Radial Engineering Mix 2:1 Two-channel Audio Combiner & Mixer

$ 179.99

Product Description, Features, & Specs:

Radial Engineering Mix 2:1 Two-channel Audio Combiner & Mixer

The MIX 2:1 is a simple yet highly useful mixer that passively sums two audio channels down to one. This enables you to easily sum the stereo outputs of a console, recording interface, or portable playback device down to mono, or to mix any two signals together and balance their relative input levels.



  • Mix two channels to a single mono output
  • Individual level controls can be bypassed when not in use
  • Balanced 1/4″ TRS and XLR inputs
  • Completely passive, no need for power


Combine two balanced mic or line-level signals
The MIX 2:1 makes it easy to sum together any two signals, whether it's two microphones on a single guitar amplifier, or the stereo line outputs of a mixing console. At the inputs of the MIX 2:1, both ¼" TRS and XLR connectors are available, with ground lift switches to eliminate buzz and hum from ground loops and ensure noise-free operation. A trim control is also featured on each input, so if you are connecting two separate mono sources such as the outputs of two mic preamps, they can each be attenuated as needed to match their levels at the output. After both signals are passively summed together, they feed a single XLR output that can be connected to a powered speaker, or the input of a console or recording interface.

Mix 2:1 Applications

Mix the output of two mic preamps to a single track
Combine two tracks to a single input on your audio interface. Use the 180° phase flip to ensure phase coherency between the two inputs.

Summing a stereo aux to a mono input
Engage the level control bypass to sum both channels at unity gain into the mono input of a powered speaker or a recording device.

Summing a stereo source to a single channel on a console
When you’re short on channels, the MIX 2:1 allows you to sum a stereo output down to mono, using only one channel on the console.

Mix two dynamic microphones together into a single preamp
The MIX 2:1 works with mic-level signals as well, which is useful when you're low on available input channels, or want to process two mics using the same signal chain. Ensure phantom power is disengaged when connecting the Mix 2:1 to a microphone preamp.


MIX 2:1 Specifications
The MIX 2:1 uses a completely passive circuit that requires no power to operate and allows you to sum two signals together with minimal coloration or distortion. Either signal can be attenuated to create the desired blend between the two, or the level controls can be bypassed altogether, summing each input equally. The MIX 2:1 automatically compensates for the 6dB in voltage gain when summing two in-phase signals together, so you don’t overload the next device in your signal chain. Ground lift switches are provided to remove buzz and hum from ground loops, and the MIX 2:1 is housed in a rugged steel chassis to handle use in the studio and on the road.


  • Block Diagram
  • Graphs
  • Specifications
  • Audio circuit type: Passive mixer
  • Frequency response: 20Hz to 20kHz
  • Dynamic range: >133dB
  • Total harmonic distortion: >0.005% @ 0dBu
  • Intermodulation Distortion: >0.002% @ 0dBu
  • Phase Deviation: 0° @ 20Hz, 0° @ 1kHz, +2° @10kHz
  • Input Impedance: 8 kΩ
  • Output Impedance: 1 kΩ
  • Common Mode Rejection Ratio: >80dB
  • Noise Floor: -113dBu
  • Maximum Input: >+ 20dBu


  • 180° polarity reverse, Ground lift, Level Control
  • Input Connectors: 1/4", XLR
  • Output Connectors: XLR
  • General
  • Construction: 14-gauge steel chassis and outer shell
  • Size (L x W x D): 5" x 3.25" x 1.85" (12.7 x 8.3 x 4.7cm)
  • Weight: 1.48lb (0.67kg)
  • Shipping size (L x W x D): 6.25" x 4.12" x 3" (15.9 x 10.5 x 7.6cm)
  • Shipping weight: 1.77lb (0.8kg)
  • Power: Passive, no power required
  • Conditions: For use in dry locations only between 5°C and 40°C
  • Warranty: Radial 3-year, transferable
Shipping Information

Shipping Policy

Flipside Music ships items within 2 days of purchase. UPS, FedEx or USPS will be the parcel carrier used to ship your purchase, if you have a preference for another shipping service provider, please contact Ike or Dylan and we will work with you and the company you choose.

International orders may be subject to destination countries sales, VAT or import tax. Please contact your country's duty center, prior to purchase for more information regarding these fees. Flipside Music will not reduce listed price to avoid said duties, taxes, or export/import fees.

Return Policy
Return Policy

New Items:

We honor a 14 day return window on all new items.

If you feel the need to return an item, it must be in the sellable condition, no paint chips, scratches or broken parts. Sellable Condition means that the product(s) is in exactly the same condition as it was when you received it. The item must have all the original packaging, included accessories owner’s manuals and blank warranty card, no sign of wear or abuse.

Used and Vintage Gear:

We honor a 3 day return window on all used and vintage items.

All our used gear is tested for functionality prior to being available for purchase and therefore only carries a 3 day approval period. If you would like to make a return just let us know within the 3 day window.

Damaged or Defective Items:

We visually inspect all items before shipment. If you believe you have received a damaged or defective product, please contact us immediately so we can work through the issue. Guitars, basses, and other equipment returned to us with pick marks, "buckle-rash", or any other damage or evidence of use may be subject to a 20% restocking fee, repair charge or disqualification of return. All items must be returned to us in the same condition they were when shipped to qualify. We reserve the right to refuse any return if we determine the item has been misused, modified or damaged by the purchaser. If the item turns out not to be defective upon inspection, we will have to deduct the cost of shipping from your return credit.

Shipping Charges incurred through the return of an item:

You will be responsible for the shipping charge for the return of your item, and if your item qualifies for Free shipping on its way to you, this shipping charge will also be deducted from your refund. If your item is determined to be defective, we will pay the shipping charge, equivalent to ground service.

SKU: R800 1036 00
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