[E92x7z]

write what system we have and what you want to upgrade for me :


HU BMW profesional CD 73 / Helix DSP 2 + HEC card BT module aptX

front line :
tweeters Focal K2 power TKM + amp JL audio 300 4v2
mids Audison Thesis TH 3 + amp JL audio 300 4v2
underseats Audison APBMW S8-4 + amp JL audio RD 4/400 /bridge mode mono mode/


rear line only OEM speakers to PDC /car have only rear pdc/

central subwoofer in salon Gladen SQX 8" + Zapco ST 4D /2 chanel in bridge/

P.S. i think to change Sub line to Hertz ML 2000.3 and JL RD 1000/1/or analog amp/

https://vimeo.com/manage/510265935/general