Details

Extron MDA 3A (part number 60-440-01) — a one input, three output stereo audio distribution amplifier in a quarter-rack metal enclosure from Extron's MDA Series.

Small, passive-looking, and doing more than it appears to. One stereo source on a 5-pole captive screw connector feeds three stereo outputs, all of which will take balanced or unbalanced wiring. Gain is set by DIP switch rather than a trim pot, which is the sensible choice for a device that gets set once and forgotten: with the switch matched to the output wiring the unit runs at unity, and a deliberate mismatch yields a fixed +6 dB lift or a 6 dB drop, which is often exactly what is needed when a balanced console has to drive an unbalanced amplifier input. Frequency response is flat to ±0.05 dB across the band and channel-to-channel gain error is held to ±0.1 dB.

Key Capabilities

Three stereo outputs, balanced or unbalanced, from one stereo input.
Frequency response of 20 Hz to 20 kHz within ±0.05 dB, THD+N of 0.03% at 1 kHz.
Signal to noise better than 90 dB balanced at maximum output.
Common mode rejection above 75 dB across 20 Hz to 20 kHz.
High input impedance, over 50k ohms unbalanced and over 25k ohms balanced, DC coupled.
Draws only 12 VDC at 0.2 A max from an external Everlast 6 W supply.

Where It Is Used

Lectern and podium audio splits, classroom and meeting room feeds to an amplifier plus a recorder plus assisted listening, projector pole mounts where a local audio tap is needed, and rack corners where a full-width distribution amplifier would be overkill. Four quarter-rack units share a single 1U rack shelf.

Specifications at a Glance

I/O: 1 stereo in, 3 stereo out, all 5-pole 3.5 mm captive screw
Output impedance: 50 ohms unbalanced, 100 ohms balanced
Maximum output: over +24 dBu Hi-Z balanced at 1% THD+N
Enclosure: metal, 1.7" H x 4.3" W x 3.0" D, 0.5 lbs
Warranty: 3 years product, 7 years Everlast power supply

Also referenced as Extron MDA3A, MDA-3A, part number 6044001.

Specifications

Part Number: 60-440-01

Manufacturer: Extron

Model: MDA 3A

Condition: New

Gain: Set by DIP switch. Balanced setting gives 0 dB into balanced wiring and +6 dB into unbalanced; unbalanced setting gives -6 dB into balanced and 0 dB into unbalanced.

Frequency Response: 20 Hz to 20 kHz, ±0.05 dB

THD + Noise: 0.03% @ 1 kHz at nominal level

S/N: >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: 1 stereo, balanced/unbalanced

Audio Input Connector: (1) 3.5 mm captive screw connector, 5 pole

Audio Input Impedance: >50k ohms unbalanced, >25k ohms balanced, DC coupled

Audio Input Nominal Level: +4 dBu (1.23 V), 0 dBu (0.775 V), -10 dBV (316 mV), -20 dBV (100 mV) compatible

Audio Input Maximum Level: +24 dBu (balanced) at 1% THD+N

Audio Output: 3 stereo, balanced/unbalanced

Audio Output Connectors: (3) 3.5 mm captive screw connectors, 5 pole

Audio Output Impedance: 50 ohms unbalanced, 100 ohms balanced

Gain Error: ±0.1 dB channel to channel

Maximum Output Level (Hi-Z): >+24 dBu, balanced at 1% THD+N

Maximum Output Level (600 ohm): >+15 dBm, balanced or unbalanced, at 1% THD+N

Power Supply: External; input 100-240 VAC, 50-60 Hz; output 12 VDC, 0.5 A, 6 watts

Power Input Requirements: 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

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: 0.5 lbs (0.2 kg)

Regulatory Compliance: CE, c-UL, UL, C-tick, FCC Class A, ICES, VCCI. Complies with the appropriate requirements of RoHS and WEEE.

Product Warranty: 3 years parts and labor

Everlast Power Supply Warranty: 7 years parts and labor

Diagram

Resources

Brochure | MDA 3A 60-440-01 | MDA Series

Brochure | MDA 3A 60-440-01 | Everlast Power Supplies

Brochure | MDA 3A 60-440-01 | Alimentatori Everlast

Brochure | MDA 3A 60-440-01 | Everlast 电源

Brochure | MDA 3A 60-440-01 | Everlast-Netzteile

Brochure | MDA 3A 60-440-01 | Fuentes de alimentación Everlast

Brochure | MDA 3A 60-440-01 | MDA 3A - Spec Sheet

Brochure | MDA 3A 60-440-01 | Sources d'alimentation Everlast

Manual | MDA 3A 60-440-01 | Audio Connector Wiring Instruction Card

Manual | MDA 3A 60-440-01 | Cleaning Instruction Card

Manual | MDA 3A 60-440-01 | MDA 3 Series Setup Guide

Manual | MDA 3A 60-440-01 | MDA 3 Series User Guide

Manual | MDA 3A 60-440-01 | MDA 3A User Guide

Manual | MDA 3A 60-440-01 | VersaTools Rack Shelf

Specifications | MDA 3A 60-440-01 | MDA Series

Panel Drawing | MDA 3A 60-440-01 | MDA 3A

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Extron MDA 3A 1x3 Stereo Audio Distribution Amplifier 60-440-01

Name: Extron MDA 3A 1x3 Stereo Audio Distribution Amplifier 60-440-01
Brand: Extron
SKU: EXTRON-MDA3A-6044001
Availability: InStock

Manufacturer: Extron

Type: Distribution Amplifier

Extron MDA 3A Stereo Audio Distribution Amplifier

• One stereo input distributed to three balanced or unbalanced outputs
• DIP switch gain gives unity, or a fixed +6 dB or -6 dB correction
• Frequency response flat within 0.05 dB from 20 Hz to 20 kHz
• THD plus noise of 0.03% at 1 kHz, S/N better than 90 dB balanced
• Channel to channel gain error held to plus or minus 0.1 dB
• High input impedance over 50k ohms unbalanced, DC coupled
• Quarter-rack metal enclosure at 0.5 lbs, drawing 0.2 A max
• 3 year product warranty plus 7 years on the Everlast power supply

Need service or repair? No matter the age, brand, or manufacturer Ampronix can repair it! Free, no charge for initial evaluations!

SKU: EXTRON-MDA3A-6044001