THIS OPERATING MANUAL IS PROVIDED AS AN INSTALLATION AND
AS AN OPERATING AID. MIEG CORPORATION and MEM AUDIO DOES NOT ASSUME ANY
RESPONSIBILITY AS TO ITS ACCURACY AND SHALL NOT BE LIABLE IN TORT OR CON-
TRACT FOR ANY DIRECT CONSEQUENTIAL OR INCIDENTAL LOSS OR DAMAGE ARISING
FROM THE INSTALLATION, USE OR INABILITY TO USE THIS PRODUCT.
MEM
INTEGRATED AMPLIFIERS
Installation Manual
and Operating Instructions
Manual
OM 333
MDM SERIES
3 Channel - VOX -MOH - Phone
and VoIP Interface
MD35M - 35 WATTS
MD60M - 60 WATTS
MD120M - 120 WATTS
IMPORTANT NOTE:
CAUTION !
TO REDUCE THE RISK OF FIRE OR ELECTRIC
SHOCK DO NOT EXPOSE THIS APPLIANCE TO
WATER, RAIN OR MOISTURE
© copyright 2018 MIEG CORPORATION Specifications are subject to change without notice
WWW.MEMAUDIO.COMSOUND IS BEAUTIFUL
REV. 1.1
Mic
Tel
Aux
VoIP 50
Mic
Aux/
(317.5x215.9x44.45mm)
(5.0 Kg)
MEM MDM
INTEGRATED AMPLIFIERS
DESCRIPTION AND APPLICATIONS SPECIFICATIONS
3 Channel Inputs
Wide Frequency Response
Very Low Distortion
Balanced Microphone Input
Phantom Power on MIC Input with Selector
Balanced Telephone Paging Input
VoIP Telephone paging Input
Tel and Mic Vox Sensitivity Control
Auxiliary Input With Stereo Summing
Auxiliary Input Gain
Independent Input Controls
Bass and Treble Controls
VOX - Voice Activated Muting
Direct Muting or Unmuting
12 Volt Accessory Power Output
600 ohm or 10K (VoIP) MOH Output
Power Output:
Distortion:
Frequency Response:
Inputs:
Input 1
Input 2
Input 3
Sensitivity & Z:
Input 1
Input 2*
Input 3
*
Hum & Noise:
Telephone Input:
Music on Hold Output:
Output Impedance:
Controls:
Front Panel:
Rear Panel
Phantom Power:
MOH Source:
Tone Control Action:
VOX:
Direct Muting:
MIC Unmuting:
35/ 60/ 120 Watts RMS
Less than 0.5% THD
20 - 20,000 Hz ± 2 db
Auxiliary
Microphone Balanced
Telephone Transformer Balanced
=1 Mv - 250 ohm balanced
=100 Mv - 600 ohm balanced
=200 Mv - 47K ohm
K ohm 100 Mv unbalanced
-70 db,
600 ohm Transformer balanced
600 ohm-1 Volt Transf. balanced
VoIP 10K - 1 Volt unbalanced
8 ohm, 25 Volt and 70 Volt line
AUX Volume, MIC Volume,
Telpage Volume, Bass, Treble
AUX Input Gain, MOH Level
MIC/ TEL Vox Sensitivity
On MIC Input w/internal jumper
AUX Input
+/-10 db at 100 Hz and 10 K hz
Voice Activated Muting
MIC/TEL mutes AUX Input
External Contacts
Mutes or Unmutes MIC Input only
-75 db
with Separate Output Level Control
8 ohm, 25 Volt & 70 Volt
Output Impedance
Rack Mounting with Optional Kits
UNPACKING
Immediately upon receipt of the amplifier, inspect the unit
and shipping container for indications of improper handling
or in transit damage. The equipment was carefully inspected and tested before leaving the factory. Notify the
Transportation Company immediately if any damage is
found. ONLY THE CONSIGNEE CAN FILE A CLAIM WITH
THE CARRIER FOR DAMAGE DURING SHIPMENT. Be
sure to save the carton and packing material as evidence of
damage for the shipper inspection. DO NOT SHIP the unit
back to the factory unless authorized by the factory.
