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
| 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 | |||
| MDA 3A |  | ||
| All other models |  | ||
| 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 | ||
| |||
| 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.) | ||
| Ambient 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 | ||
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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
- Input: One 3.5 mm captive screw connector
- Outputs: Three 3.5 mm captive screw connectors
- 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
- External Extron Everlast™ power supply included, replacement part #70-1175-01 — Provides worldwide power compatibility with high‑demonstrated reliability and low power consumption
- Extron Everlast Power Supply is covered by a 7‑year parts and labor warranty