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<blockquote data-quote="Mr Cabinetry" data-source="post: 2899650" data-attributes="member: 571490">Well, Naturally your going to get a given amount of db&#039;s increase if you up the port tuning, but only in terms of the peak response in vehicle.SPL is going to increase as well and at what point it hits with a 44 hz test tone to the cabin gain frequency is where your going to hit at and if your aiming for the highest possible SPL/db gain, your going to need a meter to measure that to determine that if your goal is to compete.He!!, I know someone that has been trying to break 150 for the pass couple of months and tired different enclosure&#039;s at different port tuning freq&#039;s using the combo of subs and amps and finally broke 150 yesterday using 2 subs and one amp.So, it really all boils down to experimenting with the combination of subs/ enclosure design to find what your desired goal.&nbsp; Your not going to hit it first time right out the gate.</blockquote>

[QUOTE="Mr Cabinetry, post: 2899650, member: 571490"] Well, Naturally your going to get a given amount of db's increase if you up the port tuning, but only in terms of the peak response in vehicle. SPL is going to increase as well and at what point it hits with a 44 hz test tone to the cabin gain frequency is where your going to hit at and if your aiming for the highest possible SPL/db gain, your going to need a meter to measure that to determine that if your goal is to compete. He!!, I know someone that has been trying to break 150 for the pass couple of months and tired different enclosure's at different port tuning freq's using the combo of subs and amps and finally broke 150 yesterday using 2 subs and one amp. So, it really all boils down to experimenting with the combination of subs/ enclosure design to find what your desired goal. Your not going to hit it first time right out the gate. [/QUOTE]

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