My friend's strange amp playing 4 inch horns

I met the talented creator of this amp at Hornfest. I really get a kick out of his gear. He has also built some fine sounding OB's.

Greenvalve Audio breadboard SMPS 826 IT GM70 Tube Amp - YouTube

Sorry buy can you help me. In car racing sports what does s stand for in the HANS device?

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Originally Posted by father

Sorry buy can you help me. In car racing sports what does s stand for in the HANS device?

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Try a Google search, Moron!