Radial Engineering PROMS2

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True to the Music

Radial Engineering Ltd.

True to the Music

USER GUIDE

Radial Engineering Ltd.

ProMS2

Microphone Splitter ProMS2

Microphone Splitter

FEATURES

1. -30dB PAD: Allows balanced +4dB

line-level sources to connect to the

ProMS2 input.

2. Mic input: Used to connect a low

impedance, balanced, microphone or

direct box.

3. Direct-1 thru: A parallel direct

output used to bridge the mic or DI to

the primary mixing console.

4. Bookend design: 14 gauge steel

outer shell creates protective zone

around connectors and switches.

5. Full-bottom no-slip pad: This

provides electrical isolation and

plenty of ‘stay-put’ friction to keep the

ProMS2 in one place.

6. Direct-2 output: Equipped with

ground lift. Used to bridge the signal

to an additional audio device.

7. Lift (Direct-2): Disconnects

pin-1 (ground) on the direct-2 XLR

output to help reduce hum and buzz

caused by ground loops.

8. Isolated output: Transformer-

isolated to eliminate ground loop hum

and buzz. Used to bridge the balanced

mic signal to a second audio system.

9. Lift (Isolated output): Disconnects

pin-1 (ground) on the isolated XLR

output to help further reduce hum and

buzz caused by ground loops.

10. Steel I-beam: Enclosure

eliminates stress that could torque

the PC board.

11. Military-grade PCB: Double-

sided PCB with plated through-holes

is bolted to welded steel standoffs.

12. Eclipse: High performance mic

bridging transformer offers outstanding

audio performance. Features

mu-metal shield for protection against

stray electromagnetic ﬁ elds.

96 7 8

1 52 3 4

10 11 12

RADIAL ENGINEERING 3 YEAR TRANSFERABLE LIMITED WARRANTY

RADIAL ENGINEERING LTD. (“Radial”) warrants this product to be free from defects in material and

workmanship and will remedy any such defects free of charge according to the terms of this warranty.

Radial will repair or replace (at its option) any defective component(s) of this product (excluding ﬁ nish and

wear and tear on components under normal use) for a period of three (3) years from the original date of

purchase. In the event that a particular product is no longer available, Radial reserves the right to replace

the product with a similar product of equal or greater value. In the unlikely event that a defect is uncovered,

please call 604-942-1001 or email service@radialeng.com to obtain an RA number (Return Authorization

number) before the 3 year warranty period expires. The product must be returned prepaid in the original

shipping container (or equivalent) to Radial or to an authorized Radial repair center and you must assume

the risk of loss or damage. A copy of the original invoice showing date of purchase and the dealer name

must accompany any request for work to be performed under this limited and transferable warranty. This

warranty shall not apply if the product has been damaged due to abuse, misuse, misapplication, accident

or as a result of service or modiﬁ cation by any other than an authorized Radial repair center.

THERE ARE NO EXPRESSED WARRANTIES OTHER THAN THOSE ON THE FACE HEREOF AND

DESCRIBED ABOVE. NO WARRANTIES WHETHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT

LIMITED TO, ANY IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR

PURPOSE SHALL EXTEND BEYOND THE RESPECTIVE WARRANTY PERIOD DESCRIBED ABOVE OF

THREE YEARS. RADIAL SHALL NOT BE RESPONSIBLE OR LIABLE FOR ANY SPECIAL, INCIDENTAL

OR CONSEQUENTIAL DAMAGES OR LOSS ARISING FROM THE USE OF THIS PRODUCT. THIS WAR-

RANTY GIVES YOU SPECIFIC LEGAL RIGHTS, AND YOU MAY ALSO HAVE OTHER RIGHTS, WHICH

MAY VARY DEPENDING ON WHERE YOU LIVE AND WHERE THE PRODUCT WAS PURCHASED.

ProMS2

™

Speciﬁ cations and appearance are subject to change without notice.

Radial Engineering Ltd.

1588 Kebet Way, Port Coquitlam BC V3C 5M5

tel: 604-942-1001 • fax: 604-942-1010

info@radialeng.com • www.radialeng.com

Audio circuit type: Passive mic splitter, transformer based

Number of channels: Three-way splitter (one in/three out)

Frequency response: 20Hz ~ 20KHz

Dynamic range: 140dB

Maximum input: +25dBu @ 1kHz

Harmonic distortion: 0.005% @ 1kHz

Phase deviation: 1° @ 100Hz; 4° @ 20Hz

CMRR: 114dB @ 60Hz

Input impedance: 150 Ohms, balanced

Output impedance: 150 Ohms, balanced

XLR output: AES standard pin-1 Ground, pin-2 (+), pin-3 (-)

Ground lift: Lifts pin-1 on the XLR output

ProMS2 SPECIFICATIONS

Need help?

