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The Advent Loudspeaker project

visiman

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Hello, This is my first entry in the forum, so please don't be too hard on me :D
I need a little advice and what better way to get it than here. So, here is the story. I was given this pair of Advents from my best friend oh, about 15 years ago and had them hooked up in my bedroom. When moving out (1999) I turned up the volume and heard that something was wrong, yes the foam surrounds were shot:uzi: Great! So I stuck them in what I thought was a cool dry place. Then two years ago I dug them out, checked em out, ordered a refoam kit tucked them away and waited. A year later I got the refoam kit wich was sponsored by the original owner of the speakers (how nice!) pulled them back out and wanted to get to work. And looking closer saw that the masonite rings were warped from moisture. Ahhhh (I really should have taken Tom Pettys advice) Now that has been over 6 months ago, and after stashing them away again I pulled them back out. So, here's the deal. I am going to try to get them up and thumping The masonite rings are shot and will be replaced with aluminum rings :thmbsp: As I read (I believe here in AudioKarma) that the rings are just chassis extensions. I really don't want to remove the dust caps because they are in such nice condition and I don't know what I should glue first, the Ring to the chassis, or foam ring to the aluminum ring and then to the chassis??? chassis, The back side of the ring has been roughed and the edges are all smooth. Any Idea's? And yes I painted the chassis
 

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OK, (chill out mode on)

I took the warped masonite ring with me to work and a co-worker measured it and made a plan, e-mailed it off last Thursday and I got it today! It is a perfect aluminum replica. And best of all free!
 

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Slick job on that aluminum ring, refoaming an Advent is easy peasy, you might want to get a cd with a 30 hz tone to center the voice coil. Welcome to AK!
 
Thanks barredowl

I grew up in Temperance Michigan!! and I really miss the lakes in the summer.

So what should I do first? I refoamed a pair of bose speakers and they turned out perfect, but with the gluing surface on the reverse side of the chassis really has me boggled. Normally the masonite ring isn't removed (from what I have read) I am making a glue check right now to see if I get a good contact with the aluminum surface. It will take over night for sure.
 
I recently refoamed a pair of Large Advents and I give you some info on what I went through. It was my first refoam and it went very smooth. I was very happy and surprised on how smooth it went. Keep in mind; which I didn't, that the foam surround ring on the Advent was originaly inverted, meaning the "groove" should be an inny not an outy. Secondly, it's not so much that you are replaceing the dust cap, but you need to remove it and use shims to stabilize the cone while the glue is applied and dries. It is very easy and you will be glad that you did it. Good Luck
 
I really did not want to remove the dust caps to do the refoaming but after reading "dstroyrs" post and thinking about it again I decided to go for it!
Pretty tedious work it was, trying to save the caps. I was a little to ambunctious and learned rather quickly that I should wait longer for the adhesive remover to do its job. I used "Zestron HC" (SMT adhesive remover that leaves no residue) That we'll see!.. But it is a great spray. I took the caps completely off, cleaned them up and they look real good. Needless to say after putting the shims I put the woofers back in a box to dry :-) (They should'nt get too much sun after being in the dark for so long!!) And to show how happy I am I also attached a picture. Yes and yesterday evening I cooked myself a couple of Fried Eggs! (Picture included) I downloaded the "JBL L96 Re-veneer" post from Mike Chadvel and when the speakers pass the test that will be the next step. But first the woofers have to be restored and well, "Poifect!!" The glue that I tested will work great for adhesing the foam ring to the Aluminum ring and the aluminum ring to the chassis. It is solvent FREE. (Don't want to eat up the new rings) and dries plyable.
 

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Good deal on the aluminum in place of the masonite. That is an excellent idea. Those are gonna look good when done. You probably did not need to remove the caps. The 30 hz test tone works great, and so does using a "d" cell battery (1.5 volts) to move the cone in and out (forward and reverse polarity). But, that adhesive remover looks like it did a good job.

Looking forward to seeing how it turns out. Good luck with it. Your buddy who made the replacement rings could sell them. He should probably make some more and $ell them. YD
 
Thanks Yankee Dog!
I'm Looking to have at least one speaker done before Monday. It all depends on the weather.

Just noted that my smiley is missing?
 

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You could make replacement masonite rings very easily to keep the originality, but that's a matter of choice. The important thing is to put the correct 17mm roll thin surround on those woofers. Advent woofers are very forgiving and I have never found it necessary to cut the dust cap to shim. There is a "trick" to refoaming them which makes the job a piece of cake. Do a search and you will find it.
 
This is the best and easiest way to refoam masonite ringed large Advents:
Place thin bead of glue on top of cone or backside of inner surround lip. Place surround on cone inverted (roll down) for masonite ringed woofers. Press cone to surround and let dry for 10 minutes or until tacky. Then press and let dry for about an hour. Put bead of glue on topside of outer lip of surround and press cone to bottom of it's travel. Surround should fall into place on bottomside of masonite ring. Flip woofer over, press outer surround to bottom of masonite ring and let stand until tacky. Then press together and you're done. I let the whole thing dry overnight befre I reinstall woofers.
 
Archie's got it!

That's exactly the way I refoam Advent woofers.

All this cutting out the dust caps and shimming and using test tones is for the birds.

Not necessary with these woofers.

Doug
 
Thanks Archie2

Well It's too late to leave them on. It was not an easy task getting them off.
It is such a nice rainy day here I got both speakers finished and now they are drying. Yesterday I had to help my son with his project. A room divider. Here are two pics. He'll be using A older Pioneer D1s with Quadrals (In Divider) and a 5.1 Magnat surround system. I think He did a good job so far! The TV will sit flush on the wall when finished.
 

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I work in a metal shop and think your new style spacers are a great idea. They look awesome which sure helps!
 
I think they look cool as well, they look something like a JBL LE-14 which has a front lip of aluminum that extends from the cast basket.
 
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