In case anyone was wondering, a 12 inch JBL subwoofer does fit in the back of the Spark! : r/chevyspark
Bass Box Audio Car - Hoy les dejamos este proceso de instalación de un cajón doble de 15" SoundStream a medida en un Chevrolet Spark, desafío aceptado! Se instalo: + 2 Subwoofer
Chevrolet Spark 2018 STEREO UPGRADE FULL 3D PRINT INSTALL ADSP6 + AE650C + STEG SQ650 + STEG SQS12 - YouTube
PowerBass OE Series Direct Replacement Speakers With Front Tweeters Compatible With Chevy Spark 16-19 - Walmart.com
Chevy spark EV Aftermarket speaker Upgrade - YouTube
subwoofer woes. - Audio, Navigation, MyLink and Navigations - Chevy Spark Forum
3D PRINTED Chevrolet Spark 2018 Speaker Adapter (INT) - YouTube
2015 Chevrolet Spark Build | DIYMobileAudio.com Car Stereo Forum
CARSound - Chevrolet Spark Subwoofer/Bas
2019 Spark LS speaker upgrade? - Audio, Navigation, MyLink and Navigations - Chevy Spark Forum
For 2013-2016 Chevrolet Spark Speaker Connector 85765MD 2014 2015 Speaker Box | eBay