ATI Audio Inc Dual 1x3 Low-Noise Analog Distribution Amplifier (XLR Connector) Christie 108-451101-01 The TIP31A is a NPN

The TIP31A is a NPN Bipolar High Power Transistor with 60V collector-emitter voltage and 40W power dissipation

BLACK product from THOMAS & BETTS with the model number 3210Product details

Electro-Voice

and it's access openings feature weather-protecting boots

CABLE product from AMPHENOL RF with the model number 112165Product details

ATI Audio Inc Dual 1x3 Low-Noise Analog Distribution Amplifier (XLR Connector) Christie 108-451101-01 The TIP31A is a NPNAll product and company names are trademarks or registered trademarks of their respective holders. Use of them does not imply any affiliation with or endorsement by them.