IN TRANSIT DAMAGES ARE NOT COVERED BY THE
MEM WARRANTY.
Rack Mounting:
Power Requirement:
Power Consumption:
Terminations:
Housing Finish:
Dimensions:
Net Weight:
Optional Rack Kits
120 Volt, 50-60 Hz
110/ 230/ 600 VA
Phoenix Connectors, RCA Jacks
Black
12.5"W., 8.5"D., 1.75"H.
10.95 Lbs
ACCESSORIES
MRK 1 - Standard 19” Rack Mounting Kit. Black finish.
Complete with hardware
MRK 2 - Dual Amplifier 19” Rack Mounting Kit. Black finish.
Complete with hardware
MRK1 Rack Kit
MRK2 Rack Kit
PAGE 2
© copyright 2018 MIEG CORPORATION Specifications are subject to change without notice
MDM SERIES
BEFORE OPERATING THE AMPLIFIER, BE SURE YOU FULLY UNDERSTAND ALL INSTRUCTIONS AND FEATURES
OF THE APPLIANCE.
MEM MDM
INTEGRATED AMPLIFIERS
IMPORTANT SAFETY INSTRUCTIONS
READ BEFORE OPERATING READ BEFORE OPERATING
The lightning flash with arrowhead symbol, within an equilateral triangle, is intended to alert the user to the presence of uninsulated
“dangerous voltage” within the product’s enclosure that may be of
sufficient magnitude to constitute a risk of electric shock to persons.
CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN
The exclamation point within an equilateral triangle is intended to
alert the user to the presence of important operating and maintenance (servicing) instructions in the literature accompanying the
appliance.
CAUTION
13) Do not place this product on an unstable cart,
stand, tripod, bracket, or table. The product may fall,
1) Read these instructions carefully.
2) Keep these instructions.
3) Heed all Warnings.
4) Follow all instructions.
5) DO NOT use this apparatus near water.
6) Clean ONLY with a damp cloth.
7) DO NOT block any of the ventilation openings.
Install in accordance with the instructions provided.
8) DO NOT install near any heat sources such as
radiators, stoves, or other apparatus (including amplifiers) that produce heat.
9) DO NOT mount amplifier into a container or a
closed unventilated closet while operating.
10) DO NOT place any object or accessory equipment
such as Tuners, Mixers, Cassette Decks, etc. on top of
the amplifier. Obstructing or closing the cabinet ventilation openings may cause overheating.
11) DO NOT defeat the safety purpose of the polar-
causing serious injury to a person, and serious damage to the product. If a cart is used, use caution when
moving the cart/apparatus combination to avoid injury
from tip-over.
14) Unplug this apparatus during lighting storms or
when unused for long periods of time.
15) Refer all servicing to qualified service personnel only. Servicing is required when the apparatus has
been damaged in any way, such as power supply cord
or plug is damaged, liquid has been spilled or objects
have fallen into the apparatus, the apparatus has been
exposed to rain or moisture, does not operate
normally, or has been dropped.
16) DO NOT replace
removed from the AC wall outlet.
17) DO NOT install accessories unless the power
cord is removed from the AC wall outlet.
ized or grounding type plug. A polarized plug has two
blades with one wider than the other. A grounding type
plug has two blades and a third grounding prong. The
wide blade and or the third prong is provided for your
safety. When the
provided plug does not fit into your
WARNING: TO REDUCE THE RISK OF FIRE OR
outlet, consult a certified electrician for replacement of
the obsolete outlet.
12) Use only the attachments and accessories specified in this manual.
ELECTRIC SHOCK, DO NOT EXPOSE THIS
APPLIANCE TO RAIN OR MOISTURE. DAN-
GEROUS HIGH VOLTAGES ARE PRESENT
CAUTION:
TO REDUCE THE RISK OF ELECTRIC SHOCK,
DO NOT REMOVE COVER.
NO USER-SERVICEABLE PARTS INSIDE.
