Can I use an interconnect adapter with the 1/4″ Power Probe?
Probably not. The Power Probe works on devices that are turned on when you plug a cable into it. This is common with active preamps and pedals that use a 1/4″ connection. If you have a device with an on/off switch, a 1/8″ plug, an XLR connection, or a complex wiring of a 1/4″ plug, then the batteries will probably need to be removed in order to test using the Batt-O-Meter.