"3-way Passive Crossover Networks" "This program is based on the formulas in Loudspeaker Design"V "Cookbook. Crossover A requires a 3.4 octave spread between the"( "woofer and tweeter. Crossover B requires a 3 octave spread between"*"woofer and tweeter and has a Bandpass gain of 2.08 db.2 "Both need the midrange's electrical polarity"]< "reversed. For more information consult the LDC. It is a very good"F "peice of referance. Below is the circuit topology to be used:"d "e "g "---C1-----l---------------l"i ".........L1.............Tweeter"#j "----------l---------------l")kMl "------C2---l----L3---l----l"wn "..........L2........C3...Midrange"p "-----------l---------l----l"qt "---L4-----l---------------l"u ".........C4..............Woofer"v "----------l---------------l"w:J"What formula do you want to use A or B";A$_ A$ "a" t A$ "b" , "Enter x-over frequency for the woofer";W "Enter the impedance at the above frequency";W1 "Enter the x-over frequency for the tweeter";TE "Enter the impedance at the above frequency";T1QM(WT)^M2(M) "The calcuated midrange x-over frequency is";M2 "Enter the midrange driver's impedance at the frequency";M1C1.!}(T1T):L1A#T1T<C2%(M2M1):L2M1M2:C3Z9{(M2M1):L3j+}M1M2^C4.!}(WW1):L4A#W1Wy "Value for C1 is";C1 "value for l1 is";L1 "value for c2 is";C2 "value for l2 is";L2 "value for c3 is";C3 "value for l3 is";L3 "value for c4 is";C46 "value for l4 is";L4Y "Are You Finished Y or N?";P$l  P$"n" v  , "Enter x-over frequency for the woofer";W1 "Enter the impedance at the above frequency";W16 "Enter the x-over frequency for the tweeter";TG; "Enter the impedance at the above frequency";T1S@M(WT)`AM2(M)E "The calcuated midrange x-over frequency is";M2J "Enter the midrange driver's impedance at the frequency";M1OC1a!}(T1T):L1ݵ$T1T>TC2(M2M1):L2nM1M2:C3_)K{(M2M1):L3:}M1M2`YC4a!}(WW1):L4ݵ$W1W{^ "Value for C1 is";C1` "Value for l1 is";L1b "value for c2 is";C2d "value for l2 is";L2f "value for c3 is";C3h "value for l3 is";L3j "value for c4 is";C48l "value for l4 is";L4[n"Are You Finished Y or N?";P$no P$"n" xr   "Note the capacitor and coil are represented in decimal values"""The following examples for conversion. For capacitors:A$"if the value is 2.2222E-5 then the cap. is 22.2uf. If the value"n&"is 1.7898E-5 then the value is 1.79uf.("For coils: If the value is 3.786E-3 then the value is 3.78mh*"If the value is 2.345E-4 then the value is .23mh.MQ"About the midrange driver."RR"The midrange x-over frequency is calculated by the formulaT"Fm=(Fh x Fl)1/2 . I think this assumes that the midrange driver"V"has flat impedance through out its range. Sooooo -impedance"!X"compensation is a must. Also, it's resonant frequency must be"fZ"at least 1 octave BELOW the x-over point for the WOOFER. This"\"is important otherwise midrange overload is possible."f"This program is FREEWARE so enjoy! I'm just tinkering with "2"programming so some of my methods may seem awkward to the more"w"experienced users BUT the calcuations should be correct. They""were tested with the results from using a calcuator. In other""words I make no warrany of any kind for this product. Any"0"question????? Contact me on Madisound's BBS"N"Written by Larry Stark"T