Hazelrigg Industries DVA Vacuum Tube Microphone Preamplifier / DI

The Hazelrigg Industries DVA brings the input topology of the Hazelrigg VLC and D.W. Fearn VT-2 preamplifiers into the 500-series format, built around a single 6072a vacuum tube. The input stage mirrors the VLC and VT-2 circuit exactly, with transformers at both input and output stages, while makeup gain is handled by a low-THD solid-state signal path sized for 500-series power and space constraints. The combination yields approximately 60dB of total gain, a front-panel instrument DI, and a tube input character that traces directly back to D.W. Fearn’s original amplifier design. Providence Sound And Vision carries the Hazelrigg Industries DVA in Los Angeles for engineers and producers who want a genuine tube input stage in a compact, rack-ready 500-series module.

Key Features

• Hybrid Tube / Solid-State Topology — A single 6072a vacuum tube drives the input stage, matched exactly to the VLC/VT-2 circuit, with a low-THD solid-state path handling makeup gain for clean, high-output performance within the 500-series format.
• D.W. Fearn-Designed Amplifier Stage — The DVA’s amplifier circuit was designed by D.W. Fearn, the same engineer behind the VT-2 preamplifier, bringing that lineage directly into the 500-series ecosystem.
• Input and Output Transformers — Transformers at both stages contribute to the DVA’s character and help isolate the circuit from external interference.
• Front-Panel Mic / Instrument Input — A combined mic and instrument input on the front panel allows direct DI recording without additional hardware.
• –20dB Pad — Handles high-output microphones cleanly; engaging the pad with an attenuated source signal also allows users to push the input stage for additional harmonic character.
• +48V Phantom Power — Switchable phantom power with LED indicator for condenser microphone use.
• Polarity Reversal Switch — Corrects phase relationships at the source without requiring any downstream adjustment.
• Switchable High-Pass Filter — Reduces low-frequency buildup at the input stage for cleaner recordings in acoustically challenging environments.
• Output Indicator LED — At-a-glance signal monitoring on the front panel.

Specifications

• Format: 500-series module
• Tube: 6072a (single)
• Topology: Hybrid — vacuum tube input stage, solid-state makeup gain
• Total Gain: Approximately 60dB
• Input Transformer: Yes
• Output Transformer: Yes
• Input: XLR mic; front-panel instrument DI
• Pad: –20dB switchable
• Phantom Power: 48V switchable, with LED indicator
• Polarity Reversal: Yes
• High-Pass Filter: Switchable
• Metering: Output indicator LED
• Warranty: 1 Year
• Condition: Open Box

Preowned at Providence Sound And Vision

This Hazelrigg Industries DVA is open box, fully inspected and verified by Providence Sound And Vision before reaching the shelf. It carries the same 7-day risk-free return policy and lifetime support that Providence Sound And Vision extends on every piece of gear it sells.