My original plan was to use my box (2.3cu ft sealed per chamber) for a pair of 15" Diamond Audio D6's but turns out the eBay seller did not have them in stock after winning the auction. So I'm looking at other options that can fulfill this space requirement for 2 decent SQ 15" woofers but excellent at SPL. Many are against Alpine Type-R's sealed (which was my second choice). I'm looking to spend $200 per sub for brand new. The MB Quart RWE's sound real nice (I have the 12") but they recommend only 1.5 cu per woofer. If I ran these, would it cause damage to the woofer? What are the negatives of running more internal space than what the manufacturer recommends?
