NLA Advent Crossover Componets

[SG19]

So, any word or news with your rebuilt crossovers for your Advents? Did you finish them and how do they sound?

I'm not in a big rush apparently , I did finish the cabinet repair , also pick up another pair that are the bull nose cabinets , so I have a set of caps that may have come from @East Point via ebay ? Deciding which cabinets get which componets .

The cabinets came out pretty good , using them on my TV system which is an Onkyo TX-8050 receiver , Panisonic UB450 4K blu-ray , LG C-4 , and the Advents . . .

 

[Guido57]

For those who have redone their x-overs, did you do them in situ, or tap out the x- over panel to work on them on a bench?
Looking at eBay NLA crossover panels, I’m assuming the panel is glued somehow to the interior wall of the cabinet….

If I recall correctly the crossover components on the NLA's I've done were glued directly to the back of the cabinet. For the resistors I just cut the leads and glued new ones in place, the old caps I removed. The OLA's I've worked on had the crossovers on a separate Masonite panel. Quite possible Advent used different construction techniques over the production run. Admittedly it has been a while since I've been in an NLA cabinet. I took no pictures and am relying on at least a five year old memory. One thing I can say for certain is that none of the ones I've done had the large inductor nestled against the switch like the one shown in this thread. Do whatever is easiest for your situation.

 

[SG19]

If I recall correctly the crossover components on the NLA's I've done were glued directly to the back of the cabinet. For the resistors I just cut the leads and glued new ones in place, the old caps I removed. The OLA's I've worked on had the crossovers on a separate Masonite panel. Quite possible Advent used different construction techniques over the production run. Admittedly it has been a while since I've been in an NLA cabinet. I took no pictures and am relying on at least a five year old memory. One thing I can say for certain is that none of the ones I've done had the large inductor nestled against the switch like the one shown in this thread. Do whatever is easiest for your situation.

Close up of the cross over , this is how they arrived to me .

 

[Guido57]

Close up of the cross over , this is how they arrived to me .

View attachment 3830377

As I said, it is possible, probably likely, that Advent changed production techniques over the course of production. If I had to wager on it I would guess the panel is held on by the same hot glue holding the components to the panel. Hair dryer to soften glue to remove panel. To answer the question from @Mrv8q did you redo the crossovers? If so did you remove the panel or work in situ? If I wanted to keep the replacements on the panel I'd remove the panel. If I just wanted to change the components I might just remove the old components and glue the new to the back of the cabinet working in situ. Honestly I might not decide which until I opened things up and looked at the situation. Sometimes removing panels that are glue in are a bigger PITA than working through the woofer opening.

 

[SG19]

As I said, it is possible, probably likely, that Advent changed production techniques over the course of production. If I had to wager on it I would guess the panel is held on by the same hot glue holding the components to the panel. Hair dryer to soften glue to remove panel. To answer the question from @Mrv8q did you redo the crossovers? If so did you remove the panel or work in situ? If I wanted to keep the replacements on the panel I'd remove the panel. If I just wanted to change the components I might just remove the old components and glue the new to the back of the cabinet working in situ. Honestly I might not decide which until I opened things up and looked at the situation. Sometimes removing panels that are glue in are a bigger PITA than working through the woofer opening.

Wasn't really disagreeing with you , I've seen a page some where that shows the detail of 3 different crossover arrangements Advent used over the year's , just posting a better image of mine for you and anyone else that my want a closer look.

 

[malden]

Just got home from listening to a friends set of Advents and his sounded better , tighter , cleaner so I do have a direct comparison.

If the source is different, the amplification different and the room different, it is not a direct comparison.

 

[SG19]

If the source is different, the amplification different and the room different, it is not a direct comparison.

Close enough for the girls I go out with.

 

[malden]

Close enough for the girls I go out with.

then why all the fuss over which type of capacitor to use? You think those girls gonna hear a difference?

 

[Midwestmusic]

I ended up removing the crossover from the inside of the speaker. Gently broke loose the hot glue that held the crossover components to the masonite board. Removed the nut from the 3-way switch and the 2 thumbscrews for the positive and negative speaker terminals. From the inside of the speaker, you can use a Phillips set screwdriver and unscrew the positive and negative speaker wire terminals, and now the crossover can be removed.

From there I de-soldered the old crossover from the three-way switch. Cleaned up the switch a little bit with some contact cleaner and then soldered on new parts and put everything back together.

So the masonite board that’s hot glued into place or whatever I left inside of the speaker. I just carefully removed the crossover parts that were glued to the top side of that masonite to get the crossover out to rebuild it.

Funny thing is the original crossover had the two sandcast resistors flip-flopped. Normally when the 3-way switch is set to “Normal“ the 1 Ohm resistor is the one that will be used. When the 3-way switch is set to “Decrease” the 1.5 Ohm resistor is used. They were opposite or flip-flopped. When I rebuilt the crossover, I built it incorrectly because I was looking at the original crossover.

I have no idea if it was built incorrectly from the factory or if a previous owner rebuilt the crossover with identical OEM parts, and they flip-flopped the 2 sandcast resistors. So yeah, I gotta fix that but I figured I would post my mistake anyways, lol.

At the time I purchased the crossover parts I had to get two .5 Ohm to equal 1 Ohm, as seen in the picture. Just in case anyone was wondering.