AVS Forum Special Member
Join Date: Dec 2009
Location: Central Florida
Mentioned: 5 Post(s)
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I have read and re-read every review and still am impressed at the herculean effort you guys put forth. Can you guys start an audio review website? Seriously.
On another note, the only comment I have is this: the A7s-450's performance becomes MUCH improved with the up-until-recently included for free eQ.2. I got mine for free with my A7s-450 and used it, in conjunction with my buddy's pro-audio hand held full spectrum RTA to flatten my in-room FR.
My living room is an open area about 24'x24' with a vaulted ceiling (11.5' at the center hi-point), with a poured concrete foundation (single story residence). Using the eQ.2, I'm now ruler-flat from 63hz down to 25hz, with a 3.5-4ish dB drop at 20Hz. I have it crossed over at 70Hz from my mains.
The character of the sound has DRASTICALLY changed. I went from an A2-300 to this, and the A7s now definitely has a 'rounder' and fuller bottom end than it did previously. The 'boom' is back in a big way. Before using eQ.2 (and the 25Hz boost switch, which I am also employing), I had a sharp roll-off at 35Hz and a strong peak at 58-62Hz. This was to be expected in my room. I can't emphasize enough the HUGE change in the character of the sound.
I said all that to say this: If a company offers an upgrade, I know it's more work to do an A/B, but I wish you guys would have employed the eQ.2 with the A7s-450's eval.
It's such a powerful tool (and even reasonably priced at $85 if bought concurrently)that I believe should serve to work for the eD. Having a sealed sub with the most output (A7s-450), the most powerful amp (A7s-450), and the most headroom (A7s-450) makes it the BEST candidate in this entire shootout for accepting meaningful amounts of eQ while still maintaining good overall headroom. Adding eQ to a ported sub is a tricky proposition unless you have a subsonic filter you can use to filter below the port tuning frequency (The eQ.2 has this feature as well). The fact is, the eQ.2 would be an advantage to nearly every sub in the competition in some fashion or another (for EQ purposes or just a quality outboard subsonic filter). It adds so much, I feel the review of the A7s-450 would have gone much differently if that tool was utilized. It's made such a huge difference for me, I don't think anybody who owns it would not take advantage of it. Another alternative is to use Audyssey Multi-EQ on all the subs, with each in the same position. Just my $.02
Arcam AVR300, Adcom GFA-5500 (Main L+R), Acurus by Mondial A200x3 for center and surrounds, Panny BDT-500 Media Transport, Toshiba SD-9200 CD Transport, MiniDSP 2x4 HD, Vizio XVT 55" LED/LCD (full direct-backlit w/ local dimming), Darbee DVP-5000S, Center and L+R is pending, pending subwoofer.