As others have mentioned. In my experience the headrest speakers seemed to be used more for hands free calling than music playing. That is with the stereo set to default or near default settings. The music seems to come more from the front and door speakers.
2006 MX-5 Roadster Coupe - Stormy Blue - SOLD (Australia)
2011 CX-9 GT - light blue (USA)
2019 124 Abarth (USA) - White, Manual, Recaro, Brembo, Veleno Appearance, Visibility, Navigation & Sound, Convenience, Record Monza Exhaust.
Mods: chrome Abarth badges, CarPlay, GENK80A frameless mirror, PTP Turbo Blanket, EC P1-P2 tune, EC V4 intake, EC Intercooler, EC Oil Catch Can, Forge recirculating BOV, alcantara bits, red door piping, led bulb conversion, stubby, MX5Things stuff!