Stellar Solution for Summing Two Channels to Mono Need a simple, reliable way to sum two audio channels to a single mono channel? GearNuts can highly recommend the Radial Mix 2:1, a passive 2-channel mixer that's built to last. Just connect two audio channels (XLR or 1/4"), and the Mix 2:1 sums them to a single mono channel with XLR output. And if you encounter a phase-cancellation issue, simply press the 180 button to reverse the polarity of input 2. Use the front-panel input controls to balance your mix, or engage the level control bypass to sum both inputs equally. Whatever your application is, you can count on high-quality audio performance from the Radial Mix 2:1.Radial Mix 2:1 Passive Mixer Features: Passive 2-channel mixer with XLR and 1/4" inputs Sums 2 channels to a single mono XLR output Use input controls to balance your mix or bypass level controls for