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Old 2nd August 2009, 03:59 PM   #1
rhr9 is offline rhr9  France
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Location: Alsace
Default Tweeter for Magnapan MG1 Imp

Hi Folks ,

At this time I' m trying to rebuild my old MG1 Imp .
Unfortunately the wires of the tweeter are broken at several places .
So I would like to know if I can replace it with a conventionnal
tweeter . Its caracteristics should be able to drive low frequencies : the initial crossover High pass was 1600 Hz at 6 db / Oct , a sensitivity of 87 dB and a high power admissibility .

Do you think that such a project makes sence ?
I need your advices .

Best regards ,
@ + Philippe.
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Old 3rd August 2009, 01:02 AM   #2
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Phillipe,

If you wish to restore the speakers, it is possible to replace the wire for the tweeter circuit with new. This is a little tricky, but possible without complex tools. Magnepan can provide repair kits containing the coated Aluminium wire and solder, and other materials such as adhesives you need are easily obtained.

I rebuilt a set of SMGa speakers last year (bass and treble circuits replaced), and the results were very good.

To substitute a different tweeter, you'd probably need to attenuate the signal, as the sensitivity of dome tweeters is often in the 90+dB/W/m range. Of course there are crossover considerations too...

Ed
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Old 3rd August 2009, 03:47 PM   #3
rhr9 is offline rhr9  France
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Hi Ed ,

Thank you for your reply .
I knew about the repair kit , but on MAGNENAN site there is no
email address to contact them .
Do you know how much it costs ? including shipping costs for Europe ?

However , I would like to make a try with a tweeter like the SEAS 27TBFC who's sensivity is about 91.5 dB that I can attenuate with resistors .

@ + Philippe.
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Old 7th August 2009, 09:22 PM   #4
kirk57 is offline kirk57  United States
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Magnepan is not big on e-mail, but you can call them. They are in the Central time zone of the US.

The tweeter kit for the MGIIb that I ordered last spring was $50 plus shipping which was about $10 more. This includes the adhesive. You'd need to buy acetone to remove existing wire/adhesive.

I would think that using a different (i.e. non-planar) tweeter on these would pretty much destroy the sonic signature of the speaker. The low pass to the woofer is at 400Hz, and they are not known for their bass, so what's the point?

Just my $.02

Kirk
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Old 7th August 2009, 09:26 PM   #5
kirk57 is offline kirk57  United States
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Forgot to mention that if you do decide to get the rewire kit from Magnepan, you need to do so before the weather gets cold. The adhesive included in the kit freezes and Magnepan is in Minnesota (cold up there) so they stop shipping the kits in late fall and resume in the spring. Magnepan can tell you specific dates.

Just something to consider....
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Old 7th August 2009, 10:05 PM   #6
kirk57 is offline kirk57  United States
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Magnepan is not big on e-mail, but you can call them. They are in the Central time zone of the US.

The tweeter kit for the MGIIb that I ordered last spring was $50 plus shipping which was about $10 more. This includes the adhesive. You'd need to buy acetone to remove existing wire/adhesive.

I would think that using a different (i.e. non-planar) tweeter on these would pretty much destroy the sonic signature of the speaker. The low pass to the woofer is at 400Hz, and they are not known for their bass, so what's the point?

Just my $.02

Kirk
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Old 8th August 2009, 02:13 AM   #7
kirk57 is offline kirk57  United States
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Join Date: Feb 2008
Magnepan is not big on e-mail, but you can call them. They are in the Central time zone of the US.

The tweeter kit for the MGIIb that I ordered last spring was $50 plus shipping which was about $10 more. This includes the adhesive. You'd need to buy acetone to remove existing wire/adhesive.

I would think that using a different (i.e. non-planar) tweeter on these would pretty much destroy the sonic signature of the speaker. The low pass to the woofer is at 400Hz, and they are not known for their bass, so what's the point?

Just my $.02

Kirk
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