Any Advice Helps Please Help

siah agha · Mar 10, 2026

Hey everyone, I’m looking for advice on installing a system in my 2022 Hellcat Challenger. I have 2 Rockford Fosgate P3D4-15 subs (4-ohm dual voice coil) in a ported box, no amp yet and I’m using an LC2i Pro to integrate with the factory Alpine system. I want my setup to hit extremely hard in the cabin, stay safe for the car’s electrical system, and avoid clipping or distortion. I’m also concerned about proper wiring to 1 ohm, gain tuning, subsonic/low-pass filters, and box orientation in the trunk. Basically, I want a clean, powerful, and reliable install without messing with the car’s electronics messing with my cars ECU wires . Any advice on wiring, tuning, or installer tips to maximize output and protect the system would be greatly appreciated. I’m new to all of this so some pointers to tell the installer would be dope thanks guys
GOING IN THE BACK OF MY CHALLENGER NOT SURE IF THIS HELPS BUT YEAH !

Old_Slapper · Mar 10, 2026

Are you adding any other amps to the vehicle besides the sub amp? For those Fosgate's, you might want to 1200 to 1500 watt mono amp. If you like Fosgate, here are a couple suggestions. The T1500 is really nice, especially if you plan on upgrading subs in the future. Any more power, you will need to juice up your power supply. Either way, when you're adding over 500 watts to a system, you should always do the Big-3 install.

Prime 1200 Watt Mono Amplifier | R2-1200X1 | Rockford Fosgate ®

The R2-1200X1 is a powerful 1200W Class-D subwoofer amplifier with C.L.E.A.N. circuitry, P.O.W.E.R. supply, Punch EQ, & level control for adjustable, deep bass.

rockfordfosgate.com

Power 1,500 Watt Class-bd Constant Power Amp | T1500-1bdCP | Rockford Fosgate ®

The Power T1500-1bdCP is a 1,500-watt mono amplifier featuring Constant Power delivering up to 25% more power across all impedance loads.

rockfordfosgate.com

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Any Advice Helps Please Help

siah agha

CarAudio.com Newbie

Old_Slapper

CarAudio.com VIP

Prime 1200 Watt Mono Amplifier | R2-1200X1 | Rockford Fosgate ®

Power 1,500 Watt Class-bd Constant Power Amp | T1500-1bdCP | Rockford Fosgate ®

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