My initial impression of this sub is very good. The bass is very tight and controlled for a 15" dual ported design. I assumed I would be giving up a some musical reproduction accuracy when I switched from my 2x Paradigm PW-2100 subs to this one but I don't believe I have. I believe it actually sounds tighter and more accurate than my PW-2100's for music reproduction. It has a very nice smooth sound and seems to be integrating with the mains better than my PW-2100's did. I can't explain it any better than that and I can't explain why this would be the case.
I watched a few clips with good bass tracks and was again impressed with how tight and even the bass was. I was also impressed with how hard it hit. The scenes that have that chest pounding bass bass really...um, pound you in the chest, butt, feet, head, etc. We then watched a movie with the kid's (Surfs Up on DVD) and I was even more impressed. I noticed scenes where the bass didn't "sound" loud but you still felt impact from the sub. It was subtle and wasn't overbearing. It just felt natural. I had never seen this movie before so I can't comment on this sub vs. the PW-2100's on it.
My wife and I put the kids to bed and watched Underworld on Blueray. I have seen this movie many times so I was able to do a pretty good comparison between the two subs with this movie. The A5 - 350 was amazing with this movie. There were scenes where the sub would hit with so much force that I was like "wow, that was more intense than I recall...". I also noticed some scenes where the bass doesn't sound loud but you still feel impact.
I think the thing I am noticing most about this sub, compared to my old subs, is how effortlessly it reproduces the bass frequencies. It hits with so much more authority but never seems to be really working hard doing it. I think the Pararadigm subs had to work so hard to deliver some of the notes that they were getting muddy. This sub extends all the way down to 18Hz in my room with no problem and has so much more headroom than my pair of 10's ever could.
Here are some graphs I saved during my tweaking and tuning of the sub yesterday. As you will see, I had an overall better starting point with this sub and I actually had something to work with bellow ~30Hz.
I applied a house curve and two filters on the BFD
along with what the Audyssey program PEQ applied and ended up with a pretty good response. My room has some pretty strange acoustic characteristics as you will also see but this sub gives me a much better starting, and ending, point. I still need to do some additional treatment for some peaks and nulls around the crossover point (80Hz), just above it, and elsewhere throughout the upper frequencies.
Here's the sub only with no filters applied on the BFD and no Audyssey filters.
Here's one of the A5-350 (blue line) compared to my PW-2100 (red line)
Notice how much more I have to work with below ~30Hz on the eD sub.
After adding the mains
Continued in next post...