i added a pair of 2wq subs to my 3a sigs and it really cleaned up the mid/upper bass. mids and highs also improved. the setup utilizes a 6db/octave highpass filter which is sampled then boosted by the sub. whether the improvement is due to less strain on the 3a's woofer or increased amplifier headroom, i'm not sure. probably both. but the systems performance did improve noticably.
aloha keith
aloha keith