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<blockquote data-quote="audio_phill" data-source="post: 6232173" data-attributes="member: 605512"><p>Cool, the RE XXX&#039;s are sweet subs, I love the lows the 18&#039;s can belt, they don&#039;t score very hgh (because their efficiency is for crap) but thats not what they are designed to do, they were intended to sound good and play low with minimal distortion, which they do quite nicely, sadly they need massive sealed enclosures to reach their full potential for SQ. I know you declare numbers to be irrelevant but look to be somewhere in the mid to upper 140&#039;s and set your subwoofer X-over somewhere between 60 and 90Hz and let a good front stage pick up from there, some eq&#039;ing on the mids will be necessary to get them to blend smoothly that low down, but all is possible with a capable deck, something like the premier 800prs will do it, 16 band graphic eq and time alignment, 355 shipped from ebay. You&#039;ll need the 24bitt burr brown processing to make use of the subharmonic capabilities of the XXX&#039;s. Thise 2 RF amps are gonna need lots of juice, as many people as this is gonna get flared up, the amps are very inefficient and the power they produce is dirtier than most other comparable amps on the market. Look to RD or IA for power that high that remains of extreme efficiency and warm nice quality. 1 D9 would run that setup forever and you&#039;d think you were listening to a class A/B amplifier. Mine clamps over 5K and with only 1 8D battery extra for it, it won&#039;t dim my lights.</p></blockquote><p></p>

[QUOTE="audio_phill, post: 6232173, member: 605512"] Cool, the RE XXX's are sweet subs, I love the lows the 18's can belt, they don't score very hgh (because their efficiency is for crap) but thats not what they are designed to do, they were intended to sound good and play low with minimal distortion, which they do quite nicely, sadly they need massive sealed enclosures to reach their full potential for SQ. I know you declare numbers to be irrelevant but look to be somewhere in the mid to upper 140's and set your subwoofer X-over somewhere between 60 and 90Hz and let a good front stage pick up from there, some eq'ing on the mids will be necessary to get them to blend smoothly that low down, but all is possible with a capable deck, something like the premier 800prs will do it, 16 band graphic eq and time alignment, 355 shipped from ebay. You'll need the 24bitt burr brown processing to make use of the subharmonic capabilities of the XXX's. Thise 2 RF amps are gonna need lots of juice, as many people as this is gonna get flared up, the amps are very inefficient and the power they produce is dirtier than most other comparable amps on the market. Look to RD or IA for power that high that remains of extreme efficiency and warm nice quality. 1 D9 would run that setup forever and you'd think you were listening to a class A/B amplifier. Mine clamps over 5K and with only 1 8D battery extra for it, it won't dim my lights. [/QUOTE]

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