Check the listing for details. API TranZformer CMP Compressor Pedal. Condition: New. Listed at 295.00 USD. Classic API Compression for Your Pedalboard The API TranZformer CMP will equip your pedalboard with the same studio-quality dynamics processing that launched a thousand hit records. This guitar effects pedal abounds with signature API sound, courtesy of a 527 VCA-style compressor circuit, a 2510 op-amp, and a muscular-sounding transformer output. What's more, this stompbox was engineered for high-performance operation with a standard 9-volt power supply. The TranZformer CMP offers both feed-forward and feedback compression for added sonic versatility, along with adjustable attack and release times and an ultra-useful dry/wet knob. The TranZformer CMP boasts high-quality buffered bypass switching to ensure an optimal signal, even if your rig includes arena-sized cable runs.