REFER SERVICING TO QUALIFIED SERVICE PERSONNEL.
fuses unless power cord is
WARNING
S3125A
MDM SERIES
SPECIFICATIONS ARE SUBJECT TO CHANGE WITHOUT NOTICE
INSIDE THE ENCLOSURE. DO NOT OPEN THE
CABINET. REFER SERVICING TO QUALIFIED
PERSONNEL ONLY.
PAGE 3
MEM
INTEGRATED AMPLIFIERS
MDM
FRONT PANEL CONTROLS
1 6
1) AUXILIARY Volume Control
2) MICROPHONE Volume Control
3) TELEPHONE Volume Control
2
REAR PANEL INPUTS - OUTPUTS
3 4 5
4) BASS Control
5) TREBLE Control
6) MASTER Volume Control
Fig. 4 - Front Panel Controls
10
9
8
7
7) POWER Switch 10) POWER Indicator
8) SIGNAL LEVEL Indicator
9) PROTECT Indicator
Fig. 4A - Rear Panel Inputs and Outputs
1) AC Power Cord
2) Chassis Ground Screw
3) 12 Volt Accessory Power Tap
4) Speaker Output
5) AUX Input
6) Mic Vox Circuit Off/On
7) Tel Vox Circuit Off/On
8) MOH 10K/ 600 Ohm (VoIP)
9) Tel Input 10K/ 600 Ohm (VoIP)
10) MOH Balanced Output
11) Unmute/ Mute Terminal
12) Microphone Balanced Input
13) Telephone Balanced Input
14) AC Line Fuse
RACK MOUNTING
A) Procure the optional accessory MRK1 Rack Mount Kit. Fig. 4B Optional MRK2 side by side kit.
B) Turn amplifier up side down and remove the four rubber feet by removing the four center pins.
C) Remove three screws on each side of the amplifier holding the amplifier cover.
D) Install the rack kit brackets by using the self-tapping screws provided.
MEM
PAGE 4
3
.
.
2
1
AUXILIARY
5
5
.
4
6
..
7
.
.
8
.
.
9
1
.
.
0
0
4
3
.
.
2
.
1
.
0
MICROPHONE
.
6
..
7
.
.
.
9
.
10
8
4
3
.
.
2
.
1
.
0
TELEPHONE
5
.
6
..
2
7
.
.
.
3
8
.
9
.
10
MDM SERIES RACK MOUNT
0
.
1
1
..
.
.
.
.
5
5
-
+
BASS
MD35 Integrated Amplifier
0
5
.
.
1
1
.
.
4
6
.
.
5
.
TREBLE
..
2
.
3
7
.
.
.
3
.
2
.
8
.
44
.
.
1
9
5
.
+
.
0
MASTER
O
1
.
0
POWER
.
2
2
.
.
3
3
.
44
Specifications are subject to change without notice
15) AUX Input Gain
16) MOH Output Level
17) MIC Vox Sensitivity
18) TEL Vox Sensitivity
Fig. 4B - MRK2 SXS Rack Kit Mounting
MDM SERIES
INSTALLATION AND WIRING
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SPECIFICATIONS ARE SUBJECT TO CHANGE WITHOUT NOTICE
INSTALLATION AND WIRING
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SPECIFICATIONS ARE SUBJECT TO CHANGE WITHOUT NOTICE
INSTALLATION AND WIRING
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INSTALLATION AND WIRING
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INSTALLATION AND WIRING
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INSTALLATION AND WIRING
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INSTALLATION AND WIRING
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INSTALLATION AND WIRING
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INSTALLATION AND WIRING
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INSTALLATION AND WIRING
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INSTALLATION AND WIRING
INSTALLATION AND WIRING
INSTALLATION AND WIRING
PAGE 5
SPECIFICATIONS ARE SUBJECT TO CHANGE WITHOUT NOTICE
INSTALLATION AND WIRING
PAGE 5
SPECIFICATIONS ARE SUBJECT TO CHANGE WITHOUT NOTICE
INSTALLATION AND WIRING
THE SERVICING INSTRUCTIONS ARE FOR USE BY QUALIFIED PERSONNEL ONLY. TO AVOID ELECTRIC
SHOCK DO NOT PERFORM ANY SERVICING OTHER THAN THAT CONTAINED IN THE OPERATING
INSTRUCTIONS UNLESS YOU ARE QUALIFIED TO DO SO. REFER SERVICING TO QUALIFIED SERVICE
PERSONNEL ONLY.
