Replaced SPH-4 Headset

I found out the hard way that helicopter and military aviation headsets and helmets with integrated headsets use different impedance electronics than general aviation.

SPH-4 Helmet with HS-1 Speakers and Microphone/Boom

I found an HS-1 on eBay for pretty cheap.  I took apart the SPH-4 and rewired it… which went really well but made me sad because the guy I bought the SPH-4 from took really good care of it!

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