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Hazelrigg Industries

Hazelrigg Industries VNE

single-channel tube PWM compressor

Compressor / Limiter

$4,500Manufacturer list price

Specifications

Type
Compressor / Limiter
Description
single-channel tube PWM compressor
Topology
tube/valve, transformer-coupled, Class-A
Signal path
Analog
Channels
1
Channel format
balanced XLR line level
Form factor
rackmount
Rack units
2
Powered
true
Power (W)
25
Frequency response
20Hz-20kHz ±0.5dB (spec); -3dB at 5Hz and 65kHz
Impedance (Ω)
Input 32k; output drives 20k+ bridging load
Country of manufacture
USA

Details

Controls: Threshold, Attack, Release, Gain (output level), 3-way rotary switch (bypass/compression/HPF mode), high-pass filter (~100Hz)

I/O: Rear-panel balanced XLR line input and output; front-panel output level indicator; IEC mains

Notable use: Used by Dom Morley, Wes Maebe, Brian Moncarz and others, primarily on vocals, per manufacturer site

Notes: Single-channel all-tube Class-A PWM (Pulse Width Modulation) compressor, circuit derived from the D.W. Fearn VT-7 (flagged D.W. Fearn heritage). Gain reduction range 15dB max, THD <0.07% (site) / 0.04% at nominal (Sound on Sound), SNR >80dB. Four 6072A dual-triode tubes; Jensen input transformer, custom output transformer (Sound on Sound). Weight 5.6kg/12.5lbs, 2U rack (Sound on Sound review, not on manufacturer page). Price $4,500 consistent across Sweetwater/Reverb/Alto Music (2026); Sound on Sound (2022) cited ~$4,395/£4,395 basis. Note: this is the rack version; DNE below is the 500-series module derived from the same compression circuit.

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