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In Reply to: RCA-Fan - would you have AJ input example of hit horn available? posted by freddyi on February 7, 2007 at 12:26:47:
Follow Ups:
thank you very much - - are halfhorn vents flare usually specified as "parabolic"? is it tough to get some drivers to model with some hit? - heres a bumbled try with B102 - didn't get inductance input
your woofer is over damped--otherwise looks good.
you want to fool with mouth to optimise at 110Hz
will a bit of serires resistance help overdamped cases? 65l rear chamber seems kinda big for 10" (?)can AJ model transflex or only aproximate in two runs combined?
Glad to see you have AJ-- it is a must
Have to go now
Bill
416/421/2220/M151 pile of Eminence 15, PYM1298 12, Beyma 10g200/12CX, SP12,D123,SP15B,SP15A etc
When I am after high efficienvy, resistors are a bad word.
This box is very forgiving of driver T-s
jut remembered that my samples (and others have found this too )of SP15A had 2 ohms series resistor hidden behind a frame spoke - so SP15A withou9t the resistor was almost like a 4 ohm 15L having Qts ~0.18what makes this more stange - IIRC (?), Ev published SP15A with vas=9.9CF, fs=45 and qts = 0.45 giving a 15CF box via Keele's calculator method
SP15A with 2 ohm resistor in place
Revc= 4.6731 ohms
Fs = 35.8275 Hz
Zmax= 95.6706 ohms
Ro = 21.1441 ohms
F0 = 24.8760 Hz
F1 = 51.6394 Hz
Fmin= 285.7841 Hz
Qms = 6.0571
Qes = 0.3111
Qts = 0.2959
Le = 0.4136 mH @1kHzSp15A resistor bypassed with alligator lead
Revc= 2.7835 ohms
Fs = 35.7778 Hz
Zmax= 94.0246 ohms
Ro = 16.1778 ohms
F0 = 22.5473 Hz
F1 = 56.4867 Hz
Fmin= 285.3875 Hz
Qms = 6.1268
Qes = 0.1869
Qts = 0.1814
Le = 0.4041 mH @1kHz
there's a speaker realm where things are "helped" and sometimes "augmented".. maybe series R will be eventually exhalted to get Qes up to a nice phat 2
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