dbx 540 - Tube Mic Preamp - Used  From dbx

The dbx 540 features a Class A tube preamplifier, switchable phantom power, phase invert, selectable -20dB pad, and a super fast in-line optical compressor. The front panel includes a TRS microphone input - a standout feature typically not found on 500-series preamps.

The easy-access interchangeable 12AX7 preamp tube allows you to experiment with a variety modern and vintage tubes to customize the 540’s sound and performance to your taste. The switchable (in/out) compressor provides adjustable attack and release, and when it’s in use, the on-board VU meter automatically changes from displaying master level to amount of gain reduction, so you can view the exact results of the compression being applied. Editing is done using our smooth, responsive hand-machined controls. And last but not least: The dbx 540’s audio circuit uses LME49720 ultra-low distortion/low noise Op Amps, for superb audio output.

FEATURES

Suitable for use in all 500-series-compatible systems

12AX7 electron tube

Class A transformerless high voltage signal path

Adjustable optical compressor

Switchable phantom power

Switchable phase invert

Switchable -20dB pad

Dual-function VU meter: master volume / gain reduction

Input gain control

Output volume control