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<blockquote data-quote="n2audio" data-source="post: 8537363" data-attributes="member: 540940">Looks to me like you&#039;re box limited more than power limited.&nbsp; Assuming the subs are properly wired for 2 ohms they should be seeing close to 500w rms each.&nbsp; Even if your electrical system could supply an amp twice as powerful you&#039;d only see ~25% increase in volume.The box, however, is tuned high, and on the small side.In modeling that box -- if you trust the specs of the port (2.5 x 12 x 13) -- The tuning frequency is actually above 40hz.&nbsp; I&#039;m getting 41-43.&nbsp; What that gives you is is a big peak (ripple) in output at about 50hz, but it comes at the cost of low frequency output.&nbsp; You&#039;re down 3dB at about 41 hz and down 6dB at 36 hz.&nbsp; ~35 is a critical range, IMO, if you like some low bass music.&nbsp; You want to be just starting to roll off at that point, not 6dB down.On top of that the port is small for a ~20mm xmax 12&quot;.There&#039;s quite a few discussions on box design for those subs.&nbsp; Looks like people are regularly doing 1.75-2.0 cf per sub and tuning them low-mid 30&#039;s with ~20 sq in of port area.It&#039;s a lot more work than just buying more power, but ultimately, if you want the best from those subs you need a bigger/lower box.</blockquote>

[QUOTE="n2audio, post: 8537363, member: 540940"] Looks to me like you're box limited more than power limited. Assuming the subs are properly wired for 2 ohms they should be seeing close to 500w rms each. Even if your electrical system could supply an amp twice as powerful you'd only see ~25% increase in volume. The box, however, is tuned high, and on the small side. In modeling that box -- if you trust the specs of the port (2.5 x 12 x 13) -- The tuning frequency is actually above 40hz. I'm getting 41-43. What that gives you is is a big peak (ripple) in output at about 50hz, but it comes at the cost of low frequency output. You're down 3dB at about 41 hz and down 6dB at 36 hz. ~35 is a critical range, IMO, if you like some low bass music. You want to be just starting to roll off at that point, not 6dB down. On top of that the port is small for a ~20mm xmax 12". There's quite a few discussions on box design for those subs. Looks like people are regularly doing 1.75-2.0 cf per sub and tuning them low-mid 30's with ~20 sq in of port area. It's a lot more work than just buying more power, but ultimately, if you want the best from those subs you need a bigger/lower box. [/QUOTE]

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