You're wrong. Unless you cross the sub over at something ridiculously high like 200hz (that's not going to sound good), there IS going to be a frequency hole, and it IS there. It's impossible for the 3 inch drivers to extend down to around ~100hz in a relatively flat fashion (which should be in the region where the sub crosses over). The sats are going to steeply roll off in the 200hz reigion. No amount of EQing is going to fix that.
http://www.jonnyguru.com/modules.php?name=NDReviews&op=Story4&reid=251 This is exactly what I'm talking about.
I already know the frequency response of the speakers, I read that very article which actually persuaded me to give them a go!
The dip is at 150-200Hz, that's below midrange.. (300Hz-5Khz generally), if you read his impressions, he gives a very positive impression overall, noting lots and lots of positives and obviously it's not so strong points, but I came away with a very positive impression which as I said prompted me to go and try some SP2500's..
I've heard the SP2500's, aswell as the R1600T's and R1900T's.... not heard the 6c's though. I can't understand why you'd think the SP2500's sound better than any of them though unless you're a total basshead.
Again, I'll use Johnny Guru's impressions, there is plenty to like for these..
Corsair has done a fantastic job right out of the gate with these speakers. I am not easily impressed, but I certainly was this time when confronted by the sound quality coming out of a $200 set of "computer speakers." Do these compete with more expensive options? No, not really. But if all you want is a decent set of speakers at a reasonable price, this is what you want right here.
What?
I don't understand your confusion, I'm suggesting that having a single woofer having to cover bass and midrange means some compromise in it's dynamic.. When the woofer is extending with good bass, how it then deals with reproducing the good accurate midrange, it depends on many factors like how it's damped, etc, etc.. Frequency response is a swept tone, it does not remotely hint at how they react to different types of music..
You can't say the midrange speaker size of the SP2500 is compromising things, and not think that having a single woofer covering 50Hz-5Khz isn't also going to have compromises..
The R1600T's are near fields... they're not a Hi-fi set. If that's not your problem then something must be wrong with your R1600T's. Mine sounded fine at max volume when I had them.
To be fair, I didn't think I'd suggested they wheren't, I was just confirming to the OP that the SP2500's are near field, and like any near field speaker (including the Rt1600's) they don't sound so good if trying to fill a room..
The thing is, when cranked up, the RT1600's start sounding a little strained, they are still better then just about anything else I've heard under £100, but you clearly haven't really back to backed them with the SP2500 which just holds it's composure so adeptly (for it's price)..
I still like the RT1600's, why do you think I run them in the kitchen? I am not going to buy rubbish, but this whole '2.0' must be better nonsense might be true in the higher price brackets, but quite frankly, down in the sub £200 region, no 2.0 setup remotely sounds anything like my moderately OK proper audio setup (Arcam/Dynaudio and Rotel/B&W), it lacks everywhere, at least for ME, the SP2500 has the controlled sub-bass, clarity and seperation that I am happy, despite technical 'holes' in the bass region..
The thing is, I buy a reasonable amount of kit, and I base it's performance relatively, If someone was talking sub £100 speakers, I've put the 6C's and RT1600's forward as recommendations in other threads.. but if you think they stomp all over the SP2500, you would be wrong.. they cost more, and luckily they also are worth the money, they don't touch my hi-fi kit, so I wouldn't tell someone to buy them if they had £300+ to spend either.
I think I come accross all wrong, I do like the edifiers, I would love to try the 6C's (and might just get a set for myself for Christmas for my spare room , setup), and I often recommend these are choices for people to try, so in reality I agree your speakers are very worthy.. however I can't lie and bring myself to hate teh Sp2500',s my ears just like them, and there are so many positive user reviews, I can count unhappy people on one hand..