Amps for sale

THD Flexi 50 amp head (pre-owned) – $2,000

THD Flexi 50. Purchased directly from Andy Marshall in September 2019. As new condition.

The Flexi-50 is a precision hand-built 50-watt Class-AB amplifier with overdrive/boost, master volume control and the ability to use almost any preamp and power tubes in any combination, including 6L6, EL34, 6V6, 6CA7, 8417, 6550, KT66, KT77, KT88, KT90, KT100, EL84 (with Yellow Jacket adaptor), 6K6, 6F6, 12AX7, 12AY7, 12AU7, 12AT7, 12AZ7, 12DW7, 12BH7, ECC83, ECC82, ECC81 and many more, giving the user a huge pallet of available sounds simply by changing tubes.

The amplifier has a fat, clear, full clean sound reminiscent of late 1950s to early 1960s American combos, and overdrive to rival the best British heads. Even at the highest overdrive settings, the amp still demonstrates dramatic touch sensitivity, cleaning up very well when the volume on the guitar is reduced. Additional features include external bias test points and individual bias controls, permitting the user to quickly and accurately set the output tube bias with any digital voltmeter. The dual bias controls permit the user to correctly bias even mismatched tubes, eliminating the need for matched power tubes.

Currently running 6L6 power tubes giving it a big Fender Twin sound. With EL34s it sounds like a Marshall. I will supply a free pair of EL34 tubes with the amp.

Power cable and footswitch included