I would have thought that a 600w power amp driving a 2x100w subwoofer would make enough noise & vibration to no whether its working, from 10 yards away! ?
You should feel the vibration just by putting your hand on the boot floor!
Skoda Enyaq Coupe 85x Sportline Plus Adanced, Heat Pump & 21" Supernova Wheels In Moon White Metallic - Ordered 27th December 2023 - Confirmed 31st January 2024 - Build Week 16 (W/C April 15th) Estimated Delivery 26th May. Build Week moved back to week 23 W/C 3rd June) Build Week moved again to week 32 (W/C 5th August) Brought forward to week 27 (W/C 1st July 24) Advised Week 31 That car us built & in Transit to UK. August 22nd, car arrived at dealership but wrong spec. Collected the car 18/9/2024. Ver