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Post by Boomzilla on Nov 16, 2013 17:25:42 GMT -5
Apparently my Magnepan 1.6 speakers had shipping damage that I didn't suspect the significance of until this evening. On arrival, the speakers seemed fine & played fine. When I changed the grille socks, I noticed a number of visible cracks in the frames. Since the speakers seemed to play OK, I thought nothing of it. This evening, I noticed one of the speakers leaning slightly FORWARD. The other had its usual "slightly tilted back" appearance. I immediately checked the washers on the bottom of the speaker leaning the wrong way and found that they were properly installed. Then, running my fingers up the back of the grille cloth, I found that there was a "shelf" where the frame had apparently cracked almost completely in two, side-to-side. I immediately disassembled the speakers from their feet and took the stress off the cracked section. So now there are several alternatives that occur to me: 1. I can disassemble the frames completely and attempt to reinforce the original frames (I suspect that this is NOT going to be an option due to the degree of damage). 2. I can order new frames from Magnepan (I've no clue what this might cost, but with the shipping, I suspect it's not an option either) or 3. I can cut some new frames from plywood in the style of these (but significantly less elaborate):  Suggestions? Warnings? Comments? Any constructive help is GREATLY appreciated! Thanks - Boomzilla |
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Post by wiskers on Nov 16, 2013 17:42:32 GMT -5
I can't see the crack from the photo. Is it possible to use a good wood glue and clamp it overnight?
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Post by Boomzilla on Nov 16, 2013 18:10:22 GMT -5
I can't see the crack from the photo. Is it possible to use a good wood glue and clamp it overnight? The photo isn't of my speakers - just of some that I may emulate. I'll strip the socks tomorrow & post a photo of the actual damage. |
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Post by garbulky on Nov 16, 2013 18:13:39 GMT -5
Try to get iluvtubes attention. He used to work for and service maggies and seems to know them very well.
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Post by audiobill on Nov 16, 2013 18:24:20 GMT -5
Apparently my Magnepan 1.6 speakers had shipping damage that I didn't suspect the significance of until this evening. On arrival, the speakers seemed fine & played fine. When I changed the grille socks, I noticed a number of visible cracks in the frames. Since the speakers seemed to play OK, I thought nothing of it. This evening, I noticed one of the speakers leaning slightly FORWARD. The other had its usual "slightly tilted back" appearance. I immediately checked the washers on the bottom of the speaker leaning the wrong way and found that they were properly installed. Then, running my fingers up the back of the grille cloth, I found that there was a "shelf" where the frame had apparently cracked almost completely in two, side-to-side. I immediately disassembled the speakers from their feet and took the stress off the cracked section. So now there are several alternatives that occur to me: 1. I can disassemble the frames completely and attempt to reinforce the original frames (I suspect that this is NOT going to be an option due to the degree of damage). 2. I can order new frames from Magnepan (I've no clue what this might cost, but with the shipping, I suspect it's not an option either) or 3. I can cut some new frames from plywood in the style of these (but significantly less elaborate): Suggestions? Warnings? Comments? Any constructive help is GREATLY appreciated! Thanks - Boomzilla Wood glue and clamp willmake the mdf stronger than new..... |
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Post by Jim on Nov 16, 2013 19:58:09 GMT -5
Wood glue and clamps can work wonders.
Did it happen during shipping or did the DC-1 possibly cause it? ;-)
/ducks
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Post by Boomzilla on Nov 16, 2013 20:12:20 GMT -5
I'm game for wood glue & clamps. Yep - It probably WAS the DC-1 that caused it! LOL  |
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Post by Darksky on Nov 16, 2013 21:00:09 GMT -5
Post some pictures. We will figure it out. If it is outside of your skill set, send the frame to me and I will fix it.
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Post by GreenKiwi on Nov 16, 2013 21:12:23 GMT -5
I'd try wood glue and clamps.
You could use something to create a gusset if you wanted. Maybe a little fiberglass.
Or if you are handy with wood you could make some new frames out of hard wood. Effectively gunn them. People swear by the improvements. And they look really cool with nice hardwood frames.
