NrT Upgrade instructions with video!

[GirgleMirt]

Well first of all, Merry Christmas to all!

For the original Sierra upgrade:

An even simpler option, if you have a soldering iron, is to desolder the two crossover lead wires on the original crossover. Simply apply the hot tip of the soldering iron to the corresponding solder pad on the underside of the crossover network and while the solder has liquefied, pull the wire out from the PCB. You will then reinsert and resolder these same crossover lead wires into the NrT crossover. Using this method, it is not necessary to cut and splice any wires and it makes for a cleaner installation.

I just tried this method, and ran into a peculiar problem... Does the crossover use a special sort of solder? My (crappy) soldering gun seems to be absolutely ineffectual in melting the solder on the bottom of the crossover/wire... In 10s of applying it, it barely did a dent! (And it definitely was at temperature, 'regular' solder melted instantly...) So given that the wires lengths are quite short and force you to work in the restricted space of the cabinet, going through 4 de-solders and 4 solders, just seems much more tedious than going the goo gone way and just unscrewing the binding terminals...

And actually, given the position of the wire behind an inductor on the crossover, which ends up in the rear of the cabinet, I think trying to solder the wire to the new crossover would make unscrewing the crossover with the filling still inside the cabinet look like child play! Actually, it wasn't so bad the 2nd crossover got unscrewed in maybe 5 mins, having a T shaped screwdriver didn't really help... And it is absolutely possible to do the work without destroying the mesh, the glue was applied only about 1/2 of the top of the cabinet, so you can definitely lift it to give yourself enough room to work without destroying everything, and you can definitely raise it to give you access to the binding posts.

Splicing wires inside the cabinet also wouldn't be quite as easy as simply unscrewing binding post and re-screwing them imho...

About that Torx T15 bit, it's the star shaped one:

It pretty much comes standard in those screwdrivers with interchangeable bits, so most probably already have it at home.

[GirgleMirt]

Happy new year!

Another option, which we have done here, is to drip a few drops of "Goo Gone" or a similar solvent onto the posts which breaks up the glue and makes removing the nuts much easier.

Did anyone manage to get the Goo gone to work on the glue of the binding posts?

I've tried to apply it with Q-Tips but it just didn't work very well, Q-Tips just fall apart... And you can't really apply it directly because the bottle won't fit into the speaker... So I just put the speaker facing up and dripped the goo gone on top of the posts, bit messy, but a good layer of goo gone on it.

I applied a layer yesterday, let it sit all night, and this morning checked it, and it seemed to make absolutely no difference Did you need a special Goo Gone? http://www.magicamerican.com/googone/products.aspx They had the Gel one: http://www.magicamerican.com/googone...063ffa1a9.aspx

There was a gunk of glue on top of one binding post, and it wasn't dissolved or anything... Which makes it look to me like this isn't working...

[GirgleMirt]

Happy new year!



Did anyone manage to get the Goo gone to work on the glue of the binding posts?

I've tried to apply it with Q-Tips but it just didn't work very well, Q-Tips just fall apart... And you can't really apply it directly because the bottle won't fit into the speaker... So I just put the speaker facing up and dripped the goo gone on top of the posts, bit messy, but a good layer of goo gone on it.

I applied a layer yesterday, let it sit all night, and this morning checked it, and it seemed to make absolutely no difference Did you need a special Goo Gone? http://www.magicamerican.com/googone/products.aspx They had the Gel one: http://www.magicamerican.com/googone...063ffa1a9.aspx

There was a gunk of glue on top of one binding post, and it wasn't dissolved or anything... Which makes it look to me like this isn't working...

Alright so something like 40 hours later, after a 2nd Goo gone application, seems to have worked! It did dissolve the glue, it isn't entirely gone, but it's definitely weaker, almost the consistency of chewed gum, which made the removal of the 1st binding post screw possible! One down, three to go! Working inside the cabinet makes things quite harder, if the screw was outside, would have been done in 2 minutes, but in the restricted space, just unscrewing a screw isn't that easy... Well, getting the hand of it now

Edit: So one speaker is done! Sounds great! The woofer and tweeter still need some burn in, but compared to another speaker I had on hand, not even close Can't wait to get the 2nd done! But the thing is, since it seemed like the Goo Gone wasn't doing much, I didn't apply it to the 2nd speaker, and so I just gave the 2nd a 2nd spurt of Goo and will have to wait a couple of hours until it does it job...