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First, please don't put your question only in the subject line; it needs to be in the message body, like this:

Subject: Loudspeaker model

Message: Is there any good 8 Ohm 0.5W loudspeaker model?

There is information on loudspeaker models in the list archives. Go to the web site and download and save? all_files.htm. Open in in your browser and search (CTRL-F) for speaker and loudspeaker (separately).? 8 ohm is relevant to the modelling, but 0.5 W isn't. The power rating (which is a very vague thing and is related to things like voice-coil temperature and cone excursion that electrical models do not cover) is only weakly related to the model - a 0.5 W loudspeaker is likely to be a small one and therefore have a main resonance in the frequency range 250 Hz to 450 Hz.

John Woodgate OOO-Own Opinions Only
J M Woodgate and Associates 
Rayleigh, Essex UK

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