If all the speakers are amped how would you level match? Is this even needed?
FYI, there are two amp here powering all set, Alpine PDX-4 powering front door card and underseats and PDX-5 powering rest, all L7 speakers, underseats Jehnert, boot sub JL W6 (which is powered by PDX-5 mono).
What will steps for level matching in general?
Note: I am working in stages, next step will be to install Morel Hybrids in the front door cards.
535d LCI, Xenon Adaptive Headlights, ACC 2 (Stop and Go), Lane Departure Warning
Retrofits M5 heated/lumbar/memory and active backrest adjustment seats, rear heated and folding g seats, SAT Shifter, paddles (SA2TB), HUD, Rear blinds, Electric steering column, SA430 Folding and EC Mirrors, High Beam Assist, CIC, COMBOX Telematics, DVB-T TV, JBL MS-8, JL HD900/5 + HD600/4, Morel HO II, Morel Integra XO, JL 12W6v2 and Jehnert in Audio.