Is there a way to bypass the "low pass cross" on the front speakers?
Not that i know of ... that would be a question for the ford designers of the sync head unit. The signal is crossed before it ever reaches the factory amps. JL audio does have a LOC that can sum signals together, and originally i had one in my car. It gave me a full signal up front, but over time the bass signal started having major problems, so now i run two separate AudioControl LC2i, one for the front channel, and one for the subs.
2012 GT CS Ingot Silver Vert, Edelbrock E-force supercharger with CAI and 3.5 Pulley, Tremec T-56 Mag, Accufab 84.5, Centerforce DF, Billet Yoke aluminum driveshaft, FRPP 3.73 Rear, MRT Performance H-pipe, Bassani axle backs, JL Audio sound, Edelbrock strut tower brace, JPC adjustable UCA, UMI adjustable panhard bar, KW V3 coilovers, Steeda heavy duty front mounts, Steeda rear LCA's, 20" Steeda Spyders with Michelin Pilot Super Sports, Steeda Big Brake Kit ....... it just keeps going.