Much like the JTM50 “black flag”, the 20W “Lead and Bass” is an amplifier that many guitarists aren’t terribly familiar with. Both tonally and in design, the 20W shares similarities to the 18W standard.  However, there is no tremolo circuit. Instead, each channel is voiced slightly differently (hence “Lead” and “Bass”).  Moreover, the power section uses solid-state rectification, which increases the power output, adds headroom, and imparts a faster and more solid feel compared to the EZ81-equipped counterparts.

If you’re a fan of the 18W Normal channel but would like more tonal variation and/or a firmer, more percussive attack…the 20W Lead and Bass is right up your alley. As with our other modified 18Ws and 36Ws, this chassis is suitable for both head and combo formats. Like other Ceriatone amps, we have labored carefully to select the finest components to suit the design, and the 36W uses our specially designed, custom transformers for superior reliability, frequency response, and feel.

Current lead times are listed on the main page at


Power: 20 watts
Tubes: EL84 x 2   /   12AX7 x 2
Channels: 2 (Lead, Bass)
Inputs: Dual for each Channel (High. Low Gain)
Impedance: 4/8/16 Ohm Selectable
External Bias Adjust: Included
Passive Effects Loop: Included

20 Watt Lead & Bass Lunchbox Amp Configurations:

  • Chassis I - $635
    (Fully working chassis. Tubes not included.)
  • Chassis II - $743
    (Fully working chassis w/ tubes)
  • Amp Head I - $804
    (Fully working chassis installed in a head cabinet. Tubes not included.)
  • Amp Head II - $912
    (Fully working chassis installed in a head cabinet w/tubes)
  • 112 Combo Amp - $1,116
    (Fully working chassis installed in a 112 Combo cabinet w/tubes. Speaker not 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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20 Watt Lead and Bass

  • $635.00

Available Options

Tags: ceriatone, marshall, 20w, 20 watt, lead and bass