Warm Audio WA-2A Tube Optical Compressor / Limiter

The Warm Audio WA-2A is a mono optical compressor / limiter with tube electronics, inspired by the classic Teletronix LA-2A first introduced in the 1960s. The control layout, like the original, is as simple as can be -- just threshold ("Peak Reduction") and gain makeup ("Output Gain") with switchable ratio for compression and limiting.