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Maggie MG-1Improved

B

BernieH

New Member
So, picked up some MG1 improved at an estate sale maybe 18 months ago. Used them as my primary sounded quite good. Maybe 4 months ago they really degraded so I figured I would need to re-wire, took one apart, they actually look great inside Mylar is solid very very little greenish corrosion, (2 places where the low end wire is out of the grove, no breaks) they must have already been done.

that said, they do sound bad nothing like they should. Does have what I believe is the original 20uF capacitor... I played an audio frequency sweep from iTunes, completely shuts down around 8300hz nothing after.

I could clip the capacitor out and test it but a bit confused...I believe the low pass/ high pass is around 1600 - first order. Wouldn’t the freq cut out considerably sooner if the high end had nothing?

Appreciate thoughts on what I am missing. b
 
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Btw, I have not taken the other apart but it cuts out as well....maybe a couple hundred he earlier, my NHTs, KLH model 5s, and DQ10s all sound great same amp same connection
 
They could benefit from a recap. Are you 100% sure the tweeter wires were replaced? One tiny break will do it, and can be very hard to find.
Post some pics when you can.
 
I have a pair of those Magneplanar MGI Imp (bought new in 1980). Replaced the tweeter wire on both about 20 years ago. Its really hard to tell if there are breaks in the tweeter wire visually as a tiny almost invisible discontinuity will do the job. You could do a continuity check with a meter. The tweeter wire is not hard to replace but it is a tedious job. (other than removing the million staples that hold the sock in place) and Magneplanar may still offer the repair kit I used 20 years ago. Give them a call - they didn't use to do email don't know if that has changed. If both speakers have the same problem I would suspect the tweeter wires rather than the crossover capacitors. One final thought - you did check the fuses right? visual inspection is not good enough check them for electrical continuity.
 
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