6-Band EQ (Potentiometer Version) Drill Template
PedalPCB · 125B
Template details
- Circuit
- 6-Band EQ (Potentiometer Version)
- Vendor
- PedalPCB
- Enclosure
- Hammond 125B
- Dimensions
- 63.6 × 119.3 × 35.8 mm
- Layout
- 125B 6-Knob (Type 1)
- Category
- EQ
Export formats
- PDF: print at 1:1 scale
- SVG: vector graphic
About this drill template
Drill template for the PedalPCB 6-Band EQ (Potentiometer Version), sized for a Hammond 125B enclosure (63.6 × 119.3 × 35.8 mm). The pre-positioned holes match the PCB's pot footprint exactly, with the footswitch centred below the 6-knob layout. Print at 1:1 scale, tape to the enclosure face, centre-punch, and drill. PCB and parts not included.
PedalPCB's 6-Band EQ built with pots instead of sliders, covering 100Hz to 3.2kHz in octave steps (the same band centres as the classic MXR six-band). Useful for a mid boost, an amp-style scoop, or taming a boomy fuzz.
Build notes
Six-knob layouts are about as much as a single-row enclosure comfortably fits: modulation depth, multi-band EQ, multi-stage compression all live here.
The Hammond 125B is one of the most common DIY pedal enclosures: a touch larger than a 1590B, slightly smaller than a 1590BB, with room for almost any single-effect PCB plus 9V supply.
Vendor specs: Designed for a 125B enclosure with top-mounted jacks
Controls
- 100Hz
- 200Hz
- 400Hz
- 800Hz
- 1.6kHz
- 3.2kHz
Drill measurements
Hole centres for the 125B 6-Knob (Type 1) layout. X runs left to right from the centre of the face being drilled. On the enclosure face, Y is measured from the centre, positive towards the top. For holes on a side, Y is the distance down the wall, measured from the face edge. Export the PDF for a 1:1 printable version with a scale check.
| Hole | Face | X (mm) | Y (mm) | Diameter |
|---|---|---|---|---|
| Pot | Enclosure face | -20.3 | 38.1 | 7 mm (0.28 in) |
| Pot | Enclosure face | 0 | 38.1 | 7 mm (0.28 in) |
| Pot | Enclosure face | 20.3 | 38.1 | 7 mm (0.28 in) |
| Pot | Enclosure face | -20.3 | 12.7 | 7 mm (0.28 in) |
| Pot | Enclosure face | 0 | 12.7 | 7 mm (0.28 in) |
| Pot | Enclosure face | 20.3 | 12.7 | 7 mm (0.28 in) |
| LED | Enclosure face | 0 | -27.3 | 6.4 mm (0.25 in) |
| Footswitch | Enclosure face | 0 | -45 | 12 mm (0.47 in) |
| DC Jack | Top side | 0 | 14.2 | 8 mm (0.31 in) |
| Jack | Top side | -15.2 | 24.3 | 9.5 mm (0.37 in) |
| Jack | Top side | 15.3 | 24.3 | 9.5 mm (0.37 in) |
Never drilled one before? How to drill a pedal enclosure walks you through the entire process, from punching the centres to the final step drill size.
Jig B covers 125B 6-Knob (Type 1)
Drop it over the enclosure, punch a mark through the holes this build uses, then lift it off and drill. It wraps onto the sides too, so the jacks and DC socket are covered.
See the jig pack, $12 →