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<blockquote data-quote="David Morison" data-source="post: 216448" data-attributes="member: 2076"><p>Any modern driver will have enough extra output potential compared to the 151's that 2 4" ports will be nowhere near enough.</p><p>How much woodwork are you willing to do? If you're not prepared to at least cut holes and install a few extra port tubes, there may not be much improvement to be had, IMO.</p><p>It may also be worth increasing the amount of bracing (depending on what's in there at the moment of course) if you want to up-gun it much too.</p><p>Even the Eminence Sigma Pro mentioned up-thread (not a particularly high spec driver nowadays TBH) would merit at least 4 4" vents, if you were planning on being conservative and never taking them past their nominal Xmax, which would occur at well under full program power for those drivers.</p></blockquote><p></p>
[QUOTE="David Morison, post: 216448, member: 2076"] Any modern driver will have enough extra output potential compared to the 151's that 2 4" ports will be nowhere near enough. How much woodwork are you willing to do? If you're not prepared to at least cut holes and install a few extra port tubes, there may not be much improvement to be had, IMO. It may also be worth increasing the amount of bracing (depending on what's in there at the moment of course) if you want to up-gun it much too. Even the Eminence Sigma Pro mentioned up-thread (not a particularly high spec driver nowadays TBH) would merit at least 4 4" vents, if you were planning on being conservative and never taking them past their nominal Xmax, which would occur at well under full program power for those drivers. [/QUOTE]
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