DM Engineering MIC PRO 2 Users Guide

USER GUIDE

DM Engineering Mic Pro 2

“Stand Alone” Microphone ON/OFF Lighted Pushbutton

Module

Version 1.2

DM Engineering

2174 Chandler St.
Camarillo, CA 91345-4611
805-987-7881 800-249-0487
www.DMEngineering.com

Overview:

The "MIC PRO 2" ON/OFF LED lighted and silent switching module will upgrade a
low cost production mixing board to have the microphone switching features of a
professional broadcast console. High reliability and silent LED lighted "MIC ON" and
"MIC OFF" buttons enable and disable the mic channel so the mic level control can
be left at its optimum setting.

As many microphone channels as your production board has "Insert" jacks for can
now be individually controlled by it's own "MIC PRO 2", and is ideal for home studio
applications and professional studio control of individual microphones for round
table, interview room, or conference room applications where a single operator or
multiple guests can control their own microphones.

An optional “Y” adapter may be purchased from DM Engineering if other processing
equipment such as a Mic Processor is already connected to the “Insert” jack to
interface the Mic Pro 2 with the current installation.

Each "MIC PRO 2" also provides a logic low output for interfacing with the DM
Engineering Studio SLAVE Auxiliary Relay Pack and Solid State Relay Pack or the
HE Superelay if desired. The SLAVE or Superelay control output pair is taken from
the “Control” and “Common” terminals. For activating the DM Engineering Studio
Solid State Relay Pack or other solid state relay that operates at 9-12VDC input
range, connect to the “Control” and the “+9 to 2VDC” terminals. Multiple "MIC PRO
2" outputs may be paralleled to control one or more SLAVE Relay Packs for
controlling studio muting or one or more Studio Solid State Relay Packs for
controlling ON AIR and RECORDING sign functions.

The "MIC PRO 2" is powered by either the supplied DC power supply module, the
Studio SLAVE Auxiliary Relay Pack or Superelay, if used. As many as 5 "MIC PRO
2" switching modules can be powered by one power supply module, Studio SLAVE
or Superelay.

The "MIC PRO 2" may be attached to the side of the production board as shown or it
may also be secured to table tops or any other location desired using the supplied
hook and loop fastener system, or for a more permanent solution, use the supplied
double sided tape. Each "MIC PRO 2" is supplied with a standard 6 foot "Insert"
cable. 12 foot cables are supplied as an option at an additional cost.

Operation:

Pressing the “MIC ON” button activates the “MIC PRO 2” in a latched on condition
and completes the tip and ring connection of the “Insert” jack. Pressing the “MIC
OFF” button deactivates the “MIC PRO 2” and disconnects the tip and ring
connection of the “Insert” jack. When the unit is in the “OFF” condition it also
connects the input of the line level bus input amplifier to ground through a 1K ohm
terminating resistor to assure noise free operation. A logic low signal is applied to
the Control terminal of the “MIC PRO 2” while in the “MIC ON” condition for
interfacing with the DM Engineering SLAVE Relay Pack or Henry Engineering
Superelay, or Solid State Relay Pack if desired. This output is both diode and
resistively protected to permit multiple “MIC PRO 2” module Control outputs to be
connected together in parallel for external device control by multiple units. (Speaker
muting, lighting of “Recording” or “On Air” signs and control of any other devices is

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accomplished by an external Studio SLAVE Relay Pack and/or the Solid State Relay
Pack.)

Installation:

1. Clean the side of the mixing board, table top or other surface where the
“MIC PRO 2” and cable anchors are to be located with the supplied alcohol
swab to remove any residual dirt or grease. This particularly applies to
“powder coated” painted surfaces.

2. Attach the “MIC PRO 2” module where desired using either the permanent
adhesive squares or the hook & loop fasteners. Route the control cables
and secure with the supplied cable ties and anchors.

3. Connect power to the terminal block located on the bottom of the “MIC PRO
2” module. If using the available 9VDC @ 200ma power supply module
from DM Engineering, connect the lead with the white stripe to the “+”
terminal and the other lead to the “Common” terminal using a small slot
screwdriver. If you are using a Studio SLAVE Relay Pack or other power
source, make sure that the polarity of the supply voltage is properly
connected as marked to avoid possible damage to the unit. The Supply
voltage should be in the range of 9-12VDC and requires approximately
45ma maximum per “MIC PRO 2”

4. If external devices such as the Studio SLAVE Relay Pack are to be
controlled by a negative going logic level, connect the Mic Pro 2 “Control”
and the “Common” terminals to the “Continuous” and “Common” terminals
respectively of the Studio Slave Relay Pack or Superelay. Be sure to
observe polarity for proper operation. For activating the DM Engineering
Studio Solid State Relay Pack or other solid state relay that operates at 9­12VDC input range, connect to the “Control” and the “+9 to 12VDC”
terminals.

5. Attach the supplied Insert control cable (3.5mm stereo plug end) to the

“Insert” jack on the side of the “MIC PRO 2”. Connect the other end of the
cable (1/4” stereo plug end) to the desired microphone “Insert” jack on the
mixing board.

6. If other processing equipment is already connected to the “Insert” jack on
the mixing board, you may obtain an optional “Y” cable from DM
Engineering for the ability to interface the Mic Pro 2 with your processing
equipment.

7. Connect any additional “MIC PRO 2” power input leads, “Insert” cables, and

“Control” cables to the desired “Insert” jacks and external device terminals
as described in steps 3-5.

Warranty Information:
The DM Engineering MIC PRO 2 is warranted for a period of one year from the date
of purchase. This warranty covers materials and workmanship only. Any
misapplication, physical, cosmetic or electrical damage from outside sources or by
the customer is not covered. The customer must pay shipping costs to the factory,
and DME will pay shipping costs to return the warranted equipment to the customer.
Any priority shipping costs are to be the responsibility of the customer as ground
service is standard. Please contact the factory for an RMA number prior to any
returns. Items returned without an RMA may be sent back to the customer
unopened.

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Technical Support

If you have questions, experience difficulties with the product or require further
information please contact DME at: 805-987-7881, toll free 800-249-0487, or E-mail
technical support at: [e-mail], or visit
www.DMEngineering.com for the latest User Guide.

Specifications:

Case dimensions: 2.6" wide X 3.0" deep X 1.1" high
Case material and color: Styrene plastic, light grey
Power input and control output connection method: Eurostyle screw terminal block
DC input requirement: 9-12VDC @ 45ma maximum. (Supplied by included power
supply module or external Studio SLAVE Relay Pack or equivalent.)
Mounting: Hook and loop fasteners or double sided tape (supplied)
Control output: Logic low upon activation or Mic ON condition, series diode and
resistively protected
Operating temperature: 32 to 120F
Humidity: 0 to 95% non-condensing
Shipping Weight: 1 lb. (approximate)

Supplied Materials:

“MIC PRO 2” module
9Volt Power Supply Module
One 6 ft. insert cable assembly with connectors (12 ft. cables are available from DM
Engineering for an additional cost.)
Hook and loop fastener materials for removable installation
Double sided adhesive pads for non-removable installation
Alcohol swab
Cable ties, clips, and tie anchors
This User guide

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