Precision Audio and AV Interface Products

Radio Design Labs

TX-MX2R Audio Mixer / Distribution Amplifier

  • Mix 2 unbalanced mono signals
  • Combine stereo into mono
  • Gain trim for each input
  • Two active isolated outputs from the input signal (s)
  • Isolation between inputs
  • High-Quality unbalanced audio
  • Overview
  • Specifications
  • Related Products
  • Accessories
  • Downloads
  • How to Buy
  • Product Series
  • Dimensions

The TX-MX2R is the ideal choice in installations requiring the active, isolated mixing of two unbalanced line-level audio sources to feed either one or two unbalanced destinations.

The input circuits are high-impedance, line-level (-10 dBV) and are each isolated from each other. Therefore the modules may be used to bridge an unbalanced stereo source without affecting the stereo separation. Each output from the TX-MX2R is a mono mix of the stereo signal. Normally, the gain trimmers are set to unity gain. If either channel is low, the gain of that channel may be adjusted up to 6 dB.

The TX-MX2R may also be used to mix two separate sources into a single output. The mixing circuit in the module is an active summing amplifier.

The output driver provides two separate, identical output signals from the input signal or signals. This output distribution amplifier therefore allows the TX-MX2R to be used as a two-output audio distribution amplifier. If it is desired to distribute a single source to two destinations, one of the inputs may be left unused without any loss of performance.

Inputs (2):
-10 dBV
Input Impedance:
10 kΩ
Noise:
< -75 dB (referenced to -10 dBV)
THD+N:
< 0.05% (0.01% typical)
Frequency Response:
25 Hz to 45 kHz (± 0.5 dB)
15 Hz to 70 kHz (± 1 dB)
Gain (per channel):
Unity to +6 dB nominal (adjustable)
IMD:
0.01% typical
Outputs (2):
100 Ω unbalanced, -10 dBV to drive low or high impedance unbalanced lines
Headroom:
> 27 dB (24 Vdc supply)
> 18 dB (12 Vdc supply)
Ambient Operating Environment:
0° C to 55° C
Power Requirement:
GROUND-REFERENCED, 12 to 33 Vdc @ 10 mA
Package Type:
Cardboard Box
Package Dimensions:
2 x 2 x 4 in.
Shipping Weight:
0.26 lbs.
WEEE weight:
0.205 lbs.
Tariff code:
8543.70.9860

Documents:
Format
PDF
CAD Files:
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High Res Images:
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Declaration of Conformity:
Format
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TX SERIES

TX Series modules are application-specific modules for the A/V and related industries. Many TX modules offer galvanic transformer isolation. Module functions include signal detection, switching, amplification, format conversion, line driving, mixing, distribution, twisted-pair sending/receiving and more. Each TX is a compact module engineered to provide higher performance and longer life than other industry products. TX modules are solid encapsulated hybrid circuits in durable industrial black plastic/steel or aluminum enclosures with clear bold white lettering for the jacks, terminal block connections, trimming controls and switches.

TX modules are constructed in two widths and heights. All TXs are the same length, have the same mounting hole configuration, and are compatible with all TX series mounting options. A complete range of mounting options is available for systems utilizing multiple TX modules. A single TX module may be mounted right where its function is needed, and are widely used in system designs with OEM or other RDL products. TX SERIES modules are designed and manufactured in the U.S.A.

TX-MX2R TX-MX2R