Tuner Output
Plug your tuner in here. This output is always on regardless of the position of the mute switch.

DI Output and Ground Lift Button
Attach the line going to the house sound system here. Push the ground lift switch in to eliminate any ground loops.

Effects Loop and Series/Parallel Switch
Attach any outboard effects you might use here. Connect the “send” jack to the “input” jack on your effects unit. Connect the “output” jack on your effects unit to the “return” jack on the Mitre Box. The effects send is picked up immediately after the EQ section and before the master volume. When the series parallel switch is set to parallel, the path through the effects loop runs “along side” the path between the EQ output and the master volume control. When the series parallel switch is set to series, the path between the EQ output and the master volume control is interrupted, forcing the entire signal through whatever is plugged in to the effects loop. More of your signal’s integrity is maintained by running in parallel and using the level control on your effects to determine how much gets mixed in with your main “dry” signal.

Main Output and Ground lift button
This is the main balanced output from the Mitre Box. Attach this to the input of your amplifier.  If your amplifier has a balanced input, it is highly recommended that you use a “Tip/Ring/Sleeve” cable or a microphone cable with an XLR to 1/4” T/R/S adapter on it to interconnect the two. This allows the ground to be lifted in the event of a ground loop hum and offers generally improved performance over unbalanced interconnects. If your amplifier does not have a balanced input, use a standard guitar cable here…preferably a short one.

Line In
This is one of the coolest features on the Mitre Box. Whether you’re in the studio or playing live with in-ear monitors, or just practicing in the hotel room this feature is priceless. This is a true stereo, balanced input designed to accept signals from a wide variety of sources. What ever comes in here is found ONLY at the headphone output. This headphone driver is an audiophile grade design capable of driving any headphones you plug into it to extreme levels. BE CAREFUL. It can get loud.

Right/Mono
When using both the right and left inputs simultaneously, plug the right channel of your balanced or unbalanced source in here. When nothing is plugged into the LEFT channel input, the signal entering here is distributed to BOTH sides of the headphones. Great for play-along records like Aebersold’s where piano is on one side and bass on the other. Plug the piano side in here and play along.

Left/Stereo
When using both the right and left inputs simultaneously, plug the left channel of your source in here. When nothing is plugged into the RIGHT channel input, this input acts like a single-ended stereo input. Plug a 1/4” to 1/8” adapter in here and plug in your iPod or whatever stereo source you like to have it play back in true stereo.

Ground Lift Button
This breaks the circuit between the source ground and the Mitre box ground. This will be used most often in a live setting where there is a ground loop hum between the house system sending you the balanced signal and the Mitre Box.

With the Mitre Box, you are able to send a pre EQ signal to the house, and have them send you back a signal without bass. You can then mix yourself at your position to EQ and balance yourself the way you like to be heard in the mix without affecting the house mix or anyone else’s monitor mix. You can also send a POST EQ signal and still have individual control over your own level in your headphones. 

Power Switch
This turns on main power to the Mitre Box

Power inlet/Fuse holder/Voltage switch
The Mitre Box is fuse protected both externally and internally. It is capable of 110V US voltage operation as well as 220V operation. The fuse and voltage switch are both contained in the “pop-out” drawer in the power inlet.  In addition, there are two internal fuses which protect the unit in the event it is plugged into a 220V system while still set for 110V operation. Because replacement of these fuses requires the unit to be opened, these fuses should only be changed by a qualified technician while the unit is unplugged, and should only be replaced with the proper fuses. 

Click here to see a large photo of the Mitre Box Rear Panel