Models

Models | Features | Specifications

DMA2015 - 15 Watt
DMA2030 - 30 Watt
DMA2060 - 60 Watt
DMA2120 - 120 Watt

SERIES DMA COMPACT

ULTRA WIDE POWER BANDWIDTH
UN-MEASURABLE DISTORTION CHARACTERISTICS
HIGH RELIABILITY AND EXCEPTIONAL PERFORMANCE
ADDRESSABLE VOX AND MUTING SYSTEM
INDEPENDENT MOH AND 2ND ZONE OUTPUT
VOX VARIABLE MUTE TIME DELAY FUNCTION
INTELLIGENT INPUT/OUTPUT VERSATILITY
AUTOMATIC LOAD MANAGEMENT SYSTEM
POWER SURGE AND OVERLOAD PROTECTION

   Features

Data Sheets | Applications/Diagrams | Photographs | Manuals

Inputs - Input 1 is set as Microphone Input. Impedance is 250 ohm electronically balanced. This Input may be Transformer balanced by using the optional Transformer Model MT250.
Input 2 is Phone Paging to interface with a Phone System. Input Impedance is 600 ohm, Transformer Balanced. A level control is available on the Front Panel.
Input 3 and 4 can be set at either MIC or AUX Level, (internal Switch/Jumper). Impedance is 250 ohm on MIC and 47 K on AUX.
Phantom Power - Provided on all Inputs set as MIC.
Stereo Summing - Two separate RCA Jacks are provided for Input 3 and 4 (Left and Right). A Stereo signal connected to either Input is buffered and internally summed to Mono.
Input 3 & 4 Attenuators - When the Inputs are set as AUX 1 and AUX 2 the input sensitivity may be varied by a rear panel Variable Attenuator. This feature allows to set the output level of Programs originating from different sources (CD, Satellite Receiver, etc.).
MIX BUSS - This Input/Output may be utilized to parallel two amplifiers or as an input for a Microphone Mixer or other audio source. When used as an Input the Amplifier Level and Equalization Controls have no effect.
Line Out - 600 ohm, 1.5 Volt Line Output.
Remote Volume Control - The INPUT 3/AUX 1 Input Volume may be adjusted from a remote location. Remote Volume Inputs utilize a 10K Pot and are immune to Audio Interference (DC Operation).
Addressable VOX System - The VOX System can be individually selected to operate independently on all 4 Inputs by means of jumpers .
Addressable Muting System - All Inputs may be set to be Muted when the Vox is activated.
Direct Muting/Unmuting System - The MUTE function may be activated by external contacts. MIC 1 Input may be set to normally off and turned-on by shorting the Unmute Terminals.
MUTE Adjustable Delay - A rear panel control adjusts the MUTE Time Delay from 3 Sec. to 60 Sec. Particularly useful to control the length of time that an Input mutes another (for example AUX 1 over AUX 2).
Music on Hold - Output Channel 1 - Channel 1 provides a 1 Volt, 600 ohm Transformer Balanced Output. Internal Jumper selects the source from either AUX 1 or AUX 2. Level Control is provided.
Output Channel 2 - Channel 2 provides a 2 Watt Max., 8 ohm output for Zone 2 Speaker Output. Internal Jumper selects the source from either AUX 1 or AUX 2. Level Control is provided.
Internal Chime Card - An optional Chime Card Model AC1B/DMS is available. When the Direct Muting is activated the Chime is turned-on.
EQ LINK - EQ Link (Preamp. Out) (Power Amp In) jacks are provided for External Equalizer. Activated by the EQ Link Switch.
Tone By-Pass Switch - The Tone by-pass switch defeats the setting of the Treble and Bass Controls. Should be used when an External Equalizer is utilized.
24 VDC Supply Output - A 24 Volt DC, 250 mA regulated Power Supply with dynamic filter is provided for external accessories

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   Specifications

Input 1 MIC Electronically Balanced, Transformer Balanced with MT250 (optional)
Input 2 Telephone Transformer Balanced
Input 3 MIC Electronically Balanced - AUX 1 (Stereo Summing)
Input 4 MIC Electronically Balanced - AUX 2 (Stereo Summing)
Sensitivity & Z:

Input 1 Mic 1 = 1.5 Mv - 250 ohm
Input 2 Tel=100 Mv - 600 ohm - Transformer Balanced
Input 3 Mic 3 = 1.5 Mv - 250 ohm - AUX 1 = 100 Mv - 47K ohm
Input 4 Mic 4 = 1.5 Mv - 250 ohm - AUX 2 = 100 Mv - 47K ohm
Input Attenuator: AUX 1 and AUX 2
Phantom Power: All Microphone Inputs by internal jumper (18 V)
Hum & Noise: Mic-70 db, Aux-75 db 600 ohm Transformer balanced
Telephone Paging Input:

EQ LINK: Preamp. out, Power Amp in with EQ Link Switch
Line Outputs: Line Out 600 ohm - 1.5 V loaded
Inputs/Outputs: MIX BUSS
Music on Hold Output: 600 ohm-1 Volt Transformer Balanced
Zone 2 Output: 2 Watt Max. - 8 ohm with Control
Main Output Impedance: 8 ohm, 25 Volt and 70 Volt line
Controls:

Front Panel: Input 1 Volume, Input 2 Volume, Input 3 Volume,

Input 4 Volume, Bass and Treble
Rear Panel: AUX 1 Attenuator - AUX 2 Attenuator, VOX Sensitivity

- MOH/ZONE 1 Level Control - ZONE 2 Level Control

- VOX Sensitivity - MUTE Delay
Tone Controls: Bass and Treble ± 10 dB at 100 hZ and 10 KHz
Tone By-Pass: On - Off Switch Rear Panel
Remote Volume Control: INPUT 3 - AUX 1 Input Volume
MOH Source Selection: AUX 1 and AUX 2
Zone 2 Source Selection: AUX 1 and AUX 2
VOX BUSS: Available on all Inputs by internal Jumper
MUTE BUSS: Available on all Inputs by internal Jumper
MUTE DELAY: Adjustable from 3 Sec to 60 Sec (rear panel control)
Direct Muting: External Contact Closure
Unmuting: MUTES/UNMUTES MIC 1 only
Power Supply Output: 24 V DC - 250 mA Regulated
Rack Mounting: Optional 19” Rack Kit
Internal Cooling Fan: Thermally Controlled - Models DMA2060, DMA2120
Protection: Power Surge, Overload and Thermal Protection
Power Requirement: 117 Volt, 50-60 hZ
Power Consumption: DMA2015 = AC = 570 VA - DMA2030 = 600 VA
DMA2060 = 670VA - DMA2120 = 850VA Max.
AC Accessory Outlet: 117 v - 500 W Max. Unswitched
Terminations: Screw Terminals, RCA Jacks
Housing Finish: Black
Output Power Indicator: Multi-color LED Signal and Clip
Dimensions: 10.75”W., 11” D., 4” H. with feet (274X280X102 mm)

3.5” H (89 mm). less feet

Net Weight: DMA2015 = 9.8 Lbs (4.5 Kg)- DMA2030 = 11.75 Lbs (5.4 Kg)

DMA2060 = 12.5 Lbs (5.7 Kg)- DMA2120 = 14.25 Lbs (6.5 Kg)

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