I have found in my experience that if you have more power than you know what to do with that sealed is the way to go. However if you have a small amp and you would like to get more out of it that ported box's are louder but will not hit as low, you know that ripple that runs up you back, ported give you a loud paperflex sounding bass where with big power sealed is more controllable and deeper sound. I always say if you listen to rock/r&b/rap ported is the way to go with a moderate sized amp, r&b/rap with a big amp go sealed you will not have to be at the warrany shop as much.

Remember, to all the people you read this, all the amps and subs in the world need enough power. Lack of power creates heat and heat is car audio's enemy. Anytime you under power something it struggles to maintain its output and clips and creates heat and will go thermal. Big power equals a power upgrade to you electrical system and a cap is a bandaid on a bullet wound, alternators are where the power is born.

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hope someone got something out of this!