Originally Posted by Geoff4RFC
I was with you until the don't come close statement. A7's maybe don't come close, but A9's? Come over to my place and I'll give you a demonstration that "should" change your mind.
Of course, I'll go on record and state that my four A9's don't hold a candle to my two Empires in power delivery, or the ability to move as much air as the other, but the accuracy is there. In fact I screwed myself once by giving my wife a demonstration of the A9's capabilities, the LFE was felt in the floor and transferred into the seats we were in. Instead of being impressed, she looked at me and quipped "Why do we need the subs again".....oops
I stand by my statement. The A7 & A9 are a great speaker but they do not hold a candle to a quality ID sub in 15-80hz bass reproduction. They do sound awesome, I have watched movies with no subs and was impressed with how good the bass is, but they do nothing below 30hz...which is to be expected. Also the port tune contributes to the audible bass range which adds a slight amount ringing to the bass. However I absolutely preferred them over a pair of PSW505's I had...the A7's blew them away in quality.
Fwiw I have heard A9's, they have a couple DB more clean head room over a A7 with proper amplification. They do not dig any lower and the tweeter starts to compress and get a tinge of harshness when driven at extreme levels. Some act like A9's are SO superior to A7's and that is simply not true. Adding 1 more 7" bass driver only increase displacement by 25%, that equals 1db feeding both speakers the same amplification. They are significantly better in the mid bass range being they have dual 5 1/2" mid bass drivers, but again the tweeters are the same...Harsh when driven hard! I am not talking what most consider loud, I am talking about concert level! I have been a Polk fan for 20yrs but there are better options if you want a reference level+ capable speaker that is not fatiguing to the ear.
That being said the whole point was there is no need for a A9 or A7 if you have quality subwoofers. Some just like the look of big towers and assume that it must be better and that is simply not true.
I am sure 4 A9's with good amplification sound great full range, was not implying otherwise.