I never did... since I went the Legatia route. However... I did put the Legatia speakers in my wife's Lexus and have not replaced mine just yet. I have the FaialPRO 4" in the dash right now, and they sound pretty good ... better than factory. I have a miniDSP with an amp to connect... just haven't had a chance to do it yet. I'll likely go back to the Legatia speakers.
I've followed your posts pertaining to the HK audio system over a number of threads here and I feel you have a good grasp on the deficiencies of the HK RAM design. I hope you don't mind if I pass a few things by you as well as everyone else.
I'm a long-time audiophile and have built many home and vehicle sound systems, so I have a lot of experience in this area and a good ear. I just traded in a 2019 Subaru Ascent SUV for a 2021 RAM 1500 Limited. I was horrified to see that my Limited came with the HK sound system. This is because it's basically the same system that's used on the Ascent Premium models and sounds just as bad to my ears. Over on the Ascent forum, it's a huge topic of discussion and it's almost universally despised. When I got the RAM and started playing with its HK audio, it was Deja vu all over again. It sounds virtually identical to the Ascent's HK sound system.
However, the flaw, as I perceive it, is not only that the bass is too boomy (I could almost live with that), but rather that the mid-bass is way too weak, the upper mid-range is too pronounced, and the higher treble frequencies are incredibly harsh. Snare drums sound like they're being hit on paper skins, and guitar riffs and horns are almost painful. Overall, to my ears, it sounds like the equalization is incredibly skewed. At first, I thought it was just me, maybe my hearing is not as good as it used to be and perhaps, I was losing some mid-frequencies, but everyone I demo the sound to feels the same way. On the Ascent forum, this was the primary complaint, the boomy bass was a secondary topic. Yet on the RAM forum, the boomy bass is the primary complaint and I'm not reading about the issues with the weak mid-bass and harsh treble, which I find strange because it's so prominent. Who cares about only the bass if the damn thing sounds so bad across the more critical frequencies where most of the music is?
Additionally, no one here seems to be complaining about the astounding lack of a multi-band equalizer which is commonly found even on low to mid-level vehicle audio systems. With the equalization so far out of whack, a decent multi-band equalizer could go a long way to help correct things, but with only 3 very wide bands, this is simply not possible. I can't boost the mid-bass and lower the deeper bass at the same time, nor can I correct for the harsh treble without killing the other critical upper frequencies that are needed, and I can't correct for the tinny upper mid-range without ruining the vocals. The system is a nightmare. I have no idea how anyone at HK or RAM could think this was in any way acceptable.
I'm assuming that the amplifier's power is fine as it sounds clean enough even at high volumes with no undue clipping, and also that the OEM speakers are adequate enough to produce decent enough fidelity. Therefore, this could all possibly be resolved via a proper software upgrade. HK could remove whatever bizarre equalization they've hard programmed into the DSP and/or replace the ridiculously inadequate 3 band tone controls with a proper 10-band equalizer so at least we could correct for it ourselves for our own individual hearing and tastes.
So, without a software fix, I don't know where to begin fixing this thing via only the hardware. I've read about what some have done here, but I'm reluctant to duplicate that because it involves primarily the bass correction and doesn't seem to address the other critical frequency issues, unless I'm missing something.
I'm simply looking for a nice flat response across the frequency spectrum. That's really hard to do without a proper equalizer. You could play with different speakers and dampening methods forever and still not get it right. It's simply a hit or miss methodology, there must be a better way.
