EQ and boost pedals don't add a new effect. They change how loud your signal is, and which frequencies are loudest. That sounds dull, but they solve more tone problems than any other pedal.
EQ pedals
A graphic EQ has a row of sliders, each one a fixed frequency band. Boss and MXR both make classic ones. You see the curve you're making at a glance, which makes it quick to use.
A parametric EQ has fewer bands, but you choose the exact frequency and how wide each band is. It's more precise and takes longer to learn.
Two jobs EQ does well:
- Cut mud. If your sound is boomy or muddy in the band, find the low-mid slider (roughly 200 to 400 Hz), push it up to hear the problem clearly, then pull it below zero until the sound clears. Cutting usually sounds more natural than boosting.
- Push solos forward. A gentle lift around 800 Hz to 1 kHz plus a little extra level helps a lead cut through without just getting louder.
Three kinds of boost
| Boost | What it adds | Typical use |
|---|---|---|
| Clean boost | Level, same tone | Louder solos, hitting an amp harder |
| Treble booster | Level plus a sharp upper-mid lift | Pushing a vintage amp into bright, cutting grind |
| Mid boost | Level plus a mid hump, often trimmed bass | Making solos sing and sit in front of the band |
The Dallas Rangemaster is the famous treble booster, commonly associated with Brian May and early Tony Iommi. Many overdrives used at low gain, such as a Tube Screamer, work as mid boosts.
Before or after the drive?
This is where boost gets interesting.
- Boost before drive: the drive gets a hotter signal, so you get more gain and saturation, plus a slight volume bump. Great for turning a rhythm crunch into a lead tone.
- Boost after drive: the drive's character stays the same, it's just louder. Great when your solo tone is already right and you only need to be heard.
An EQ follows the same logic. Before the drive, it changes how the drive reacts (cut bass to tighten it). After the drive, it shapes the final tone like the amp's tone controls.
A good starting point: set your boost so it adds about 3 to 6 dB, enough to notice, not enough to shock the sound engineer.