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Controls
- Frequency – Adjusts the center frequency (70Hz – 1.4kHz)
- Boost/Cut – Controls the amount of boost/cut of the selected frequencies
- Gain – Controls the overall output signal level
Specifications
- Designed for a 125B enclosure with top-mounted jacks
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| Weight | 0.275 oz |
|---|---|
| Dimensions | 1.525 × 1.95 × 0.5 in |
8 reviews for Mercurial Boost
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Clayton Higgins (verified owner) –
Sounds great and it’s going to be a lot more useful than I first thought it would be.
Dial it in so the guitar cuts through, or scoop the mids for a fat jazz tone.
It does “thump” when it’s turned on, so I added a 1.2M resistor from BO to GND. Easy fix.
bniderlaw (verified owner) –
Nice, clean build, as expected, and it does what it says on the tin, all the way up to treble boost. Adds negligible noise if any. Just finished it, so I haven’t yet figured out how I am going to use it, but I’m pretty sure that I will–sounds great. BTW, although it is supposedly designed for a 125B size enclosure, I built it in a 1590B with no problem, just no battery and side mounted jacks.
bniderlaw (verified owner) –
Had to drop it down a star because of the popping. I added a resistor to ground at the input, and cobbled in the AMZ 2-resistors-and-a-cap LDR substitution, and still, it pops. Not sure what else to do. But it still sounds great, and has a million uses–if only it didn’t pop!
joedaddio (verified owner) –
I love this pedal. It really gives you a lot of power in shaping your tone. This may be my only “always on” pedal. I don’t get any popping when turning the pedal on/off.
kroars (verified owner) –
Wow, just wow! I see now why they call this circuit the tone scalpel. Just knocked my old favorite boost off the board.
a wolf (verified owner) –
So simple. Once you get a feel for how the knobs work, you can be very subtle with this. It’s often said that midrange is the most important part of your tone to get right, and this pedal shines at that, plus, you get a fairly clean boost thrown in. This pedal, into the Chop Shop, encapsulates the sound I have been focused on for the past few years. It just makes it easier to get, especially if you want to finesse a slight boost or cut to your midrange without altering your highs and lows.
skillzmcgavern (verified owner) –
Holy f’n boost. Seriously. Volume to spare. Frequency is wired in reverse – high end CCW, bass CW – wish that the volume went below unity without cut, and for a higher treble frequency. Still 5 stars.
jcpst (verified owner) –
I’ve had this for a while. I thought of it as a nice semi-parametric EQ. But when I used it as a tone-sculpted boost on my tube amp, holy moly. It pushes the amp into a glorious overdrive. I like it more than any OD pedal I have.