DIY kit
RC2
Passive low-pass + high-pass filter
2 HPEurorackDIYPassive
Two simple 6 dB/oct passive filters in 2 HP — a low-pass to darken and a high-pass to thin out audio. The HP input is normalled to the LP input.
What's in the box
1 × RC2 PCB (black)
1 × RC2 front panel, 2 HP (black)
4 × 3.5 mm jack with nut
2 × potentiometer B100K, 9 mm
2 × resistor 1 kΩ 1 % metal film
2 × ceramic capacitor (4.7 nF, 100 nF)
2 × M3 mounting screws
All through-hole parts — no SMD soldering. About 30–45 minutes of soldering.
Features
- Low-pass: approx. 670 Hz – 17 kHz
- High-pass: approx. 30 Hz – 800 Hz
- 6 dB/oct, passive RC design for audio
- HP input normalled to LP input — dark and bright versions of one signal
- Fully passive — no power cable needed
Specifications
| Filters | LP + HP, 6 dB/oct |
|---|---|
| Jacks | 4 (2 in, 2 out) |
| Controls | 2 × cutoff |
| Power | none (passive) |
| Format | Eurorack, 2 HP |
| Line | Berlin |
| Version | DIY kit |
User manual
Building the kit
Build guide: step-by-step assembly instructions.
Interactive BOM: the parts list with a map of the board. Click a part to see where it goes and tick off what you have already soldered.
