2-channel VCA compressor. Switchable signal path with CineMag USA input and output transformers. SSL G Series replica. External side chain input switchable. Switchable high-pass filter: 30, 60, 105, 125, 185 Hz. Compressor bypass switchable for easy A/B comparison. Built-in power supply. The Warm Audio BUS-COMP is a purely analog 2-channel stereo VCA compressor based on a classic circuit that has provided a silky sound for decades. Stereo VCA compressors are masterful in controlling the dynamics of many sources, but they are widely known for their "magical touch" on stereo mixes. The BUS-COMP is excellent for stereo mixes, drum submixes and overheads, acoustic guitars, keyboards, piano, orchestral instruments, voice-over, and many other sources. The BUS-COMP is primarily designed for stereo operation but can also be successfully used with mono signals. As a VCA compressor, it effortlessly controls dynamics while adding sound and depth to the audio signal even in bypass mode. The development of the BUS-COMP focused on the re-engineering of the legendary VCA compressor technology, while also considering the expansion of control options and sound choices. A standout feature of the BUS-COMP is the input and output transformers, which are driven by fully discrete operational amplifiers. By pressing a button on the front panel, these Cine-Mag USA transformers, made for Warm Audio, are switched into the signal path, providing more depth, sound, and vibe.