Box tuning

[Jakeeck 10+ year member]

say my box is tuned at 33 Hz.. does this mean it wont hit the lows in rap songs like 30-32 Hz or what?

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[skmfkr 5,000+ posts]

no, my box is tuned to 35hz and it plays a song that has a 26hz note in it.

 

[spracer03 10+ year member]

sorry for thye noob question, but what does the hz tuned to really mean?

 

[nickolas_j_t 10+ year member]

thread jack!

 

[Immacomputer 10+ year member]

say my box is tuned at 33 Hz.. does this mean it wont hit the lows in rap songs like 30-32 Hz or what?

That is not the case. Around the tuning frequency (about 1 octave above and 1/2 octave below) the sub will see a acoustical impedance which will create a pressure build up inside the enclosure. The pressure will be released around these frequencies through motion of the port air mass. When you play frequencies about 1/2 an octave below the tuning frequency, there isn't an acoustical loading on the sub and the sub will have to rely on it's own braking for cone control. So no, the ported box will not magically stop all sounds below the tuning frequency but cone control becomes degraded which makes LFE more difficult.

The low frequency extension that's going to be possible from an enclosure will rely on the enclosure layout and design (which will affect the front wave and rear wave phase relationship), driver being used, and the environment its in.

I've seen ported enclosures tuned to 28hz only be able to really drop to about 35hz before loosing output and I've seen enclosures tuned to 35hz play flat down to 22hz with no problems.

sorry for thye noob question, but what does the hz tuned to really mean?

It's the frequency at which the air mass in the port resonates naturally. It will also be the frequency that has the least amount of cone movement.