Look into Crutchfield

 

This is not that bad of an issue. Pull the 4 ohm speakers, return them or sell them on eBay. Then, replace with 2 ohm compatible ones. The amp in these cars is simply great, so replacing it would be a waste. By the way, I went with the Alpine 6x9s and they are quite amazing.

As a side note, given the opportunity, it will do you well if you put some sound deadening in your doors, rears and spare wheel area.

 

Honestly, to do it right, you might need to bypass the factory amp altogether and run new speaker wires directly from your aftermarket amp to the speakers. It's a bit more work, but it'll give you the cleanest signal and proper impedance matching.

 

Agree, but that would require using money to replace something that works vs using that money to save up for a great upgrade.

 

chain two 4 ohm speakers to get 2 ohm

 

If you’re talking about wiring them in series, in series will double the impedance, not halve it.

The speaker resistance rating (in ohms) can be higher than the amp but not lower in solid state amps. In your case, using 4-ohm speakers in a (non-tube) 2-amp amplifier is not a problem. On the other hand, using 2-ohm speakers with a (non-tube) 4-amp amplifier would overdrive and eventually damage the amplifier. Besides, resistance (ohms) is not continuous across a speaker. Resistance to high frequencies may be as high as 100Ω and low frequencies may be as high as 1Ω.

I don't know what system or setup you have but I'm going to guess that your problem is you didn't realize that the dash speakers are tweeters and the front door speakers are mid-bass speakers. The amplifier has a built-in crossover to direct the high frequencies to the dash speakers and the mid and low frequencies to the door speakers. This is the same setup I have in my Ram. Kenwood makes a package specifically for this setup (KFC-XP6903C), which is what I used when I replaced the door and dash speakers in my Ram (these are 4-ohm speakers, BTW). They sound great. Obviously, you don't have rear doors but the rear door speakers in my Ram were full range. Not sure about the rear deck speakers in the Challenger but I'd guess they're full range also. The speakers I used in my rear doors are Kenwood KFC-X694 (6x9).

 

You can use 4 ohm speakers on a 2ohm system; volume will be slightly less but the signal will be cleaner with less noise.

The speaker sensitivity is what ultimately determines volume. A speaker with a 95db rating will be audibly twice as loud as a speaker with an 85db rating.

 

Well, to bad I did not join this forum MONTHS ago. I have been looking to buy a Challenger for the last 2 years and recently just pulled the trigger. I am trading in a 2020 Ram 1500 and removed my amps, subs, and the LOOPBACK Harness that you needed. If you have not done anything about the sound I am selling this harness as I cannot use it on the Challenger I just bought, as the harness is for non amplified audio systems, and this harness is exactly what you need. Has load resistors in line to make the system think it is only a 2 OHM load.