Prototype & B Stock Amplifiers

         USA Tariff Exempt

This listing is for Fully Functional Built Prototypes of our production amplifiers, “B” stock of our production amplifiers that have minor cosmetic defects, and for Unique amplifiers that were used to develop and explore circuit ideas.

In all cases, these units are Used, in most cases the wear is minor and barely noticeable. Otherwise the individual listings will detail it.

These amplifiers do not come with supplied tubes, power cords, switchmode power supplies or manuals. If the specifications of the amplifier are equivalent to a current production Kit Amp, then we will state so and link to the information for that amplifier.

NOTE: Unless otherwise stated, all amplifiers operate at 110-120vac. If you live in a country that operates at 220-240vac and are interested in one of those amplifiers. Please contact us ahead of ordering, we mostly build with universal power supplies and may be able to modify it to suit your needs.

Warranty: 90 days against defects.