Four wire boxes - FW4010, FW2010, FW6000, FW6000XL, B-FW1 beltpack, Boombox


A four input, four output four wire box with two IFBs and extra features.

FW4010
  • Switchable open talkback on output four.
  • Four wires 1 & 2 operate as IFBs without loss of four wire inputs.
  • Talk keys momentary (down) and latching (up).
  • Rear panel switch to defeat key latching.

    FW4010
  • LED talk key indicators.
  • LED VOX indicators.
  • Auto speaker off when headphone jack inserted.

    FW4010 rear

    • Earth lift switch.
    • Rear panel speaker off switch.
    • Selectable 12 volt phantom power on mic XLR.
    • Rear panel multiturn mic output level trimmer
    • Rear panel speaker on/off switch.
    • 2.5 watt RMS power amplifier.


    This is our new FW2010, a simple but high quality 2 input, 2 output four wire box with IFBs.

    FW2000
    • Switchable open talkback on output two.
    • Both four wires operate as IFBs without loss of four wire inputs.
    • Talk keys momentary (down) and latching (up).
    • Rear panel switch to defeat key latching.
    • LED talk key indicators.
    • LED VOX indicators.
    • Auto speaker off when headphone jack inserted.
    FW2000 rear

  • Earth lift switch.
  • Rear panel speaker off switch.
  • Selectable 12 volt phantom power on mic XLR.
  • Rear panel multiturn mic output level trimmer
  • Rear panel speaker on/off switch.
  • 2.5 watt RMS power amplifier.



    We have two versions of our 1RU four wires boxes. Please see further down for details of the FW6000XL.
    The FW6000 is designed for the user requiring six four wires and more basic IFB facilities.

    FW6000
    • Six inputs, six outputs.
    • Keys up to latch, down for momentary.
    • Rear panel key latch disable.
    • Audio present LEDS on each channel.
    • Talk LED indication.
    • Separate mic amps with adjustable gain for headset and stalk mic.
    • Speaker / stalkmic / headset select switching.
    • Four wire inputs may be switched to operate as IFB interrupt feeds. DIP switches to enable IFB monitoring.
    • Hot line level microphone output.
    • Aux d9 for footswitch operation of all channels
    • Headphone socket suitable for both A and B gauge jacks.
    • Transformers on all inputs and outputs.
    FW6000

    Dimensions: 1RU case 300mm deep


    Please note that this unit is now supplied with front and rear panels in blue sparkle finish.

    The FW6000XL has all the facilities of the FW6000 but has an additional four IFB interrupt inputs which may be delegated to any or all of the unit's four wire outputs.


    Each channel's volume control may be selected via front panel push buttons to listen to either the channel four wire input or Interrupt input.

    Here is a view of the rear showing the IFB delegation.



    1RU case 300mm deep

  • The B-FW1 is an analogue single channel four wire beltpack which includes a built in speaker.

    B-DF4 front B-DF4 front













    The talk buttons can be programmed to operate push to talk, latching or 'smart' (tap to latch, push to talk).
    Programming the B-FW1 is simple using the OLED display which also shows line input and output levels during normal operation.

    The following features are programmable:

    • Microphone amplifier gain range 30dB to 60dB
    • Phantom power on/off
    • Highpass filter some/lots
    • Mic automatic gain control none/some/lots
    • Line input gain 6dB, 12dB or 18dB of gain
    • Headphone limiter some/lots
    • Sidetone on/off/full level/-6dB/-12dB
    • Loudspeaker on/off
    • Talk switch mode momentary/latching/smart

    Power requirements are a PP3 size 9V battery (alkaline recommended) or a 9-16 volt external DC supply.


    The Boombox is a three input one output four wire box for use with a headset and with an overall volume control.

    FW4010 FW4010
    There is a GPI input for footswitch controlled talk. All three inputs and the single output are on one RJ45 connection.
    Each input may be selected to left/right/both earpieces. The unit can be supplied to work on 12Vdc or 110-240Vac mains.