Radial Engineering MIX 2:1 2-Channel Stereo To Mono Mixer, Passive, TRS And XLR Inputs, XLR Output | Full Compass Systems
4 Way Junction Box With Two XLR Connectors and Two Mono Connectors
Balanced Stereo to Mono Summing Cable with Resistors Dual XLR Female to XLR Male | eBay
Amazon.com: CableWholesale 3-Pin XLR Male to 1/4" Mono Male Audio Cable, 24 AWG Microphone Cable, 6 feet : Musical Instruments
I have balanced outputs - XLR or 1/4" TRS Stereo Jack - on my equipment. How do I connect my monitors? – Genelec Support
Amazon.com: tisino 3.5mm to XLR Balanced Cable Adapter, Gold-Plated 1/8 inch Mini Jack Aux to XLR Male Mono Audio Cord for Cell Phone, Laptop, Speaker, Mixer - 1ft : Musical Instruments
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AV-advance Mini XLR to mono Jack cable (mini female - 6.3 mm male)