Syntherjack has designed a tiny portable mixer called the 4-sum, ideal for those diminutive noise-maker setups.
Featuring a four mono inputs and one headphone output, the mini-mixer boasts a very long battery-life of around 100 hours, which can be doubled with a lithium battery.
The unit comes unassembled, so will require you to flex the flux and warm-up the soldering iron. The upshot of being a DIY project is that costs are kept to a minimum.
One caveat though is that the 4-sum looks like it won’t be much use for Eurorack, as it’s unable to handle such hot signals.
- 4x mono inputs
- 1x headphone (dual mono) output
- Long battery life – average 100 hours (up to 200 hours with lithium battery)
- Low noise
- Output in phase with input
- Highest quality components
- Designed for portability
- LED power indicator