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Radial Engineering - MC3 Monitor Controller

Original price $399.99 - Original price $399.99
Original price
$399.99 - $399.99
Current price $399.99

The Radial MC3 monitor controller is a studio tool that enables the engineer to quickly select between reference monitors, sub woofer or headphones and compare how the mix translates via various playback systems. Unique to the MC3 is the ability to quickly sum mono for AM radio compatibility.

And while most monitor switchers are active the MC3 is 100% passive. This means that unlike active switchers that introduce a buffered electronic circuit in between your recording system and monitors, the MC3 delivers straight wire performance. This eliminates coloration and distortion for more accurate monitoring.

The MC3 features an easy access level control that lets you quickly set playback levels on all speakers. Each output is equipped with a top-mount 'set & forget' dial to fine tune outputs for the ideal balance. The sub is augmented with a 180 degree polarity reverse to help deal with room modes that may cause a frequency bump in the mix position.

A separate Dim switch is also adjustable to enable the engineer to temporarily drop the playback level without affecting the mix level settings. To address the ever increasing popularity of ear buds, the Radial MC3 is equipped with a built-in headphone amplifier with stereo 3.5mm (1/8" TRS) output along with two standard 1/4" headphone phone outs to share. The MC3 may be configured for either balanced or unbalanced setups.

The Radial MC3... passive, simple and effective monitor control for the masses!

MC3 - Applications

Using the MC3 with 2 sets of monitors
The most common application is switching between two sets of monitors. This enables the engineer to hear how the mix will translate at various levels using different sized drivers. The mono switch is used to check AM radio compatibility. (see fig 3 above)

Adding a sub to the playback
With more and more home theaters using subs, it is important to audition mixes with and without the added bass. The MC3 lets you switch in a sub as needed. Top mount dials let you adjust the level going to the sub for optimal mix (see fig 4 above)

Using the MC3 as a router
The MC3 can be used as a basic audio router for applications such sending a stereo signal to two rooms. Applications include splitting the signal between the living room and kitchen or two zones in a restaurant. (see fig 5 above)


  • Passive studio monitor switcher with headphone amp
  • Control two sets of monitors and sub woofer
  • Mono sum for AM radio compatibility and phase check
  • Individual 'set & forget' controls to fine tune levels


  • Audio circuit type: Passive stereo signal path with active sub & HP
  • Frequency response: DC ~ 20kHz (+0dB/-1dB)
  • Common mode rejection ratio: -51dB @ 55Hz
  • Dynamic range: 114dB
  • Noise floor: Stereo: -108dBu; Sub: -95dBu; Headphone: -87dBu
  • Maximum input: +14dBu
  • Total harmonic distortion: 0.001% @ 1kHz/0dBu output
  • Inter-modulation distortion: 0.001% @ 1kHz/0dB output
  • Input impedance: 4.4k Ohms Ohms balanced / 2.2k Ohms unbalanced
  • Output impedance: Varies with level adjustment
  • TRS input: Balanced/unbalanced line-level input
  • DIM: Variable attenuation up to -72dB
  • Mute: Mutes all outputs
  • Trim: Level control for DIM, Mon-A, Mon-B and Sub outputs
  • Sub output: Full-range unbalanced output with phase reverse
  • Power: +15VDC/400mA adapter included
  • Construction: 14 gauge steel chassis & outer shell
  • Finish: Durable powder coat
  • Size: 3.3" x 5.0" x 2" (84 x 127 x 48mm)
  • Weight: 1.32lb (600g)
  • Shipping size: 4.75" x 2.5" x 10.75" ( 121 x 64 x 273mm)
  • Shipping weight: 3lb (1.3kg)
  • Conditions: For use in dry locations only between 5°C and 40°C
  • Warranty: Radial 3-year, transferable

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