SPICE unlimited

[Hoerninger]

1) ftp.heise.de/pub/ct/spezial/spice3f4.zip
SPICE 3f4 compiled by Wolfgang Mües for Win32.
There are no limitations of number of parts or nodes and you may use and distribute it for free.

2) LTspice/SwitcherCAD III
Updated october 19, 2007.
It is free and it seems to be unrestricted.
____________
Peter

[yggdrasil]

LTSpice works great. It is very easy to use since it is integrated with the diagram drawing.

You will have to go hunting for spice models, as the distributed models are minimal.

[Hoerninger]

How to simulate speaker / crossover using OrCad
(both together)

http://www.shine7.com/audio/orcad.htm
http://www.shine7.com/audio/orcad_2.htm



Enclosures were dicussed in Speaker Builder 3/91.
____________
Peter

[Hoerninger]

Spice Simulation of a Loudspeaker with Thiele Small Parameters

On
http://micka.de/org/en/introduction.php
you can find an interesting approach to use TSP within Spice. The recalculation is done within the circuit file:
http://micka.de/org/en/download/spice-tsp_en.pdf
It is demonstrated with LTSpice. For your own examination download
http://micka.de/org/download/spice-tsp.asc.zip

---------- Spice File ------------------------------
* C:\***
V1 Vin 0 PULSE(0 1 0 1n 1n 50m 100m) AC 1
Rg N001 Vin {Rg}
Re N003 N002 {Re}
Res N003 0 {Res}
Cmes N003 0 {Cmes}
Lces N003 0 {Lces}
Cmep N004 N005 {Cmep}
Lceb N005 0 {Lceb}
Rel N004 N003 {Rel}
C1 N005 0 1.8µ
Le N002 N001 {Le}
.ac oct 300 10 10k
;tran 150m
.param ws=2*3.14*fs
.param c=345 rho=1.18
.param Cas=Vas/(rho*c*c)
.param wb=h*ws
.param Cmes=Qes/(ws*Re)
.param Lces=1/(ws*ws*Cmes)
.param Res=Qms/(ws*Cmes)
.param Lceb=Lces*Cab/Cas
.param Cmep=1/(wb*wb*Lceb)
.param Rel=1/(wb*Cmep*Ql)
.param Qes=Qts*Qms/(Qms-Qts)
.param Cab=Vb/(rho*c*c)
.param fs=26.0 Vas=109 Qts=0.33 Qms=2.23 Re=5.96 Le=0.53m Rg=1m
.param Vb=40.0 Ql=4.5 h=1.18
.backanno
.end
---------- end ------------------------------------
____________
Peter

[4313B]

Wow! I haven't seen this stuff since the late 80's / early 90's! That's how we used to have to do it.

[Hoerninger]

http://kom.aau.dk/~hmi/Teaching/LTspice/restrict/LTspicedoc/LTspice_guide.pdf