High Efficiency Speaker Asylum

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RE: Not too much power, I think

Posted by Bill Fitzmaurice on January 14, 2012 at 10:46:26:

"However, if your amp has any hum, that might become obvious with the more efficient folded horn design."

With a fully horn loaded driver perhaps, but not with a rear loaded horn. A front loader can run well over 100dB sensitivity, whereas a rear loader's sensitivity is only that of the raw driver. The horn doesn't give broadband gain, just in the lows where a low Qts and/or small Vd driver would have inadequate output otherwise. The Fostex FE126En only has 93dB sensitivity, so hum shouldn't be a problem.