Front panel of a rackmount audio device with four mic gain sections and a VU meter on the right end.

UNDERTONE AUDIO MPDI-4 — Microphone

$5,645.00
$5,645.00
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Front panel of a rackmount audio device with four mic gain sections and a VU meter on the right end.
  • Front panel of a rackmount audio device with four mic gain sections and a VU meter on the right end.
  • UNDERTONE AUDIO MPDI-4 — Microphone, studio recording microphone body
  • UNDERTONE AUDIO MPDI-4 — Microphone, studio recording microphone body
  • Front panel of a rackmount audio device with four mic gain sections and a VU meter on the right end.
  • UNDERTONE AUDIO MPDI-4 — Microphone, studio recording microphone body
  • UNDERTONE AUDIO MPDI-4 — Microphone, studio recording microphone body
UNDERTONE AUDIO MPDI-4 — Microphone

UNDERTONE AUDIO MPDI-4 — Microphone

Undertone Audio MPDI-4 is a four-channel microphone preamp and DI in a single 1RU chassis. The manufacturer lists four independent mic preamp/DI circuits with front-panel XLR/1/4-inch combo inputs, mic-pre direct XLR outputs, +48 V phantom power, phase reverse, a switchable -20 dB input pad and -10 dB output pad.

$5,645.00
$5,645.00
Condition Brand New
Specs Verified model facts
Checked against 1 listing
Verified
Use Tracking engineers who need four channels of rackmount mic preamp/DI with per-channel transformer, pad, load and impedance options.
Requires appropriate audio and data cables, compatible monitoring, mounting, or power setup
In stock Ask a question

Specifications

+48 V phantom power

Format

Channels 4 independent mic preamp/DI channels
Rack format 1RU 19-inch rackmount chassis
Circuit features Bypassable input and output transformers with switchable output headroom and adjustable THD behavior

Controls

Gain range -10 to -60 dB boost range in stepped 5 dB increments
Input pad Switchable -20 dB input pad
Output pad Switchable -10 dB output pad
Phantom power +48 V phantom power
Phase Phase reverse switch
Output load Switchable 600 ohm output load
Low impedance mode Switchable low-impedance mode intended for passive ribbon microphones

Connectivity

Front inputs Front-panel XLR / 1/4-inch DI combo input per channel
Outputs Mic-pre direct line outputs on XLR

Electrical

Input voltage 110-120 / 220-240 VAC, 60/50 Hz reported by retailer listing
Di impedance 4.7 Mohm reported by retailer listing
Output impedance Mic output 47 ohm reported by retailer listing
Frequency response Mic preamp 10 Hz to 80 kHz reported by retailer listing

Fit and constraints

Tracking engineers who need four channels of ra… · +48 V phantom power

Intended use

Use Tracking engineers who need four channels of rackmount mic preamp/DI with per-channel transformer, pad, load and impedance options.
Not for Users needing built-in EQ, digital conversion, remote recall/automation, or more than four channels in a single unit.

Constraints

Power+48 V phantom power
ControlsGTIN, full chassis dimensions and verified unit weight were not available on accessible...

To use it

Required appropriate audio and data cables, compatible monitoring, mounting, or power setup

Questions

3 to ask before buying

Which connections, drivers, operating systems, and sample rates are supported by this exact revision?

Ask before you buy via contact. Confirm power, condition grade, and included items against the listing photos.

What cables, mounts, power supplies, or licenses are included?

Ask before you buy via contact. Confirm power, condition grade, and included items against the listing photos.

Is the current retailer listing new stock, demo stock, open box, or special order?

Ask before you buy via contact. Confirm power, condition grade, and included items against the listing photos.

Description

Product details

Undertone Audio MPDI-4 is a four-channel microphone preamp and DI in a single 1RU chassis. The manufacturer lists four independent mic preamp/DI circuits with front-panel XLR/1/4-inch combo inputs, mic-pre direct XLR outputs, +48 V phantom power, phase reverse, a switchable -20 dB input pad and -10 dB output pad. Gain is stepped from -10 to -60 dB in 5 dB increments, and each channel includes a switchable 600 ohm output load plus a low-impedance mode intended for passive ribbon microphones. The design includes bypassable input and output transformers and adjustable THD/headroom behavior, allowing clean or more harmonic operation depending on settings. Retailer corroboration lists the product as a 19-inch 1U rackmount and gives MFR# MPDI-4. Accessible pages did not publish a GTIN, exact dimensions beyond 1U rack format, or verified unit weight.

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