Re-foaming Bose 901's

[BCbud]

First try didnt work, pictures where too big. I hope my camara has a low enough resolution to allow me to post more pictures of the rebuild.

[BCbud]

Good day!

I have not received my foam repair kit yet but decided to try and get the front grill off one of the speakers. This is not too hard to do once you find the info on how to do it ( took me half a day to find the info ) The grills are fastend with 8 small staples seen in one of the pics. You take a dinner knife and pry the grill from the top center and work it to one side or the other and the corner staple will come out of the box or out of the grill. It dosnt matter as you do not see anything from the front of thr grill. Once one corner becomes free, you work your way around the edges with your hands and finaly the center. The staples are placed in each corner, left and right side midway from top to bottom and 2 in the center. One above and one below the driver. I removed the 3 fasteners and lifted the driver out. The wires are quite short and are a solid core type of wire. I was a little surprised to see the light guage of the wire. I may try to upgrade to a heaver guage. The wires are attached to the driver by being wraped aroend 2 pins that are on the driver and no solder is used. I have read that soldering is recomended but must be done with care as the driver basket is plastic and can melt if too mutch heat is used or you take too long trying to solder.Also solder the wires to the speaker terminales. I have marked on the back of the driver what color wire was on whitch pin, the top of the driver as it was mounted and the box it was in. I plan on putting them back in the same holes they came out of.

[BCbud]

One more pic.

[BCbud]

Good day!
I have started the repair. I took some pics of the 2nd front grill removal. It was more stuborn than the first. I had to use a heavy duty putty knife in the end and I did break the wood.

[BCbud]

Once I got the 2nd grill off I removed all the drivers and marked on the back of them whitch box they came out of, what hole in that box and what color wires where conected to each post so I can put them back the same way they were when I started.

[BCbud]

I was suprised to see the drivers in box 2 had 4 different production drivers in the lower 4.Not only the dates stamped on the back are different but the metal backing plates are octigon in shape insted of round. Also one driver had one wire not conected to the pin.

[bfalls]

Are the replacement surrounds foam or rubber? It doesn't make sense to me to go through all the trouble to replace the surrounds with an inferior material. Do any of the surround replacements kits use rubber instead of foam?