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Radial SB-7 Ear Muff Passive Headphone Controller

Radial SB-7 Ear Muff Passive Headphone Controller
Radial SB-7 Ear Muff Passive Headphone Controller
Radial SB-7 Ear Muff Passive Headphone Controller
Radial SB-7 Ear Muff Passive Headphone Controller

Radial SB-7 Ear Muff Passive Headphone Controller

Item #110888
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Radial SB-7 Ear Muff Passive Headphone Controller

Stagebug SB-7

When overdubbing in an orchestral setting, the artist is usually listening to a pre-recorded track while playing his or her part of the score. To better hear the pitch and tonality of the instrument, the artist will often remove one side of the headphones by pulling it away from one ear. In doing so, the headphone level is increased to compensate and this in turn, causes sound from the open phone to bleed into the recording microphone, contaminating the mix. This is a common problem when recording violins, flutes and other orchestral instruments.

The Radial StageBug SB-7 Earmuff is a compact device that solves the problem by enabling the artist to turn off one of the phones, thus eliminating the bleed problem altogether.

The design begins with a ¼” stereo TRS input on one side that accepts a standard headphone mix along with a level control. On the output side, a choice of standard ¼” headphone or 3.5mm (1/8″) ear bud outputs provide instant connectivity without the need of a special adaptor. A mono switch enables the artist to sum the left-right stereo playback track to mono so that all instruments are routed to both sides of the headphones. Then, depressing the ‘off’ switch mutes the left ear of the headphones to eliminate bleed while leaving the right side unaffected. One simply adjusts the on-board level control to suit. Because the SB-7 Earmuff is completely passive, no power is needed nor will it introduce any distortion or artefact into the signal path. Plug it in and it is basically ready to go.

Compact, easy to use and affordable, the Radial StageBug SB-7 Earmuff provides a simple, yet elegant solution to a long standing problem.

Stagebug SB-7 Applications

Using the SB-7 with one ear
In the studio, many vocalists and instrumentalists prefer to slip one side of their headphones off their ear to hear the natural sound of their instrument or other performers in the room. The Earmuff provides a mute for this side, preventing bleed in surrounding microphones.

Using the SB-7 as a stereo to mono sum
When only listening to one side of your headphones, you lose half the mix! The Earmuff provides a mono-sum button to make sure everything is heard.

Using the SB-7 as a local volume control
Larger recording studios generally employ a stereo power amplifier to drive serveral sets of headphones at the same time. Using the Earmuff as a simple volume control enables each musician to set the level so that it is set to a comfortable listening level to better match their instrument and playing style.


  • Turns off one side of headphones to stop bleed
  • Artist can hear both playback and instrument
  • Level control enables artist to set ideal volume
  • Completely passive, does not require power
  • Level
    Resistive level control provides the artist with local control to adjust headphone volume level to suit.
  • Mono
    Passively sums the stereo program material to mono and sends the same mix to both sides of the headphones.
  • 1/4" TRS Input
    Accepts a standard studio headphone mix via a standard stereo headphone amplifier.
  • Enclosure
    Made from 14 gauge steel to protect sensitive electronics inside while shielding against magnetic fields.
  • Phones
    Used to connect standard stereo headphones.
  • Left Off
    Used to connect ear buds without requiring an adaptor.
  • 3.5mm Output
    Mutes the left-side (ring) of the headphones to eliminate bleed from the open side from entering the recording microphone.
… [ More ]
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