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Extensions on hybrids and tapped horns give more output in the low end but excursion will raise to do so.
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I haven't linked you to any speakers, that part of the message was aimed @ kriptech.however the speakers that you have linked me to are both 18" and not 21"
An (horn) extension will usually do the following:Not quite sure what you mean when you said Extensions on hybrids and tapped horns give more output in the low end but excursion will raise to do so.
For a sub, the wavelengths of the frequency range involved are to large (11.5 metres for 30 Hz) to be affected by wadding, nor is the reflection effectively out of phase with the front wave to be of interest. It can help to remove higher order distortion products from the drivers non-linear movement, although these even order harmonics are often deemed OK sound-wise.I was wondering whether it might be a good idea to put acoustic wadding on the inside of the compression chamber to stop reflections back onto the speaker cone...?
100 Hz might be a bit high (as it's for most true sub enclosures), 80 Hz would be a more practical crossover in my opinion. Almost all 12"/1" tops are capable of crossing at 80 Hz, which means they'll take care of the fundamental part of the kick in the system. One Cubo Sub per side would already give optimal results and is a good match for a 12"/1" top caninet.But how would the cubo sub perform with one a side, and a 12/1 frontloaded top crossed @100Hz? Would there be a gap in the overall frequentie response?
The spec sheet says -10 dB@30 Hz, so I expect Cubo Sub to have a bit more sub, it can be felt as well. The FX20 being a PWH at the top end of the frequency range might be a bit louder there, as it's larger then Cubo Sub.A sub that i like is de dynacord fx20, has nice spl that really can be felt, and they almost can go down to 30 Hz.
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