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<blockquote data-quote="Termlab" data-source="post: 606933" data-attributes="member: 555667">heres an idea....... get a box (lets say 2.5 cuft of internal volume) and make a hole for a round port (or 2).&nbsp; then start out with a certain length of port...... say tune it at 30 hz.&nbsp; have the port stick out of your box (so it doesnt take any internal volume).&nbsp; after you get a good feel for how that 30 hz tuning sounds, cut those same ports down till it tunes it at a different frequency.&nbsp; you will need a program to tell you what its tuned at.&nbsp; but the smaller you make the port (assuming you keep the same amount of ports, and the same diameter, with the same internal volume) the higher its going to tune it.&nbsp; listen to each tuning frequency with multiple songs at multiple levels and at different positions.it would be very time consuming but you can test a bunch of different tuning frequencies with the same internal volume and ONLY CHANGE THE PORTS.&nbsp; it will also give you a feel for how loud your favorite songs are going to play.&nbsp; i dont know if you want to do that or not, but it just clicked in my head and i thought i&#039;d pass it on to you</blockquote>

[QUOTE="Termlab, post: 606933, member: 555667"] heres an idea....... get a box (lets say 2.5 cuft of internal volume) and make a hole for a round port (or 2). then start out with a certain length of port...... say tune it at 30 hz. have the port stick out of your box (so it doesnt take any internal volume). after you get a good feel for how that 30 hz tuning sounds, cut those same ports down till it tunes it at a different frequency. you will need a program to tell you what its tuned at. but the smaller you make the port (assuming you keep the same amount of ports, and the same diameter, with the same internal volume) the higher its going to tune it. listen to each tuning frequency with multiple songs at multiple levels and at different positions. it would be very time consuming but you can test a bunch of different tuning frequencies with the same internal volume and ONLY CHANGE THE PORTS. it will also give you a feel for how loud your favorite songs are going to play. i dont know if you want to do that or not, but it just clicked in my head and i thought i'd pass it on to you [/QUOTE]

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