Add $175.00 for FREE shipping
Connector Type
RCA Connectors
Ease of Installation
Beginner (Installs < 10 minutes)
Radio Design Labs
Other Ways to Shop
In Stock
On Sale

Mix 2 Unbalanced Mono Signals with This Simple Mixer
Radio Design labs TX-MX2R Audio Mixer / Distribution Amplifier
Radio Design labs TX-MX2R Audio Mixer / Distribution Amplifier
Radio Design labs TX-MX2R Audio Mixer / Distribution Amplifier
Item# 77956
Price: Normally $101.90 
Hot Deal $66.52
Free shipping on orders over $175 - See Details


  • 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

Essential Info

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.

This item requires a power supply such as the PS-24K for operation.



  • Inputs Level: 2 @ -10 dBV
  • Input Impedance: 10k Ohm bridging
  • Noise: < -75 dB (referenced to -10 dBV)
  • THD+N: < 0.050% (0.010% 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: 0.010% typical
  • Outputs (2): 2 @ 100 Ohms, -10 dBV to drive low or high impedance unbalanced lines
  • Headroom: > 27 dB (24 Vdc supply), > 18 dB (12 Vdc supply)
  • Power: 24 to 33 Vdc @ 10 mA, Ground-referenced
  • 12 Vdc (headroom remains greater than 18 dB)


Related Items

Sign-up for Exclusive Email offers 
How to Order Track Your Package Shipping Returns Contact Us Customer Service Retail Store
Getting Started Learning Center FAQ Dealers Customer Testimonials Affiliate Program
About Us INSTEON Press Awards Employment Guarantees Security & Privacy
Free Catalog Email Newsletter Forum RSS Site Map
Have questions? Call us at 800-762-7846 (Mon-Fri 5am-7pm and Sat 6am-3pm PT) or send us a message
Place your order by 3pm PT for same day shipping
Copyright 1995-2014 SMARTHOME™
Verisign Secure Site PayPal Acceptance Mark