The XLRP3 lets you take electrical measurements of an audio signal using an analyzer with an XLR input.
 
Includes:
XLR end to Fluke meter probe cable
Fluke alligator ends
Fluke backprobes
Fluke velcro wrap
Nickel-plated XLR/RCA adapter
XLR attenuator
Bag
 
Works with any Real-Time Analyzer with an XLR input!
Audio Control
Phonic PAA2, PAA3, or PAA6
NTI Acoustilyzer, Minilyzer, or XL2