RDL FP-UBC2 Unbalanced-to-Balanced Audio Converter.

Pair of Gaines Audio Model 642 Balanced Line Interfaces

Passive DI Box Single Channel Balanced Audio Signal Converter XLR TRS Interface

IFA-5 Benchmark Media Systems, 4 channel Unbalanced to Balanced audio converter

Rolls MB15b ProMatch Balanced/Unbalanced Converter 3.5mm/RCA/XLR

SM PRO AUDIO TRANZ-R STEREO RECEIVER WITH LINE LEVEL BALANCED & UNBALANCED OUT

Pyle PDC21 Direct Box Audio Interface Ground Balanced In/Out

Kramer VA-256 digital audio delay unit for balanced stereo audio 4dBu