I agree with Unsound in regards to, 2 subs giving you more base. I have 2- 2wqs and 3a signatures the improvement is more in the resolution of the mids and highs of the sigs, of course with great bass. If you are using more for HT you definitly need a sub even with the 3a sigs. I would get another sub or get the 2ce sigs and my 3a sigs are for sale at a great price.
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