Quote:
SteveCallas wrote:
 Ilkka tested a TC2k 15" outdoors using a 2400 watt amp and a 10-100hz sine sweep. It was tuned even higher, around 16-17hz, with no highpass filter, and it took all the power up to a 110db-115db sweep with no bottoming. The TC2K and RL-p15 use roughly the same motor, so the RL-p18 should be at least as capable in terms of handling power. |
Steve,
~16.5 Hz tune that I measured causes smaller excursion in 20-30 Hz range than a lower tune. Lower tune has more protection only *below* the tune.
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So that FR is with no mains in play? Hmm, the upper bass looks way too flat for that to be possible - TC motors have notoriously high Le, creating a slight rolloff above 50-60hz or so.
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The roll-off isn't that obvious in larger enclosures. If you look at the 270L I measured, it's only around 4-5 dB from 50 Hz to 200 Hz. Also look at Bradley's scale: 10 dB/div.
