Locomotive Audio WT-COMP – Weight Tank Vari-Mu Tube Compressor
OVERVIEW
The Locomotive Audio WT-COMP Weight Tank Compressor is designed to leave a lasting sonic imprint on your recordings. Inspired by the lush sound of vari-mu tube compression, it delivers smooth, musical dynamics control while infusing tracks with warmth, presence, and analog character. Run vocals, drums, guitars, or full mixes through the WT-COMP, and you’ll instantly hear its ability to thicken and energize your sound.
At the heart of the WT-COMP are two vacuum tubes and three all-steel transformers, providing the foundation for its signature tone. With variable attack and release controls, a stereo link option, and custom backlit metering, it’s equally at home in creative tracking or mix bus applications. Switch between “Round” mode for sweet, pure tones and “Drive” mode for rich saturation and harmonic excitement, making the WT-COMP a flexible powerhouse for modern studios seeking weight, impact, and unmistakable analog vibe.
KEY HIGHLIGHTS
TRANSFORMERS:
Three all-steel transformers deliver big, thick, coloured results.
TUBE CIRCUITRY:
Audio passes through two vacuum tubes for smooth warmth.
CUSTOM METERING:
Backlit meter displays gain reduction accurately.
ATTACK & RELEASE:
Variable attack & release timing allows for great flexibility.
ROUND / DRIVE MODES:
When run in “Round” mode, a smooth, sweet, and pure tone will result. If switched to “Drive” mode, an enhanced harmonic structure and overall driven tone will result.
FEATURES
- XLR input and output connections
- Stereo Link 1/4″ TS jack on rear
- 6BC8 and 12AU7 tubes
- Stereo Link switch
- Hard-wire bypass switch
- 6BC8 balance adjustment on the interior of the unit
- Custom backlit Gain Reduction Meter
- Steel input, interstage, and output transformers
- Hand-built in the USA
- Heavy 16-gauge steel chassis
- 115v/230v AC mains option on rear
- 2-year warranty on parts and labor
TECHNICAL SPECS
Tubes: (1) 6BC8, (1) 12AU7
Input Load Impedance: 5kΩ
Output Impedance: < 1kΩ
Variable Attack: (12 mS – 50 mS)
Variable Release: (200 mS – 2 Sec)
Compression Ratio: 3.5:1
Frequency Response: 20Hz-20kHz
THD+N: < 1% Round || > 5% Drive
S/N Ratio: > 70dB
Power Consumption (120/240VAC): 25 watts
Dimensions (2U Rackspace):
- Width — 19″
- Height — 3.5″
- Depth — 10″
Shipping Weight: 20 lbs.








