MDA 3A

Three Output Stereo Audio Distribution Amplifier
Key Features
  • Accepts and distributes balanced or unbalanced line level stereo audio
  • Audio output gain dip switch to maintain unity gain
  • Rack, under-desk, and projector-mountable, four per rack
The Extron MDA 3A
Model Version Description Part #
MDA 3A 1x3 Stereo Audio 60-440-01

The Extron MDA 3A is a compact, one input, three output stereo audio distribution amplifier. It accepts balanced and unbalanced audio only on one captive screw connector and outputs the amplified signal on three captive screw connectors up to 150 feet (45 meters).

The MDA 3A is rack or under-desk mountable and comes with an external power supply. Its small size makes it the ideal solution for easy integration into both new and existing AV systems including boardrooms, training facilities, home theater, command and control centers, and rental and staging environments.

Features

OPTIONAL ACCESSORIES
  RSU 129 Universal Rack Shelf Kit for 9.5" Deep Products
  RSB 129 Basic Rack Shelf for 9.5" Deep Products
  MBU 123 Low-Profile Mount Kit for 1/8, 1/4, and 1/2 Rack Width Products
  RSF 123 Rack Shelf Kit for 3.5" Deep Products
  PMK 100 Pole Mount Kit for One 1/4 Rack Width Product
  ZipClip 50 Mounting Kit for PS 1205 C Power Supply
  ZipClip 400 Mounting Kit for 1/8, 1/4, and 1/2 Rack Width Products

