The A-138n is a compact 4-channel mixer from Doepfer’s slim line series, designed for mixing control voltages or audio signals. Each of the four inputs features an individual attenuator, and the output is provided via two normalled jacks, allowing for quick and flexible patching.

Thanks to its narrow 4HP width, it’s ideal for smaller setups or as a sub-mixer within larger systems. Simple, reliable, and efficient.