So I recently installed some Illusion Audio C3CX 3" coaxials in the stock dash speaker locations in my 2018 Dodge Challenger (comes with 3.5" speakers stock). I'm trying to figure out the best high-pass frequency for these little gems...
The manufacturer states this:
- Recommended high pass electronic xover: 250 Hz 12 dB Linkwitz-Riley
Now that seems a little low to me (for a 3" driver)? I have 6x9 midbass speakers in the doors and these C3CX speakers in the dash. I used to run my old coaxials at 450hz, so I started with that for the C3CX speakers as well. However, I always felt that the sound from the dash speakers sounded "treble'y" (for lack of a better word) at higher volumes (aka "harsh" or "thin" or "overwhelming"). These C3CX speakers seem much better (I don't have to dig a huge hole between 2k and 4k anymore to avoid "harshness" at higher volumes like I did with "lesser" speakers), but I still felt that they didn't "mesh" with the 6x9 door midbass speakers as well as they should.
So I tried setting the door <-> dash crossover to 275hz, 24dB slopes and so far I think they sound better like that (seem to blend better with the door midbass speakers) - and they even have a noticeably better sound while playing pink noise while taking individual speaker measurements (much more balanced sound - not so "treble'y").
So - any input on an appropriate crossover frequency for these C3CX speakers? I just worry that anything under 300hz could be problematic for such a small speaker at higher powers, even though the manufacturer *does* recommend 250hz 12dB slopes...
Thoughts?
Thank you!