Ok, my turn. I am going to be as honest and blunt about things as humanly possible and not sugar coat things. Understand that this is strictly my opinion and if you disagree or I have slammed your favorite speaker in the world this is just MY opinion and what I like and dislike about a speaker system etc. Also understand about me that I listen to a lot of Jazz, Fusion, instrumental and smooth music and lean towards the "east coast" sound. I do have lots of rock, some of it very hard which I usually listen to in my truck so I do have a broad spectrum of accepted music genders.
I'll jump to the chase and the shoot out and then review the other players of the day below...
Oh, this is actually a good evaluation for me to make as I have never heard the HPM or ADS in my life. The ADS absolutely blew away the HPM in every respect by a huge margin. Did not matter what amp or what source the ADS sounded way better balanced, very smooth from top to bottom, rock to jazz, and no matter where they were placed in the room. The HPM's on the other hand sounded shrill, mid rangy, boomy on the low end and overall very non musical no matter what the material or amp. Sorry, that's how 4 out of 4 heard it and it was not something we even had to discuss. And for the record this is the first time I have met any of these guys so I'm not siding with my Bros :>)
On a side note and something kind of funny that was alluded to earlier, I told Charivari I would be interested in the HPM at an excellent price he offered (this was before the shoot out) and after the shoot out I had to risk loosing a 3 hour old friendship to make sure these did NOT end up going home with me. We argued for about a half hour about it and the bottom line is JP took the speakers home. I felt bad about it but truly had no idea that speakers would be so bad. I'm sorry if I have stepped on toes here but I felt you guys wanted an honest opinion.
So for the rest of the speakers in the room I will rate them good to bad below BUT please read blow my results as I feel some of the speakers were at a huge disadvantage due to placement.
ADS
KLH stack
AR9
AR91
AR1
DA-12
APM
HPM
ADS - The ADS were the most balanced and least picky of the bunch. Nice smooth highs, nice clean accurate mids and good tight bass.
KLH stack - The KLH stack was the stunner of the group and sounded great, smooth, musical and just plain nice. Lows were slightly flabby, highs not the best I have ever heard but simply a good sounding setup.
AR9 - To tell you the truth I was a little disappointed in the AR9's. Highs were good but seemed to forward and a little bright, the mids were good but a little hot and the bottom was boomy and odd sounding. I am 98% sure this is completely due to placement. These speakers are setup all wrong. Set up right I'm guessing these would leap to the top of the list. With room for the woofers to breath it would instantly become a much more well rounded speaker. I think JP hit it on the head, the AR9 are boomy on the bottom in their current placement and turning the bass down sucks that out of it but also greatly disrupts the balance of the speaker and makes a big hole in the upper bass making the bottom boomy and the top to bright.
AR9 note - I noticed the mid woofer on Scotts AR9's were not the same. I would replace the non original one ASAP
AR91 - I personally did not care much for this speaker, seemed unbalanced and odd sounding. Not bad but not real good ether. Cab seems really small for a bigger bass driver and just not very balanced. Could be a placement issue as well and I highly suspect it was.
AR9 / AR91 stack - this sounded much better than ether alone. Why? the AR91 did a great job as filling in the issues with placement on the AR9
AR1 - Not really what I expected but good mid range detail
DA-12 - Well sitting on one tweeter face with the woofer pointing back and in these never had a chance to sound good but you could tell they are musical and have potential. I have them with me so I'll post further when I get a chance to hook them up right. I am thinking these are going to be good speakers, if not very good speakers.
APM - Kind of vanilla, sounded OK, not horrible not great. Sound better at my house with proper placement but still not great speakers. They are what they are.
HPM - In my opinion these are some of the worst sounded speakers I have had the opportunity to listen to. Harsh, distorted and fatiguing come to mind. Lots of mids and bacon frying sounds. The bottom was OK but could be boomy and flabby sounding. this is my honest opinion and one that I did NOT want to have. When JP brought them in I was salivating over the quality look of the drivers, the amazing construction of the cab and the overall quality, I was thinking I had scored until I heard it. We tried both amps and all sorts of music and all agreed without hesitation that these were the worst speakers in the room. I really did want to like them, I do not.
All these compared to my Maggies - In the end and in my own opinion I think my maggie / MK setup is on another level sound wise. Nothing in this shootout on this day TO ME sound even close to as good. I'm guessing the upper end ADS would be in the running if it is just more of the good sound I heard from the 810. Yes, I'm sure this is a highly bias opinion and the speakers in the shootout have not had the amp matching and setup time my maggies have had at my home but it is still my opinion. Even with proper placement the AR9 is going to have a hard time beating the maggies IMHO. I will get those AR90's of mine running shortly and have a little shootout of my own and see whom can knock the maggies off the top spot.
Again, I am NOT out to slam HPM owners. They have different needs than me obviously. I don't dispute that yours may sound terrific in your setup. the pole clearly showed them to be the prefered speaker so I know they have a big following and must be good to those people in their environment.
I'm sure many people might hear my Wharfedale W90's and think they suck. For rock they do. For Jazz etc they are excellent. In the end it is all just perception and what we like to hear in our system. The above is what I like and what sounds good to ME.