Warm Audio BUS-COMP Stereo VCA Bus Compressor
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Description
The Warm Audio BUS-COMP is an all-analog, 2-channel stereo VCA bus compressor designed for mix bus, drums, vocals, and instrument groups. Built around premium THAT 2180 VCAs and a discrete op-amp stage, the BUS-COMP delivers smooth, transparent compression that glues stereo mixes together with the polished cohesion associated with classic large-format console dynamics.
CineMag Transformer Insert
A front-panel switch inserts custom CineMag USA input and output transformers into the signal path, driven by fully discrete op-amps. This adds harmonic depth and analog color to the compressed signal, providing a quick way to switch between transparent and transformer-colored compression without repatching.
Dynamics Control
- Sidechain high-pass filter: Selectable 30, 60, 105, 125, 185 Hz prevents low frequencies from triggering compression
- External sidechain input: XLR for key-input triggering from a separate source
- Compressor engage switch: Instant A/B comparison between compressed and uncompressed signal
Stereo and Dual-Mono Operation
In stereo linked mode, both channels track together for matched gain reduction, keeping the stereo image centered under compression. Disengaging the link enables independent dual-mono operation, allowing two separate sources to be compressed with individual threshold, ratio, attack, and release settings on a single 1U chassis.
Specifications
- Type: 2-channel stereo VCA bus compressor
- VCAs: THAT 2180
- Transformers: CineMag USA (switchable insert)
- Frequency response: 18 Hz - 22 kHz
- Dynamic range: >120 dB
- Noise: <-90 dBu
- Headroom: >+29 dBu
- THD+N: <0.05% (20 Hz - 20 kHz, +20 dBu input)
- Input impedance: 10k Ohms
- Output impedance: 50 Ohms
- Inputs: 2x XLR, 2x 1/4" TRS (balanced)
- Outputs: 2x XLR, 2x 1/4" TRS (balanced)
- Sidechain input: 1x XLR (mono)
- Power: Built-in supply, IEC inlet
- Rack size: 1U, 19"
- Dimensions: 483 x 44 x 241 mm (19.0 x 1.75 x 9.5")
- Weight: 5 kg (10.2 lb)
In the Box
- Warm Audio BUS-COMP
- IEC power cable