JP's fabled Hey What!? amp!

Power Output: 100 Watts

Footswitchable "Balance" control. When off, the amp is boosted. When On, "Balance" can set the gain, allowing you to preset a cleanish tone.

Volume Control
Treble, Middle, Bass equalization
Master Volume and Presence control
External bias probe jacks and bias adjustment
Footswitch Included
Current lead times are listed on the main page at

Power: 4 x EL34
Preamp: 3 x 12AX7/ECC83, 1 x 12AT7 / ECC81
Rectifier: Solid State

The incredible British amplifiers expertly built in the late ‘60s and ‘70s inspired us to create the Ceriatone Hey What series.

Hey What?! JP 100 Configuration Options:

  • Chassis I - $1,226
    (Fully working chassis. Tubes not included. No cabinet.)
  • Chassis II - $1,406
    (Fully working chassis. Tubes included. No cabinet.)
  • Amp Head I - $1,514
    (Fully working chassis installed in a head cabinet. Tubes not included.)
  • Amp Head II - $1,694
    (Fully working chassis installed in a head cabinet. Tubes included.)

    Main photo is for illustrative purposes only and advertised base pricing is for Chassis I without tubes. Photos may include options that are not included if you order the standard version of the amp or don't order all options available. We also may not offer all options available and/or shown in main illustrative photos. Photos are of products assembled by Ceriatone. We no longer sell kits. Black Tolex is standard on all amps unless otherwise stated in product description.

    Ceriatone amps are custom made, 100% hand-built, point-to-point hand-wired amplifiers using the highest quality components and custom wound transformers. Each amp is thoroughly tested and burned in before it is shipped to you. Even with long lead times Ceriatone takes no shortcuts or makes any changes to their build standards in the production of their hand-built amps. This is Ceriatone quality.

    Pricing shown on includes the shipping cost to the USA only. We only ship to the USA, Canada and Mexico. Shipping to Canada, Mexico, Puerto Rico and the US Virgin Islands will have additional shipping. We'll invoice the difference in shipping and it is due at the time the order is placed.

    Paypal is our payment processor and you do not need a Paypal account to check out. They do offer 4 types of payments. Any Debit/Credit card with one click pay, PayPal 4-Pay, use your Paypal account, or use PayPal Financing (6/12/24 months) at checkout.

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    HeyWhat?! JP 100

    • $1,226.00

    Available Options