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WJBPII Twin Channel Bass Pre-Amp

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Wayne Jones AUDIO WJBPII Twin Channel Bass Guitar Pre-Amp. 2 Independent channels that also can be used together. Stero/Mono Inputs. Phantom power option. 6 band EQ plus 30hZ boost

WJBPII TWIN CHANNEL BASS PRE-AMP, featuring the option of phantom power on the second channel.

Wayne Jones AUDIO, bass guitar powered bass cabinets, direct from manufacturer, 100% satisfaction guaranteed. Speakers for bass guitars.WJBPII TWIN CHANNEL BASS PRE-AMP featuring phantom power option on the second channel.

** Product Currently Out Of Stock **

Listening to endorsees Scott Colley & André Berry I designed this new edition for the endorsee family. Scott needed one channel for his double bass pick up and a second channel for the phantom powered mic he uses on the bass. Andre needed extended treble frequencies. I also made a few of my own changes to the WJBPII.

The WJBPII is designed with a no compromise attitude in Cost, Quality, Components & Features just as are WJ High End High Powered Bass Cabinets.

Wayne Jones


DERRICK RAY (Rhianna, Alicia Keys, Mary J. Blige)
Wayne Jones!!!!!!!!! This is the best bass amp that I’ve ever played thru! OMG this new head is absolutely insane, I’m blown away. This technology is light years ahead of everyone. Thank you thank you thank you.

I’ve never played thru an amp system where my Bass tone was so pure and solid. It’s the type of tone you search for your whole career. Glad to represent Wayne Jones!

KEVIN WALKER (Prince, Justin Timberlake, Patti Labelle, Wilson Pickett, Kanye West, T.I, WILL.I.AM, Chaka Kahn, Brian Culbertson)
I've done many tours in my 40 Years of playing bass guitar. I've never Experienced a pre-amp like the Wayne Jones, that gives me studio dynamics live on Stage.. Simply Incredible.

Wayne Jones has a great unit in the WJBPII. Clean, clear and detailed and all the tube warmth you could ever need. Way to go Wayne!

Read more User Endorsements

ANDRÉ BERRY (David Sanborn)
The Wayne Jones WJBPII Bass Preamp is the best studio preamp/front end on the market. I use it into my audio interface and into my powered Wayne Jones Cabs. In the past when I’ve done sessions for various people in Los Angeles they would run the bass into their favourite mic pre and compressor combo, but now they ask “Did you bring the Wayne Jones?!” Check this unit out and bump your sound up to the level of the pros!

SCOTT COLLEY (John Scofield, Jim Hall, Pat Metheny, Michael Brecker, Herbie Hancock)
Wayne Jones has created a beautiful 2 channel tube preamp of the highest quality. It is exceptional for optimizing any high-end microphone and works seamlessly with the internal 48-volt phantom power from the preamp. This gives total control of the microphone sound with the 6 band built in EQ. The other channel can be used to combine the microphone with any pickup. The best of both worlds for acoustic bass! Thank you Wayne!

DAVID DYSON (Pieces Of A Dream, Unit 3 Deep, Walter Beasley)
This new pre is killer and even more versatile now! Plenty of options in shaping your sound. Clean, crisp, fat, and defined!! Don’t sleep! Check it out for yourself!

NATE PHILLIPS (Pleasure, George Clinton, Richard Elliot, Rick Braun)
Wayne Jones adds a truly outstanding two channel bass preamp to his already fantastic line of bass gear. I can find that sweet spot setting that I’ve never been able to get with any other amp. Wayne does it again!




  • 2 Independent channels that also can be used together
    Channel 1 – 1/4” stereo/mono input
    Channel 2 – Has the option of phantom power or just use it as a second channel
    2 XLR balanced inputs
  • 2 Input gain level controls with -10dB pad & Input clip Indicators for both channels
  • Optical compressor with level
  • 6 band EQ plus 30hZ boost
  • EQ Band frequencies:
    Band 1 20-300Hz, Centre set at 80Hz
    Band 2 60-1KHz, Centre set at 160 Hz
    Band 3 150-2.5KHz, Centre set at 500Hz
    Band 4 450-8KHz, Centre set at 1.6KHz
    Band 5 1KHz-20KHz Centre set at 5KHz
    Band 6 Centre set at 10KHz
  • Stereo pan control (for use when using 1 or 2 outputs to 1 or 2 WJ 1000 Watt Powered 2×10 cabs)
  • Channel selector Independent volume control of both channels
  • Master Stage volume Pre amp Output Indicator


  • Outside power supply to ensure studio quality noiseless operation, switchable 115/230V
  • Output – Stereo XLR balanced outputs out with Level Control, pre or post EQ button & 1/4” unbalanced. Works in conjunction with the pan control
  • Stereo/Mono FX loop
  • Foot switch mutes all output for silent tuning
  • DI pre or post with level control
  • Ground Lift for DI
  • Aux in – 1/4” or mini jack
  • Headphone out with level control


Master Outs 2 balanced XLR (recommended) outs for connection to WJ powered cabinets or to separate power amps. Balance control on from panel will affect these outputs.

Also a choice of 2 Unbalanced 1/4" outputs for same function. (not recommended as output is lower).

All master outs can be used together as a pair or individually with balance control set to the respective output.

FX Send & Return - Stereo or mono.

Foot switch - Mutes all output

DI Output - Balanced XLR out with Level control & pre or post EQ button

Aux Input - Stereo input, mini jack & 1/4” Phono. You can use this to plug items such as iPad, iPhone backing tracks etc. to play along with.

Headphone With Volume Control - Plug in your headphones to practise with. You can use the WJBPII by itself without plugging into a power amp.

Dimensions - 10 x 30 x 25 cm / 3.9 x 11.8 x 9.8 in

Weight - 3.2 kg / 7 lb

Rack Mount Ears - Included

Product Videos
Introducing the WJBPII Bass Guitar Twin Channel Pre-Amp André Berry presents the WJBPII Twin Channel Bass Pre-Amp Wayne Jones describes features of the WJBP Valve Stereo Bass Pre-Amp How a Front of House engineer thinks about your sound
WJBPII Twin Channel Bass Pre-Amp 
Wayne Jones AUDIO WJBPII Twin Channel Bass Guitar Pre-Amp. 2 Independent channels that also can be used together. Stero/Mono Inputs. Phantom power option. 6 band EQ plus 30hZ boost