CAUTION: TO REDUCE THE RISK OF FIRE REPLACE ONLY WITH THE
SAME TYPE OF FUSE.
This Troubleshooting Chart is provided to the installer as an aid in locating and correcting possible problems that may arise during installation or after use. This chart should only be used by qualified personnel trained in repair and maintenance of electrical apparatus.
MEM MDM
INTEGRATED AMPLIFIERS
INS
TALLATION
INSTALLATION AND WIRING
INSTALLATION AND WIRING
AND
WIRING
CAUTION !
REMOVAL OF THE AMPLIFIER COVER PRESENTS AN ELECTRICAL SHOCK HAZARD
ALWAYS REMOVE THE POWER CORD FROM THE AC WALL OUTLET
PROBLEM SYMPTOMS PROBABLE CAUSE
AMPLIFIER IS COMPLETELY DEAD.
POWER INDICATOR DOES NOT GLOW.
POWER INDICATOR GLOWS BUT THERE IS NO OUTPUT
FROM THE AMPLIFIER.
TROUBLESHOOTING CHART
1) NO VOLTAGE PRESENT AT AC OUTLET.
2) AC LINE FUSE OPEN.
3) DEFECTIVE OR OPEN POWER CORD.
4) POWER SWITCH INOPERATIVE.
5) POWER TRANSFORMER WINDING OPEN.
6) POWER INDICATOR DEFECTIVE OR DISCONNECTED.
1) INPUT CONTROLS SETTING NOT ADJUSTED PROPERLY.
2) SPEAKER WIRES SHORTED.
3) SPEAKER(S) LINE INTERRUPTED.
4) MICROPHONE OR PROGRAM SOURCE INTERRUPTED.
LOUD HUM OR CRACKLING SOUND FROM THE SPEAKERS.
OUTPUT LEVEL CHANGES CYCLICALLY
SOUND IS INTERMITTENT.
SOUND IS DISTORTED AND OVERDRIVEN.
ACOUSTIC FEEDBACK OR LOUD SQUEAL OCCURS WHEN
AMPLIFIER IS TURNED ON.
AC LINE FUSE REPLACEMENT
Procure a Fuse Type: GMA UL
Turn amplifier power switch to the Off position. Remove power cord from AC outlet. Insert the tip of a cross screwdriver inside the Fuse Holder Cross screw, turn
screw counterclockwise and remove the fuse by pulling outwardly. Replace Fuse
in fuse holder.
1) MICROPHONE INPUTS INCORRECTLY WIRED.
2) OPEN GROUND OR SHIELD IN INPUT CABLES.
3) SPEAKER TERMINALS SHORTED TO CHASSIS GROUND.
1) SPEAKER LINE SHORTED.
2) ONE OR MORE SPEAKER OR LINE TRANSFORMER SHORTED.
3) OUTPUT IMPEDANCE LOAD MISMATCHED WITH AMPLIFIER
OUTPUT IMPEDANCE SETTING (OVERLOAD).
4) IN CONSTANT VOLTAGE SYSTEMS (25-70 V) THE TOTAL LOAD
POWER REQUIREMENT EXCEEDS THE AMPLIFIER POWER RATING (OVERLOAD).
5) EXCESSIVELY HIGH SETTING OF ONE OR MORE VOLUME CONTROLS.
1) MICROPHONE IS LOCATED TOO CLOSE OR IS FACING SPEAKERS.
2) VOLUME CONTROL SETTING TOO HIGH.
3) TONE CONTROLS
SHOULD BE SET IN THE CUT RANGE.