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Post by GreenKiwi on Nov 17, 2013 0:22:45 GMT -5
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Post by paintedklown on Nov 17, 2013 1:06:33 GMT -5
Don't quote me on this guys, but I believe Peter Gunn will e-mail you the parts list and instructions to do his mod, for free of charge. It doesn't hurt to ask, and even if there is a nominal fee, the mod is supposedly worth doing, if you have the skills to do it. (I don't). Alternately, I do believe he is still doing the mods, just on a smaller scale these days. Good luck Boom.  |
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Post by pedrocols on Nov 17, 2013 2:01:15 GMT -5
Don't quote me on this guys, but I believe Peter Gunn will e-mail you the parts list and instructions to do his mod, for free of charge. It doesn't hurt to ask, and even if there is a nominal fee, the mod is supposedly worth doing, if you have the skills to do it. (I don't). Alternately, I do believe he is still doing the mods, just on a smaller scale these days. Good luck Boom. He will email you the upgrade for the crossover only not the frame. |
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Post by jhanken on Nov 17, 2013 2:20:28 GMT -5
Can't offer advice without detailed pics, but I can offer sincere sympathy. We hates to buy busted speakers, we hates it! I feel a desire in the posts above to rally major forces, please provide good pics and I think the community is gonna come through for you.
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Post by Boomzilla on Nov 17, 2013 10:16:49 GMT -5
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klinemj
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Official Emofest Scribe
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Post by klinemj on Nov 17, 2013 10:47:50 GMT -5
If there were originally not screws, I would not use screws. You might actually damage the frame if you over-tighten them. I would lean toward using adhesive if that appears was what was originally used. Maybe Magnepan would even reco a particular type of adhesive if you called them.
Mark
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Post by Boomzilla on Nov 17, 2013 10:58:32 GMT -5
Thanks, Mark - good idea. In fact the actual speaker "frame" is made of particle board and has the structural integrity of a cereal box. Screws probably wouldn't hold, which is why Magnepan didn't use any. The board doesn't appear to have any adhesive either, so I really don't know what held it originally. The ONLY connection I can see visually is where some plastic ties held the crossover coil to the speaker frame. Both of those plastic ties are now broken, so to start, I'm presuming that I should replace them. There was some tape on the frame that covered the edge of the crossover board, but it didn't seem structural. There probably was some glue on the back of the board that's come loose. A shot of "liquid nails" or even some Elmers' Wood Glue would probably put it back in "original" condition.
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klinemj
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Official Emofest Scribe
Posts: 15,083
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Post by klinemj on Nov 17, 2013 11:37:57 GMT -5
Beware Gorilla Glue....it is strong but it foams and spreads!
Mark
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Post by Darksky on Nov 17, 2013 11:58:25 GMT -5
Boom, what I see is a long crack that runs vertical on one stile at the bottom where the crossover network resides. The crossover is not in a box like the nice wooden speakers in the reference pic. They are more in a hollow space created by one additional thickness of the mdf laid behind the stile and then cut out to make the recess.
I would imagine tha the extra material around the crossovers also provides additional strength for the bases and material where the screws are lagged on for the metal legs.
So, what has happened is the weight of the frame leaning back onto the braced part has caused the stile to fail at the fulcrum just above the crossover "box" and crack longways maybe also separating the glue that is holding the back of the crossover box to the stile.
Sound reasonable?
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Post by Boomzilla on Nov 17, 2013 11:59:53 GMT -5
The boards had originally been secured with a combination of glue & brads. The glue had come loose and the brads had come out. Since I didn't have replacement brads that long (nor a driver to shoot them with), I drilled some pilot holes, and using 9 power screws and some Elmer's wood glue, the board is now back where it belongs. After lunch (after the glue sets), I'll re-staple the socks and be off to the races again. Thanks for the feedback.
Boom
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Post by Darksky on Nov 17, 2013 12:31:53 GMT -5
Things I would recommend, spread the crack open slightly with an awl or ice pick and force the glue down into the crack as deep as possible. Put a tiny drop of glue into each of the pilot holes prior to setting the screws. Even with the screws, I would clamp the heck out of it and give the glue a day to set.
Did the other side show signs of stress? Can you add a long thin strip of hardwood along the back to reinforce it?
It sounds like you have a good handle on it. Post pics when you are done.
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