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MDA-26T Distribution Amplifier


The Oxmoor line of distribution amplifiers are high performance audio buffer/distribution amplifiers well suited for professional applications. The MDA-16T enables a single input to be distributed among six transformer-isolated output channels. The MDA-26T adds flexibility by providing user-assignable internal jumpers to configure the unit for a single stereo input or two mono inputs.

All of our Distribution Amplifiers feature front panel input gain trim adjustment of ±15 dB to compensate for varying input signal levels. Outputs also feature independently adjustable gain over a ±15 dB range and can deliver a maximum level of ±24 dBm, 20 Hz to 20 kHz, with greater than 80 dB of isolation between channels to guarantee discrete channels.

Input circuits found in the Oxmoor DA product line can accommodate up to +24 dBu signal levels, and incorporate RF suppression to preserve signal integrity in the presence of radio-frequency interference. Each output driver has an internal jumper that allows configuring for balanced or unbalanced operation.

The MDA-16T and MDA-26T are capable of matching disparate signal levels, allowing hi-fi and professional line-level signals to be freely inter-mixed without additional interfaces. Their impressive audio specifications, along with their compact and rugged design make them ideally suited to recording and broadcast applications.

The MDA-26T features electronically balanced inputs and balanced transformer-isolated outputs, with XLR connectors. One or both inputs may be assigned to any (or all) of the outputs. It requires one rack space.

MDA-26T Part Number: 2500024

Conformité EuropéenneUnderwriters Laboratories

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Product specifications

Frequency Response 20 Hz to 20 kHz +0, -0.3 dB
-3 dB Points, Ref. 1 kHz 4 Hz to 60 kHz (+4 dBm Output)
Hum and Noise Ref. +4 dBm Output @ Unity Gain -94 dB (20 Hz to 20 kHz BW, Unweighted)
Distortion Ref. +4 dBm Output @ Unity Gain
THD + Noise 0.0016% (20 Hz to 20 kHz BW)
SMPTE IMD 0.0021% (60 Hz + 7 kHz, Mixed 4:1)
Transient Intermodulation 0.0031% (3.15 kHz SQ + 15 kHz Probe, 30 kHz BW)
Crosstalk Channel to Channel (MDA-26) -80 dB (20 Hz to 20 kHz, Input Terminated w/600 Ohms, Adjacent Channel Driven to +4 dBm)
Audio Input Type Electronically Balanced (RF Suppressed)
Connector Female XLR
Pin Out Pin 1 Shield (Chassis), Pin 2 +, Pin 3 –
Input Impedance 80 k Ohms
Nominal Input Level +4 dBu
Maximum Input Level +24 dBu
Trim Pot Gain Range ±15 dB (Ref. 0 dBu Output)
Audio Output Type Balanced Transformer-isolated
Connector Male XLR
Pin Out Pin 1 Shield (Chassis), Pin 2 +, Pin 3 –
Source Impedance 150 Ohms (75 Ohms/Side)
Recommended Load Impedance 600 Ohms or Greater
Nominal Output Level +4 dBu (+4 dBu Input)
Maximum Output Level (Ref. 1 kHz @ Rated THD)
Terminated w/600 Ohms +24 dBm (All Outputs Driven Simultaneously)
Unterminated +26 dBu
Trim Pot Gain Range ±15 dB (Ref. 0 dBu Output)
Safety Listing UL 1419
Mains Power Power Requirements 100 to 125 VAC or 200 to 230 VAC 50/60 Hz; 13 Watts Maximum
Mechanical Overall Dimensions
44 H x 482 W x 183 D mm
(1.72 H x 19 W x 7.18 D in)
Finish Textured Black Paint
Shipping: 3.8 Kg (8.5 lb)
Net: 3.1 Kg (6.9 lb)

Specifications subject to change without notice. The term MDA is a trademark of the Oxmoor Corporation.

Architect and engineer's specifications

Two input, six output audio buffer/distribution amplifier. Either or both inputs internally jumper assignable to any/all outputs allowing stereo or mono distribution. Frequency response: +0, 0.3 dB, 20 Hz 20 kHz. Hum and noise (ref. +4 dBm output at unity gain): 85 dB, unweighted. Distortion (ref. +4 dBm output at unity gain): THD, 80 dB/0.01%, 20 Hz 20 kHz; IMD, 80 dB/0.01%. Audio input: electronically balanced, 3 pin XLR type. Input impedance: 80 K ohms. Maximum input level: +24 dBu. Audio outputs: transformer isolated, 3 pin XLR type, balanced. Source impedance: 150 ohms. Maximum output level: +24 dBm with 600 ohm termination; +26 dBu unterminated. Individual, front panel input and output gain trims provide +/ 15 dB adjustment. Mounting: rack mountable, one EIA rack space (44.45 mm; 1.75 in.).

Acceptable: Oxmoor MDA-26T

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