MDM SERIES
SPECIFIC
SPECIFICATIONS ARE SUBJECT TO CHANGE WITHOUT NOTICE
SPECIFICATIONS ARE SUBJECT TO CHANGE WITHOUT NOTICE
A
TIONS
ARE
SUBJECT
T
O
CHANGE
WITHOUT
P
AGE 5
PAGE 5
PAGE 5
N
O
TICE
RETAIN ORIGINAL IN WARRANTY PARTS UNTIL YOU
RECEIVE REPLACEMENTS. PARTS THAT SHOULD BE
RETURNED TO THE FACTORY WILL BE LISTED ON YOUR
PACKING SLIP.
EQUIPMENT RECEIVED IN DAMAGED CONDITION DUE TO
POOR PACKING WILL BE REFUSED AND THE WARRANTY
COVERAGE IS AUTOMATICALLY VOIDED.
MEM MDM
INTEGRATED AMPLIFIERS
CUSTOMER SERVICE
REPLACEMENT PARTS
REPLACEMENT PARTS
Please provide complete information when you request replacement parts from either the Factory or a MEM Authorized
Distributor. Be cer tain to include the Par t Number and
Description as it appears on the parts list, the Model Number of
the unit and if possible the Serial Number and the date of purchase of the unit. Replacement parts inventory is maintained
specifically to repair MEM products. Part sales for other reasons
or applications will be declined.
ORDERING FROM THE FACTORY
Print all information on a purchase order form and mail to:
MIEG CORPORATION
2300 CLEMENTS FERRY ROAD, SUITE 202
CHARLESTON, SC 29492
Be sure to include the following:
- MEM part number
- Part description
- Quantity required
- Model number of the unit
- Serial number of the unit
- Your payment or your authorization for COD shipment for parts
not covered by the Warranty or if your company has a current
account with the factory
For your convenience replacement parts are also available
through MEM Authorized Distributors and Dealers nation wide.
Obtain a location list directly from the Factory or your regional
MEM Representative.
TECHNICAL CONSULTATION
- Need help with your installation ?
- Need help with the operation of the unit ?
- Need help with a repair ?
REPAIR SERVICE
REPAIR SERVICE
Repair service for out of warranty MEM products may be
obtained form your local MEM distributor or any other qualified
repair station.
In warranty repairs must be returned to the Factory.
Prior authorization must be obtained from the Factory.
Products received without authorization will be refused by our
Receiving Department.
IN WARRANTY REPAIR SERVICE
Call or write the Factory to obtain an authorization to return
the product for repairs.
Pack the equipment in the original carton or in a strong carton
with at least THREE INCHES of resilient packing material on all
sides, top and bottom. Seal the carton with reinforced tape and
mark it FRAGILE on at least two sides. Remember, the Carrier
will not accept liability for shipping damages if the unit is improperly packed.
The MEM Limited Warranty provides:
The examination of the returned product must disclose in our
judgement, a manufacturing defect. The warranty does not
extend to any product that has been subject to misuse, neglect,
accident, improper installation or where the serial number of the
product has been removed or defaced.
Ship via insured prepaid via UPS, FedEx, DHL or USPS to:
MIEG CORPORATION
2300 CLEMENTS FERRY ROAD, SUITE 202
CHARLESTON, SC 29492
ATTN.: SERVICE DEPARTMENT
The equipment will be returned freight prepaid after repairs.
Call or write for assistance. You will find our Technical Dept..
eager to help or assist you with any technical problem you may
have encountered except “`Customizing'' for a unique application.
The effectiveness of our consultation service depends on
the accuracy of the information you furnish.
Be sure to tell us:
- The Model and Serial number of the unit
- The date of purchase
- An exact description of the problem
- All you have done in attempting to correct the problem
Call our Customer Service phone number:
1-843-819-8883
Be sure to include the following:
- Your name and address
- Date of purchase and copy of invoice
- A brief description of the problem
- A return address shipping label
OUT OF WARRANTY REPAIR SERVICE
Follow return instructions as per in warranty repair service. Prior
to performing all necessary repairs, you will be advised of the
charges and at that time a written authorization by you will be
required including authorization to return the equipment COD for
the service and shipping charges. This will avoid unnecessary
del
ays in returning the equipment to you.
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