Duo Boost

What's better than a boost? Why, two different boosts in one box of course.

Flavour one is a FET boost, much like the Keeley Katana.

Flavour two is an op-amp boost, much like the MXR Micro Amp.

Flip the toggle switch to choose between the two, with a single volume knob doing the honours for both.

Both are supplied by a charge pump, meaning you get around 18V of headroom from your 9V supply. Why is that a big deal? Cleanliness my dears. More V for your signal to bounce around in means less distortion. Your sine wave will be intact at the output with no clipping. All the better to push your amp with.

You have the option of through-hole or SMT FETs - the latter are tiny and fiddly to work with but you'll save a few £.

If you want the PCB without parts there's a link for that at the bottom of the page.

Partial kit: PCB, all board-mounted components), pots.

Full kit: As above, plus footswitch and appropriate daughterboard/components for your selected bypass type (see Downloads section for details of those), jack sockets, DC socket, battery snap, hook-up wire, LED.

Enclosure (pre-drilled) is available as an option with full kits, and can take a battery if desired with footswitch positioned 22mm higher, closer to the controls. Knobs are not included.

Builds are only available with full kits including enclosure. Please choose appropriate knobs.

Inspired by: JHS Solo Boost

Difficulty: Easy

PCB size: 50 x 50mm

Knobs required: 1

Enclosure: 1590B

Direct-Connect compatible (4-way)

Download the INSTRUCTION PDF