The 6s were always fantastic VFM, positioned right on the right stands they're great little speakers.Quote:
Originally Posted by YNWaN
Don't be tempted to re-foam without shimming the cones central.
regards Al
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The 6s were always fantastic VFM, positioned right on the right stands they're great little speakers.Quote:
Originally Posted by YNWaN
Don't be tempted to re-foam without shimming the cones central.
regards Al
Really? I was hoping to get away without doing that.Quote:
Don't be tempted to re-foam without shimming the cones central.
I did a pair of AR6 using the same method and it came out looking original and sounded fantastic, i didn't re-center the flat dust cover and no issues with rubbing voice coil, i took extreme care when gluing and pegging as not to twist the assembly, i think it was made easier as the AR's had heavy paper pulp cones and the flat dust cap was the same. :cool:
Food for thought Mark.
wii.
I was scared of cutting that central dome, but I watched several videos on youtube and on the foam ring manufacturers site, some videos were guys just taking pot luck and hoping the end result would be ok. I read up on the subject and the serious guys all insisted on shimming the cones central
.
I can only agree with them, in the first photo you see the cone is detached from the metal basket and you could hear the voice coils scraping the sides, so I shimmed and I'm glad I did,but make sure you blow out or suck out any dusty debris before you glue that dust cap back or scraping may occur.
In the last picture the finished drivers are sat flat, gently pushing them in and out revealed no contact noise at all.
Because I like to do things to the best of my ability the pair of driver repairs took me 3 days with glue drying time and pedantically removing the old foam and glue.
I'm glad I did, they now sound fantastic, good luck if you are doing it.
regards Al
I have access to a frequency generator so I might just glue the roll surround to the cone and then peg it it to the basket and run some swept tones to make sure the coil isn't rubbing.
A few days ago, I ordered a set of foam rings for a pair of 6.5" mid-range drivers. I'll be attempting the fitting of them without removing the dust cap. So I'll let folks know how I get on in a few days when they arrive & I've had a crack at the job.
The speakers are a big pair of Acoustic Research stand mounters - AR 44BX's.
Well, I've just completed the re-foaming of the Allison VI drivers I have. It all went pretty easily really - the only tricky bit is the rather arduous job of cleaning up the edge of the cone and the driver basket. Then apply the glue to the edge of the cone and glue on the edge of the new roll-surround. Use a load of pegs to hold the roll-surround to the driver frame and test with tones from a frequency generator (to confirm everything is OK) - then gradually glue the roll surround to the basket. The end result looks as good as new.
Well done YNWaN,
I love the Allison 6s, they were always great value for money, I hope your repair puts them back on form.
regards Al