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General
Remote Referencing
You can approach balanced performance with unbalanced sources by utilizing the remote
reference feature of the V22. Connect a balanced cable to the V22 just as you would if you were
running a balanced line. At the other end, connect Pin 3 and Pin 1 together, (or connect ring to
sleeve if you are using a PHONE plug cable), and plug this modified end into your unbalanced
piece of equipment. This connection enables the V22's input to look down the cable directly
at the output jack of the unbalanced equipment. Any hum voltage generated across the cable's
impedance will be attenuated by the common mode rejection of the V22.
Driving Multiple V22's
In large installations it is often desirable to operate many amplifiers in tandem. Since each chan-
nel's XLR input is internally paralleled with its phone input, you may use the remaining input
jack as an output to the next amplifier. Obviously you will need both XLR to XLR and PHONE to
PHONE patch cords if you are going to tandem more than two amplifiers.
Ground Switch
Switching the ground switch on the rear panel will disconnect chassis ground from circuit
ground. Safety (earth) ground is still connected to the chassis. We do not recommend lifting the
ground strap unless you experience problems with ground loop hum in multiple amplifier setups
where lifting the ground straps of all but one amplifier cures the hum problem
Modes
The V22 can be configured for dual-MONO, STEREO, or BRIDGED MONO operation via this rear
panel MODE switch. The following is a description of each mode:
2
NOTE: These patch cords MUST be balanced whether the input signal is balanced
or unbalanced!
CAUTION: Sometimes hum problems are an indication of improper AC wiring some-
where else in your system. Don't just doctor the symptom by lifting grounds. Fix the
cause by making sure that the proper electrical wiring safety regulations have been
adhered to.
Mono Mode
• Channel A & B inputs are paralleled.
• Each gain control adjusts the signal level for its respective channel
• Output signals are of equal phase.
• Two loads are driven.
• Loads are connected to the Speakon connector on each channel.
Stereo Mode
• Channel A and B inputs are separate.
• Two independent amplifiers, Amp A and Amp B.
• Two loads are driven.
• Loads are connected to the Speakon connector on each channel.
Bridge Mode
• Channel A and B inputs are paralleled. GAIN B has no effect.
• Output signals are equal in amplitude but opposite in phase.
• One load is driven.
• The load is connected to pin 1+ and 2+ on the Speakon connector on channel A.
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