Fender Champ

The 5C1[3] circuit was extraordinarily simple, using one 6SJ7 pentode in the preamplifier section to provide a single stage of voltage amplification, one 6V6 beam power tetrode in the power amplifier section, a 5Y3 rectifier tube and a single volume knob with no tone controls.

The 5E1[5] and 5F1[6] circuits used a 12AX7 dual triode in the preamplifier to provide two stages of voltage amplification, and a single 6V6GT power tube to produce about 5 watts.

Fender brought back the blackface cosmetics for a short time in 1981 before discontinuing the Champ the following year.

Cosmetically similar to the original Champion 600,[11] internally it features a modified blackface Champ circuit (with the settings of the tone stack being hard-wired rather than adjustable via Treble and Bass controls, and a couple of additional resistors reducing input-stage gain) and a switch to solid-state rectification from the original 5Y3 tube.

The effect of the volume, gain and tone control knobs varies according to the selected amp model.

In January 2021 Fender introduced the '68 Custom Vibro Champ Reverb as a part of their Vintage Modified series.

This 5-watt silverface combo amplifier is identical to the original late-1960s Vibro Champ except for the inclusion of hall reverb, modified circuitry and a larger 10" Celestion® Ten 30 speaker.

Even though he did not personally create the new designs, his direction of the engineering team, headed by Ed Jahns and Bill Hughes, resulted in some legendary amps, including the Super Champ.

Featuring a push-pull output, 10" speaker, and spring reverb, as well as some new circuitry; master volume, a switchable extra gain stage for a 'lead' effect, and a mid-boost switch.

[14] The Super Champ utilized 1× 12AX7 for the first and second stage preamp, a 1× 12AT7 for spring reverb driver tube, whilst the three sections of the triple-triode 6C10 compactron serve as a recovery for the spring reverb, as a driver for the phase inverter, and as a split-load phase inverter.

[14] It was discontinued in 1983, along with the Bassman 20 (with which it shared the same metal chassis design), three years before the rest of the range, perhaps because its dearth of features was unfashionable at the time.

It had the same colour scheme, power supply, output stage and stock speaker as the Super Champ but the preamp and phase inverter consisted of two 12AX7 tubes.

Aside from one dual-triode 12AX7 and two 6V6 output tubes, it also has a digital signal processor (DSP) which models 16 different amplifiers and programs the volume, gain, and tone controls accordingly.

The X2 is designed to interface with the FUSE software used by the Fender Mustang series of modeling solid-state amplifiers, and is also available in both combo and discrete head/speaker cabinet units.