View Full Version : Port location
06-23-1998, 11:21 PM
I'm taking on the challenge of building a box for one of my Crunch 10" subs. Does it matter where I put the port. With the designs that I have been messing with, the port would go best in the rear of the box. Bonus question!! I presently have 2 10" subs run by a 50 wpc amp. By my calculations I shouldn't lose any db's by cutting my woofer sq ft in half but doubling my power. Is that correct? I will be moving from bandpass to ported, but I don't think the bandpass is proper for the woofers anyway. Thanks
06-24-1998, 12:08 AM
You are correct theoretically speaking and with all else being equal. Double cone area and you increase output by 3 db. Double power and you increase output by 3 db. So halving cone area and doubling power should, theoretically, be a wash. It doesn't necessarily work that way however. If the sub reaches it's peak excursion, thermal power limits or, most likely, compression, before you can give it double the power then the theory doesn't translate to reality. Something to think about.=Blues=
06-24-1998, 12:13 AM
The port can be located anywhere on the enclosure as long as it fires into the same area as the cone itself. I feel that it is preferable to locate it on the same baffle as the woofer itself.=Blues=
06-24-1998, 02:19 AM
when deciding where to put the port put it on a surface that will give the best performance .
meaning try to mount ittowards the interior of the vehicle (towards the listeners ) for the best and maximum performance . Make sure you allow room for the air to expell the air from it. typically leave room in front of the port. leave a gap between the port and any obstructions usually the air gap should be equal to the diameter of the port. I hope this is clear .
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