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I vote for a PR design. Today I started working in one, a AV15X with PR18-2100's, tuned to 15.5hz. Yes it is more money but also is a smaller box than ported and no port noices to worry about. Maybe a PR design sub has the best of the ported and sealed design subs, any opinions?
 

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SteveCallas, yes I heard of a PR's subs having a steeper rolloff than ported or sealed subs. The distortion of the PR sub being higher that the ported at tuning, I did not know that, the difference is minimal, right? I've heard of quite a few people having port noises when pushing the sub hard, even some that are lower tuned so I guess that's one disadvantage of the ported design. Also, in my case due to space limits and WAF I had to go with the PR design. Like it has been mentioned before, each sub design has its strenghts and weaknesses.
 
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