Contact us on 07970061897 or
Sold out
  • Vintage 1970s Fender 400PS KT88 Valve Bass Guitar Amplifier
  • IMG_2693
  • IMG_2694
  • IMG_2696
  • IMG_2697
  • IMG_2698
  • IMG_2699
  • IMG_2700
  • IMG_2701
  • IMG_2702
  • IMG_2703
  • IMG_2704
  • IMG_2705
  • IMG_2706
  • IMG_2707
  • IMG_2709
  • IMG_2710
  • IMG_2711
  • IMG_2712
  • IMG_2713
  • IMG_2714
  • IMG_2715
  • IMG_2716
  • IMG_2717
  • IMG_2718

Vintage 1970s Fender 400PS KT88 Valve Bass Guitar Amplifier


Out of stock


We buy your vintage instruments for cash. Get in touch to find out more.

Vintage 1970s Fender 400PS KT88 Valve Bass Guitar Amplifier

Vintage 1970s Fender 400PS KT88 Valve Bass Guitar Amplifier

Oh wow! What a beast of an amplifier! We’d never seen such a large and heavy amplifier with such an awesome output! A set of 6x JJ KT88 valves power this beast, alongside a 6L6 and several RCA pre amp valves. The transformers are beefy, and all date to 1970, and the original power cable is included in the sale. There are three speaker outputs, each at 145 watts – totalling over 400 watts of raw power!

There is a brilliant write up of this amplifier here, well worth a read –

It is relatively untouched underneath on the circuit board, and the condition is extremely good! The tolex has very few scuffs to it, and it is slightly rusting in places, but nothing out the ordinary. Wonderful condition for it’s age.

Serial Number: 225A

This amplifier has been serviced to a playable & safe standard, by one of our leading amp techs. To find out more about what our service includes, please check out our terms and conditions before purchasing.

Please have a close look at the high resolution photographs below, as these form part of our description.

Inland delivery will be via a personal courier service, so please bear in mind there may be a few days wait for the courier to pick up from us. International shipping includes full tracking and insurance for the price of sale via UPS.

At The Music Locker we will do all we can for you to get the instrument you want. You’re more than welcome to come and have a play on this, coupled with one of our vintage guitars!

Additional Information

Country of Manufacture







For more information on shipping prices, please visit our shipping page.

The Music Locker prides itself on offering vintage and collectable pre-owned instruments and equipment (the Products).

We take all reasonable steps to ensure the equipment has been inspected by a competent person in the UK to ensure it complies with UK safety standards. This may mean it does not comply with the current standards in the country in which it will be subsequently used. It is the purchasers’ responsibility to ensure it is inspected by a competent person knowledgeable with the relevant electrical safety standards within that country, prior to connecting to any live electrical circuit.

It is the philosophy of The Music Locker to keep all items as original as possible, only changing original components when absolutely necessary. This includes valves, capacitors, transformers, potentiometers, frets, etc. This gives the buyer the option of tailoring to their exact needs, and may mean that the item is not operating at optimum performance levels. Therefore, your personal preference may differ, depending on your circumstances (i.e. collector or musician), and you may decide to service the item in more depth upon receiving.

The Music Locker cannot accept responsibility for any costs of refurbishment to a standard different to the one advertised.