First my original system (which happens to be my first):
-Camry 07 SE
-Amp: Eclipse XA4000- rated 125rms to the components, 350 bridged to sub
-Head unit: Kenwood Excelon DDX8017- excellent unit btw
-A/D/S 346cs 6.5 components- tweeter in the sails, woofer in the original factory location- both doors double layer of sound deadener with neoprene baffles
-rears- who cares - theyíre factory
-sub: Infinity Kappa Perfect 12.1 in the truck sealed in 1 c.f. with polyfill
First comparison with Hertz hsk165.4 in the left side and A/D/S on the right.
The hertz tweeter is just so smooth. These are the best tweets that Iíve heard so far. The vocals arenít harsh and the cymbals are visible but not in your face. The tweets were aimed at the passengerís ears as the manual recommends. They just exist enough to be heard but donít overwhelm the sound. Definitely more visible than the A/D/S tweets. The voice (I used different CDís ranging from Kid Cudi, Pink, to U2) are smooth and clear with the Hertz. Used the Hertz crossover on the left side.
The woofer is a different story- it really didnít distinguish itself too much from my A/D/S woofers, which look much better imo. The lower frequencies (bass) are somewhat weak with both woofers. The midrange is ok- nothing that stands out. Note that they donít suck either- theyíre both good enough. It could be that Iím not driving enough Power to the Hertz, so take that into account.
Given that I felt the Hertz set was simply better than my A/D/S set I didnít bother to compare the A/D/S set with the CK6s.
Therefore I replaced the right side with the CK6s and itís crossover.
The ck6 tweets are harsh. I know that in one review I read you need to give it time to break in the tweets but I canít imagine them getting much softer to my liking. The tweets are the newer silk dome 28mm tweets. The cymbals are crystal clear, but too clear in my opinion. They have more detail than the Hertz, but I really think this seemed to be the case because the ck6 tweets were simply lounder. When I set them at -3db the still were too in-my-face. They almost sound like the Infinity Kappas tweets that I heard in my friendís Car several years back. The vocals are the same, but loud to where I swear Bonoís voice was straining or even somewhat muddled (same opinion from my girlfriend in the passenger seat). I even switched the crossovers with the Hertz system during this trial. I messed with the db and set it at -3, 0, but didnít bother with +3. I also did the same with the Hertz set. Now I did a comparison with these two sets for 2 hours (really wanted to like the tweets of the ck6 and thought maybe my headunitís settings were off, but each time came to the conclusion that my ears would eventual strain with these tweets). Those of you who like the tweet to be a little stronger will love em, but be aware that I really felt the vocals were strained.
Now for the ck6 woofers- completely different story. These are badass woofers . DAT wasnít lying. They are simply wonderful- rich and full of bass. Instruments and bass lines during U2ís Actung Baby soundtrack were heard that I didnít know existed. For example it handled ďtryin to throw your arms around the world- track 9Ē Ė something my A/D/S struggled to do well when Adamís bass guitar starts in the song. Midrange and midbass is excellent. And for the first time, my sub was not prominent in any of the tracks- the woofers mixed very well with the sub. They simply filled the car with rich sound. Again crossovers were switched and I even switched the tweeters. They easily took the Power from my amp and put out a great sound.
I spent two hours comparing these two sets- somewhat became obsessed to be honest. I changed multiple settings on the headunit- changed the crossovers- mixed the woofers and tweeters- I canít even remember all the different combos I tried. Basically in the end I found the tweets of the Hertz set and the woofers of the ck6 set to work the best. I kept the massive audio crossovers also. I am quite happy with this combo- until the next thing hits of course .