Specifications

MDA Series
Video
   Gain Unity
   Bandwidth 400 MHz (-3 dB)
Video input
   Number/signal type 
      MDA 3V/3AV, MDA 5V 1 composite video
      MDA 3V Dual 2 composite video
   Connectors 
      MDA 3V/3AV, MDA 5V 1 female BNC
      MDA 3V Dual 2 female BNC
   Nominal level 1 Vp-p
   Minimum/maximum levels 0.4 V to 2.0 Vp-p with no offset
   Impedance 75 ohms
   Return loss <-27 dB @ 5 MHz
   DC offset (max. allowable) 5.0 V
   Input coupling AC
Video output
   Number/signal type 
      MDA 3V/3AV 3 buffered composite video
      MDA 3V Dual 2 x 3 buffered composite video
      MDA 5V 6 composite video: 5 buffered for distribution, 1 passive loop-through
   Connectors 
      MDA 3V/3AV 3 female BNC
      MDA 3V Dual 6 female BNC
      MDA 5V 6 female BNC
   Nominal level 1 Vp-p
   Minimum/maximum levels 0.4 V to 2.0 Vp-p, follows input
   Impedance 75 ohms
   Return loss <-30 dB @ 5 MHz
   DC offset ±50 mV with input at 0 offset
Sync
   Standards NTSC 3.58, NTSC 4.43, PAL, SECAM
Audio — MDA 3AV, MDA 3A/3A RCA, MDA 5A RCA
   Gain 
   Frequency response 20 Hz to 20 kHz, ±0.05 dB
   THD + Noise 0.03% @ 1 kHz at nominal level
   S/N 
      MDA 3A/5A RCA >90 dB, unbalanced, at maximum output
      All other models w/audio >90 dB, balanced at maximum output
   Stereo channel separation >80 dB @ 1 kHz; >60 dB @ 20 kHz
   CMRR >75 dB @ 20 Hz to 20 kHz
Audio input — MDA 3AV, MDA 3A/3A RCA, MDA 5A RCA
   Number/signal type 
      MDA 3A RCA, MDA 5A RCA 1 stereo unbalanced
      MDA 3AV, MDA 3A 1 stereo balanced/unbalanced
   Connectors 
      MDA 3A RCA, MDA 5A RCA 2 RCA connectors
      MDA 3AV, MDA 3A (1) 3.5 mm captive screw connector, 5 pole
   Impedance 
      MDA 3A RCA, MDA 5A RCA >10k ohms unbalanced, DC coupled
      MDA 3AV, MDA 3A >50k ohms unbalanced, >25k ohms balanced, DC coupled
   Nominal level +4 dBu (1.23V), 0 dBu (0.775 V), -10 dBV (316 mV), -20 dBV (100 mV) compatible
   Maximum level 
      MDA 3A/5A RCA +17 dBu (unbalanced) at 1%THD+N
      All other models w/audio +24 dBu (balanced) at 1%THD+N
    NOTE     0 dBu = 0.775 Vrms, 0 dBV = 1 Vrms, 0 dBV ≈ 2 dBu
Audio output — MDA 3AV, MDA 3A/3A RCA, MDA 5A RCA
   Number/signal type 
      MDA 5A RCA 5 stereo, unbalanced
      MDA 3A RCA 3 stereo, unbalanced
      MDA 3AV, MDA 3A 3 stereo, balanced/unbalanced
   Connectors 
      MDA 5A RCA 10 RCA connectors
      MDA 3A RCA 6 RCA connectors
      MDA 3AV, MDA 3A (3) 3.5 mm captive screw connectors, 5 pole
   Impedance 
      MDA 3A RCA, MDA 5A RCA 50 ohms unbalanced
      MDA 3AV, MDA 3A 50 ohms unbalanced, 100 ohms balanced
   Gain error ±0.1 dB channel to channel
   Maximum level (Hi-Z) 
      MDA 3A/5A RCA +15 dBV, unbalanced, at 1%THD+N
      All other models w/audio >+24 dBu, balanced at 1%THD+N
   Maximum level (600 ohm) 
      MDA 3A/5A RCA >+14 dBm, unbalanced, at 1%THD+N
      All other models w/audio >+15 dBm, balanced or unbalanced, at 1%THD+N
General
   Power supply External
Input: 100-240 VAC, 50-60 Hz
Output: 12 VDC, 0.5A, 6 watts
   Power input requirements 
      MDA 3V, MDA 5V 12 VDC, 0.1 A (max.)
      MDA 3AV 12 VDC, 0.3 A (max.)
      All other models 12 VDC, 0.2 A (max.)
   Temperature/humidity Storage: -40 to +158 °F (-40 to +70 °C) / 10% to 90%, noncondensing
Operating: +32 to +122 °F (0 to +50 °C) / 10% to 90%, noncondensing
   Cooling Convection, no vents
   Mounting 
      Rack mount Yes, with optional 1U rack shelf
      Furniture mount Yes, with optional mini under-desk mount kit
      Pole mount Yes, with optional projector pole mount kit
   Enclosure type Metal
   Enclosure dimensions 1.7" H x 4.3" W x 3.0" D (1U high, quarter rack wide)
(4.2 cm H x 11.0 cm W x 7.6 cm D)
(Depth excludes connectors and knobs.)
   Product weight 
      MDA 3V 0.4 lbs (0.2 kg)
      MDA 3V Dual 0.7 lbs (0.3 kg)
      MDA 3AV 0.6 lbs (0.3 kg)
      MDA 5V 0.5 lbs (0.2 kg)
      MDA 3A 0.5 lbs (0.2 kg)
      MDA 3A/5A RCA 0.4 lbs (0.2 kg)
   Vibration ISTA 1A in carton (International Safe Transit Association)
   Regulatory compliance CE, c-UL UL, CE, C-tick, FCC Class A, ICES, VCCI,
Complies with the appropriate requirements of RoHS, WEEE
   Product warranty 3 years parts and labor
   Everlast power supply warranty 7 years parts and labor
    NOTE     All nominal levels are at ±10%.
    NOTE     Specifications are subject to change without notice.
(4475-101518-D17)
Shipping Dimensions and Weights
    Part # Height Width Depth Weight
    60-440-01 2.44" (6.2 cm) 7.13" (18.1 cm) 9.5" (24.1 cm) 1.71 lbs (0.78 kg)

Diagram

Application Diagram

Panel Drawing

Panel Drawing
© 2019 Extron. Specifications are subject to change without notice.