Do you have a question about the Radial Engineering PROMS2 and is the answer not in the manual?

Summary

Radial Engineering 3 Year Limited Warranty

Connecting and Using the PROmS2

Isolated Output

Details the isolated output's function and connection for ground lift.

Direct-to-Output

Explains using the direct-to-output for a clean signal path.

J-RAK and J-CLAMP

Describes Radial's J-RAK rackmount chassis and J-CLAMP.

The Radial ProMS2 is a balanced microphone splitter designed to distribute mic signals to multiple audio systems, commonly used in sound reinforcement for feeding house PA and monitor consoles, or in studios for multi-preamp setups and live broadcasts.

Function Description

The ProMS2 takes a single microphone or line-level input and splits it into three outputs:

DIRECT-1 thru-put: A parallel direct output that allows 48V phantom power from the primary mixing console to feed condenser microphones or active direct boxes.
DIRECT-2 output: An identical thru-put to DIRECT-1, but equipped with a ground LIFT switch to reduce ground loop noise. This output can be used to send a balanced, mic-level signal to an alternate device such as a recording system.
ISOLATED output: A transformer-isolated output designed to eliminate ground loop hum and buzz. It employs a high-performance Eclipse mic bridging transformer and is equipped with a ground LIFT switch to decouple the signal ground. This output is typically used for a second mixing console or recording system.

Important Technical Specifications

Audio circuit type: Passive mic splitter, transformer-based.
Number of channels: Three-way splitter (one in/three out).
Frequency response: 20Hz ~ 20KHz.
Dynamic range: 140dB.
Maximum input: +25dBu @ 1kHz.
Harmonic distortion: 0.005% @ 1kHz.
Phase deviation: 1° @ 100Hz; 4° @ 20Hz.
CMRR: 114dB @ 60Hz.
Input impedance: 150 Ohms, balanced.
Output impedance: 150 Ohms, balanced.
XLR output: AES standard pin-1 Ground, pin-2 (+), pin-3 (-).
Ground lift: Lifts pin-1 on the XLR output.

Usage Features

-30dB PAD: Allows balanced +4dB line-level sources to connect to the ProMS2 input, making it compatible with line-level devices by attenuating the signal to match microphone levels for preamp inputs.
Mic input: Used to connect a low impedance, balanced, microphone or direct box.
Direct-1 thru: A parallel direct output used to bridge the mic or DI to the primary mixing console.
Direct-2 output: Equipped with ground lift. Used to bridge the signal to an additional audio device.
Lift (Direct-2): Disconnects pin-1 (ground) on the direct-2 XLR output to help reduce hum and buzz caused by ground loops.
Isolated output: Transformer-isolated to eliminate ground loop hum and buzz. Used to bridge the balanced mic signal to a second audio system.
Lift (Isolated output): Disconnects pin-1 (ground) on the isolated XLR output to help further reduce hum and buzz caused by ground loops.
Passive operation: The ProMS2 is completely passive and does not require a power supply to work.
Bookend design: 14 gauge steel outer shell creates a protective zone around connectors and switches, enhancing durability.
Full-bottom no-slip pad: Provides electrical isolation and plenty of 'stay-put' friction to keep the ProMS2 in one place.
Steel I-beam enclosure: Eliminates stress that could torque the PC board.
Eclipse transformer: High-performance mic bridging transformer offers outstanding audio performance with a mu-metal shield for protection against stray electromagnetic fields.

Maintenance Features

Military-grade PCB: Double-sided PCB with plated through-holes is bolted to welded steel standoffs, ensuring robust construction.
RADIAL ENGINEERING 3 YEAR TRANSFERABLE LIMITED WARRANTY: Radial warrants the product to be free from defects in material and workmanship for three years from the original date of purchase. Radial will repair or replace defective components free of charge. The warranty does not cover damage due to abuse, misuse, misapplication, accident, or unauthorized service/modification. To obtain service, an RA number must be acquired from Radial Engineering Ltd.

Accessories

J-RAK 8: An optional 19" rack chassis that mounts up to eight Radial devices in a 2RU rackmount package, allowing for high-density groups of direct boxes and mic splitters for studio or live touring.
J-RAK 4: An optional 19" rackmount chassis that packages four Radial devices in one rack space (1RU).
J-CLAMP: An optional mounting device that allows a single Radial device to be mounted to virtually any surface, ideal for discreet placement under tables or in podiums.