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New MMGs, Burned Tweeter? - Crossover Schematic or Picture?
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Posted on January 13, 2016 at 07:29:03 | ||
Posts: 19
Location: Dallas, TX Joined: September 17, 2015 |
I have a pair of 4 month old MMGs and one has a strange problem, or it may just be a blown tweeter. On the problem MMG the tweeter doesn't play and all the high frequencies are coming out of the bass panel as though the bass panel has no low pass filter. On the good MMG if I pull the fuse, the bass panel definitely has a low pass filter, no high frequencies there. Before I ship this thing off to Magnepan I'd love to look at the crossover and see how this thing is wired. Any help is greatly appreciated. Thanks Jim |
RE: Maybe a solution, posted on January 21, 2016 at 17:48:21 | |
Posts: 4841
Location: Virginia Joined: February 21, 2002 Contributor Since: December 2, 2004 |
You are right about pulling the fuse (or the attenuator jumper). Back to the drawing board :<. You may be able to see enough with just opening up the back panel without removing the socks. Good luck and let me know if you get a solution. There are several freeware function generators that you can use to play a specific sine (square, triangle, etc) wave to test the speakers. Click here to download a very basic app from Phil Marchand . I recently found a program from Daqarta that does all sorts of things for audio testing. If my theory had been correct the tweeter would play ok around 1000 hz but would drop off significantly at higher and lower frequencies. "Our head is round in order to allow our thoughts to change direction." Francis Picabia |
RE: New MMGs, Burned Tweeter? - Crossover Schematic or Picture?, posted on February 15, 2016 at 18:41:25 | |
Posts: 19
Location: Dallas, TX Joined: September 17, 2015 |
And, the inductors are .86. |
RE: New MMGs, Burned Tweeter? - Crossover Schematic or Picture?, posted on February 16, 2016 at 08:28:50 | |
Ah. Another considerable change from the previous version. Dave. |
Thanks (nt), posted on February 17, 2016 at 11:14:05 | |
Posts: 5426
Joined: July 6, 2002 |
nt |