Fostex FM4 - 4 Channel Portable Mixer has been discontinued, here are some related products you might like:

Designed Specifically for EFP, Boradcast, On Location, TV & Film Apps

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Features Balanced 4ch inputs (Mic/Line) and 2ch main outputs with high quality custom transformers, Hi Shelving EQ and Mid Parametric EQ for ch1/3 and 2/4 and Seamless PAN control and Fader Link function (1-2ch & 3-4ch)

As a 4-channel portable audio mixer designed specifically for EFP, broadcast, on-location TV and film applications, you would expect exceptional audio performance with flexible output options and the FM-4 does not disappoint. Each of the 4 balanced XLR inputs can accept mic or line level inputs and features 12T and 48V Phantom power, an ultra-low noise pre-amp design with high quality custom transformers and switchable Hi Shelving EQ and Mid Sweep EQ. Metering is taken care of by an easy to read, highly visible organic LED display with high resolution metering offering both VU and peak level indication, battery level and selectable stereo and mono modes.

There are multiple output options including sub outputs, a Tape output and 2 x AUX outputs with channel select. The main outputs (x2) and sub outputs (x2) also double as 1-4ch Direct Out (post-fader). In addition, a dedicated monitor return input is available for referencing audio from VTR or Camera feeds.

With their low-noise circuitry, exceptional audio fidelity and unique feature sets the new Fostex Portable Mixers are not only more than suitable for all professional broadcast and film applications, they set a new benchmark for portable on-location mixing devices.


Batter Pack for FM-4
The FM-3 and FM-4 uses an Internal 8 x AA batteries or DC10-24V external powering. It has more than 6 hours operation with alkaline batteries (phantom off).

Carrying Case for FM-4
A carrying case is also available. Model SC-FM4 is manufactured from high-grade materials, is ultra-durable and includes pockets for accessories / batteries etc.

Technical Specifications:

  • External dimensions: 274 (W) x 57 (H) x 180 (D) mm (Including protrusions)
  • Weight: Approximately 1.5kg (not including the internal batteries)
  • Internal batteries: Eight AA batteries (alkaline: 12V, nickel hydride: 9.6V)
  • Power requirement: DC7.2 to 12V
  • External power supply: Optional AC adaptor (AD15C / AD15-4300)

For more information, specifications and downloadable PDF's, visit the Fostex website here at

Fostex FM4 - 4 Channel Portable Mixer
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