Old Large Advents - Fried fried egg tweeter cause/replacement?

[hmartincalle]

My Old Large Advent has a fried fried egg tweeter. Is it caused by electronic components in the box or a pushed in cage that collapsed the cone and caused the wires to contact the speaker material? I was gifted a pair of old large Advent speakers at the end of a local estate sale. The cage on one tweeter was pushed in, collapsing on the tweeter. It looks like the wires made contact with the paper and burned it. Is this what they mean by a fried speaker? Obviously no way to repair it but does anyone know of a reliable source for a replacement? Need I worry about capacitors, resistors, or components inside? I’m new at repair and restoration but confident at DIY projects. Thanks.

 

[avguytx]

Might find one on e b a y from being parted out. Should be a simple single capacitor crossover for the high pass and accessed with the woofer out. Sometimes just age and being over driven. Sometimes pushed in.

 

[Stuart Pedaso]

That's actually a New Advent Loudspeaker (aka NLA). It's tweeter uses ferrofluid -- an important distinction from earlier versions. Advent tweeters were readily found on auctions sites not so long ago. Which may have been partly influenced by a peak in econowave mod activity. They can still be found, if kinda pricey these days.

 

[malden]

Yes, "New Large Advent"

Personally, I would look into replacing both tweeters with something new. I believe these crossed over at 1K which is a lot to expect for a 40 year old paper cone tweeter, or any tweeter.

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[Guido57]

One member on AK has used Peerless "ring radiator" tweeters as replacements for the Advent tweeter and liked the results. These have a low, at least for a tweeter, resonance frequency, a characteristic shared with the Advent tweeter. They also have a similar physical profile to the Advent tweeter. If it were me I would get a authentic Advent tweeter to replace it just to keep the value of the speaker considering it is the bull-nose cabinet.
FYIW I believe the crossover for the NLA is in the area of 1,500hZ.

 

[Doug G.]

New Advents cross over at 1.5 K. Original Advents are 1 K.

Doug

 

[f0427ea]

View attachment 3158136. Is it caused by electronic components in the box or a pushed in cage that collapsed the cone and caused the wires to contact the speaker material? The cage on one tweeter was pushed in, collapsing on the tweeter. It looks like the wires made contact with the paper and burned it.

Looks like that speaker was pushed/run real hard, surprising the tinsel leads didn't give up or voice-coil fry open before the tinsel leads got hot enough to fry the paper cone. Maybe our local speaker expert GordonW will drop in with a more detailed explanation.

Here's a Large Advent woofer that was pushed a bit too hard.

 

[f0427ea]

View attachment 3158136 Need I worry about capacitors, resistors, or components inside?

Best to pull the woofer and have a look see , if anything got real hot/burned.