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A 300 liter box tuned to 25 hz would be the minimum ( -3 db at 32 hz). A more ideal box is 550 liters tuned to 20 hz. This gives you a very shallow roll-off from -3 db at 55 hz to -4 db at 23 hz. The incredibly low excursion of the woofer shows it bottoming out with more then 20 watts when you get below 40 hz.
Messages. 97. Popping sound can be a symptom of the speaker surround which attaches the cone to the basket (metal frame of the speaker)being torn. The popping sound results when the speaker voice coil rubs against the tube in which the voice coil travels. Try listening at very low volume and see if you hear the popping.
If you had a CD with 1/3 octave test tones from 10Hz to 20000Hz, you could just "feel" the cone as you plays tones of frequencies 10, 12, 15, 17, 20, 22, 25, 28Hz at low volume levels. When you get to the frequency where the cone doesn't move much at all, that'll be the resonant frequency, give or take 2Hz.
A) Two drivers will yield 3dB more than one. Four drivers will yield 3dB more than two. (Assumes a single amplifier, equal total impedences, and equal power levels.) This is a result of the doubling of the cone radiating area which yields a better acoustic impedence match (i.e. moves air more efficiently.)
I was watching a hockey game and the subwoofer started "popping" almost like it was clipping. I checked the speaker cone and it was intact. The crossover is set to 80Hz on the speaker and the volume control is set to about 60%. Changing the crossover frequency did nothing...changing the volume control, however did. Higher, it popped more.
Adding more damping to the box means that the woofer has to force the air in the box through the damping material. This slows down the air flow in the box and makes the box appear to be larger than it is. For instance. Our SW-12A woofer needs an optimal sealed box of 1.363 cubic feet with no damping to have a .7 Qtc.
Even at very low volume I can hear the problem noise but the cone never comes close to the wires. I'll post a video tmw so you can see the sub in action and also hear the noise its making. thanks! Nov 15, 2010
With deep, fast bass and a gorgeously crafted cabinet, the SVS SB16-Ultra offers reference quality lows that integrate seamlessly thanks to its handy app-based DSP controls. Some port noise at extreme volumes and a high $2299 price may limit appeal, but overall it delivers powerful, clean bass in an attractive package.
Auditioning. Joined. Jun 2, 2003. Messages. 2. The last time I checked, I wasn't in the market for a new set of speakers. Then I came across the opportunity to buy a pair of used Carver AL-III Plus speakers for $350. I'd like to get some opinions on these speakers. On audioreview.com the AL-III's received numerous glowing reviews.
Conclusion. The M&K Sound X15+ doesn’t seem to fear any content, no matter how high you crank the volume it just keeps getting louder. If you do somehow reach a point where it can’t go any further it smoothly engages protection mechanisms and prevents itself from coming undone. The X15+ subwoofer is insouciant when driven, it doesn’t care ...