In Reply to: New to the MG-IIIa, need help posted by kff on October 11, 2006 at 19:18:00:
The reason you are measuring 0.7 ohms across the tweeter terminals is that there is an inductor with relatively low resistance wired in parallel with the tweeter. Without going in to the math, you will essentially be measuring the resistance of the inductor and not the tweeter and even if the tweeter is fried you will measure a low resistance rather than infinity.
Before you go and remove the socks etc as suggested by AndyR, remove the little caps on the ends of the tweeter, and desolder a connection at one end. Then measure the resistance across both ends of the tweeter if you get about 2.2 ohms all is good. If you get infinity (no reading), you will have to send the tweeters back to Magnepan for new ones. You can replace the tweeters without removing the socks.
Also check that your fuses are ok with a meter- on occasion I have had a blown fuse that looked ok (at least to my presbyopic eyes).I may be an egoist but at least I don't talk about other people.
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Follow Ups
- Re: New to the MG-IIIa, need help - neolith 07:33:07 10/12/06 (1)
- Never mind... - neolith 07:45:44 10/12/06 (0)