kind of tone you hear on most Motown recordings, as played by a pioneering young bassist, James Jamerson.

This model is inspired by* the ’74 Ampeg® SVT® which has appeared on innumerable recordings and arena stages worldwide. Now, all the tone of the head and 300-pound behemoth 8x10 cab is available without having to lookup a chiropractor.

Based on a ’68 Marshall® Super Bass, this model delivers the kind of overdriven bass sounds brought to us by late ‘60s British rock pioneers like Cream and The Who.

As the name would suggest, this is for modern rock lovers—Alice in Chains to Mudvayne and Rage Against The Machine. Based on* a distorted SansAmp PSA-1 into an SVT® with a direct clean bass signal mixed in, this model gives you that angry, clear and punchy aggression that cuts through the mix and takes your sound to DEFCON 1.


This pro LA-2A®-style compressor is ideal for every bass player and particularly useful for the ones who play with their fingers—achieve a smooth and consistent signal at any volume.

Envelope filter
Based on* a Q-Tron, this is the baddest envelope filter on the planet. This effect can be heard on tons of major funk and rock tunes.

Based on* the EBS® OctaBass®, this effect produces a single note one octave below the note you’re playing to add a powerful new vibe to your sound.

Based on* the much loved T.C. Electronic® Chorus. This is the most transparent, smooth and expressive chorus ever built for bass—and using it won’t reduce your low end. It’s especially beautiful with fretless basses.

Sitting at the back of the model knob is this secret weapon that turns LowDown into a ’70s classic bass synth. From funk to modern rock, this fully adjustable synth delivers incredible tones while tracking every dynamic move you make!


FBV Express™
  • Switches for channels A, B, C, & D
  • Volume/Wah Pedal
  • Chromatic Tuner Interface
  • Self-powered through the included locking RJ-45 cable

FBV Shortboard™

  • 9 banks, 36 channel memories
  • Dedicated channel switches
  • Dedicated effects switches
  • Large LCD display
  • Volume/Wah pedal
  • Expression pedal input for dedicated volume control
  • Chromatic tuner
  • Self-powered through the included locking RJ-45 cable

* All product names used in this webpage are trademarks of their respective owners, which are in no way associated or affiliated with Line 6. These trademarks of other manufacturers are used solely to identify the products of those manufacturers whose tones and sounds were studied during Line 6’s sound model development.