Mic Splitters, Patchbays and the Search for Clean Gain

What is the cleanest way to connect several microphones, preamps and audio interfaces without constantly crawling behind the rack?

AP starts with what sounds like a simple question about expanding the line-level inputs on his Audient iD44. That sends the team down a glorious rabbit hole involving passive switchers, mic splitters, USB converters, matrix routers, the Heritage Audio Synth Buddy, ESI interfaces, Broadcast Tools, Source-Nexus and the Passport VO.

Eventually, one decidedly old-school solution keeps winning the argument: the humble patchbay.

The team discusses quarter-inch, Bantam and TT patchbays, normalled and half-normalled connections, passive mic splitting, phantom power, transformer isolation, corrosion, loose connectors and why adding another preamp stage may not be the sonic disaster people imagine.

Along the way, George mourns the disappearance of simple line-level audio interfaces, Robert explains how passive splitters survive real concert recording jobs, and Robbo demonstrates his remarkable ability to make a straightforward signal path impressively complicated.

In this episode:

• Switching several microphones and preamps into one interface • Passive line-level switchers versus audio interfaces • Why a patchbay may be the simplest solution • Normalled, half-normalled and open patchbay configurations • Quarter-inch patchbays versus TT and Bantam systems • Passive microphone splitting and phantom power • Transformer isolation and troublesome ground loops • Keeping the signal path clean without overengineering it

The Pro Audio Suite is hosted by George Whittam, Robert Marshall, Andrew Peters and Darren "Robbo" Robertson.

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