It will be at this time that you realize that the source of the sound appears to be coming from out past the back wall - somewhere between 8 and 50 feet past it, in fact, depending on your room dimensions and where you placed the 901s. Dec 22, 2008 Bose 901s series 1-6 are all wired in the same way. There are other kits available elsewhere for less but I know and trust Parts Express having ordered many times from them in the past. Posted on Jul 08, 2008 bose 901 are great but misunderstood speakers. To get rid of this I took a block sander and sanded it down to remove all that. Over the years, vintage audio components can begin to fail due to the age of their electronics.
Only the center part of the foam is glued at this point. I also need to straighten bullets bass reflexm but I see how is this possible to finish. After that I hot glued the trim ring in place which also helped secure the fabric around the ring as well. We are also looking for any opportunity to exchange both server access and service manuals and anyone interested can contact us. Need to cut circles from front part of boz and remove bullets to be repaired back to their original shape. First driver was a little rough until I got my routine down but then it was smooth to the end.
Before doing so, I took several pictures. I then pressed the port hole trim through, checked for wrinkles, and trimmed up the excess fabric. Though about 2 years ago he had to sell them. Aug 31, 2010 You want them to be your Main Front speakers, right? Jan 17, 2011 Only a careful experiment with steadily increasing volume would reveal the answer. Would the foam surround, if rotten and fallen off of the drivers completely, cause this type of failure? Wash out the old surround material with acetone.
You did a great job restoring this speakers. I don't recommend anything after the series 2, as the sound just seemed to get progressivly worse to increase efficiency, so that smaller amps would be needed. Background A friend got sort of a two-for-one deal on some vintage Bose 901 speakers. In those cases, I went with what was soldered to the board. Keeping them on their backs while they dry will help ensure good adhesion. I started by hammering a cheap screw driver under one of the staples to pop it out a little. The 1st two series have no ports.
First thing I did is pull off as much of the rotted foam I could with my hands. I have to work with plastic part as well. I went with the cloth surrounds, which should never need another re-foaming. So you can understand why I wasted no time to pick up such a cheap set of easily restored 901s. I am hoping I can save them. Rather, I alternated between removal and adding. The protect message appears when the current powering an amplifier inside the receiver goes beyond the safety limit or the amplifiers overheat.
They should all match in every respect. Once the bulk was removed I used a razor to cut off as much of the old glued foam as I could, a fresh blade with sharp edge and the right angle and you can strip it off without much issue. Desoldering was the biggest job here. I would like to know how the nine speakers in a bose 901 ser2 speaker are wired up inside. My 901 V is not working at all and surroundings are. Since the wires were short I did the bottom row of speakers first, then flipped the enclosure upside down and did the other row, it saved me a 3rd hand. After I was done gluing I went around and trimmed off all the excess material.
Once the fabric was glued and trimmed I cut an X one of the port hole areas with a sharp razor. This capacitor, though, was the specific one which caused the channel to go out. Looking closer at the drivers the cones, dust-caps, and voice coils all looked to be in great shape, it was just the foam surrounds that were decaying. There is a need to be cautious but a light touch made it very effective. These speakers are a old Series V set. Next I used a small screw driver to scrape the old glue off the basket. I have a set of Bose 901's and I have replaced the Foam edges on eight of the 9 drivers with great success.
Anybody who says they're no good has missed the point. For the first couple components, I was trying to desolder and remove the whole component. The internal wiring was wrong though. And, I got quite good at reading resistor values without needing to cross reference a color chart. But, once I got the hang of it, things moved along quite quickly. Looking for surround kits, I came across your article. Is there a way to separate plastic inner chamber from wooden top and bottom? You can use a soda can and cut several strips out.
I started with the front grill. The board needed to be removed from the enclosure. Then I dusted it with a damp rag then once dry I went over it with compressed air for a nice clean and smooth grill frame. Grill Re-Upholstering: Now that the front and rear frames were prepped they were ready to be reupholstered. If you don't have five square flat reflective walls to bounce the sound off of, they won't work as designed, and won't sound good. I laid the grill down on top of my fabric and cut around it so the fabric stuck out roughly an inch around the parameter of the frame. Bose typically uses some very low impedance that totals to 8-ohms as wired inside.
We have tried utmost care to make sure completeness of manual. Any suggestions would be greatly appreciated. Thats the Truth about the 901. I went over the glue foam on the cone 2 or 3 times taking off progressively more each time, as a paper cone it is extremely delicate so taking your time is preferred. Keep track of the jumpers you remove from the receiver. I really hate working with that stuff, and acoustic fabric is stretchy in all directions, so I decided I would just work my way around with some hot glue. Front with 8 speakers view from the rear : 1 3 5 7 2 4 6 8 Rear speaker is number 9 Row 1: - 1 + - 3 + - 7 + Row 2: - 5 + - 9 + - 2 + Row 3: - 8 + - 6 + - 4 + Posted on Jan 12, 2008 I have a pair of the 901 and the active equalizer but they have been in the closet for 6 years.