Allison Bass driver repair

[trio leo]

I was scared of doing this repair for about 2 years, why I don't know they were knackered any way, what did I have to lose, so I bought the repair kit and this is how I did it.
this is what they looked like when I started


I made a cone support from a piece of hose pipe


then I used thinners to clean the metal basket and very carefully the edge of the cone, I used a craft knife and cotton bud




next I used a small blade craft knife to cut the central dustcap(scary bit) note the angle of the knife is parallel to the cone to avoid cutting the fine wire beneath.




I then used thin strips of plastic coated paper as shims to centralise the cone before glueing the new foam to the cone




after the glue had dried I then glued the foam to the metal basket with a soft brush


clothes pegs as clamps, taking that the shims centralised the cone I glued the foam to the basket where it lay, I didn't try to centralise that as well.


I used a piece of blutak to lower the dome exactly where it came from, as the cut was a bit wobbbly it was easy to line up where it came from.


I used a small file to weigh it down gently whilst the glue dried


and Voila! the finished Item, once the glue dried they look quite good I thought


back in the Allison 3 cabinet yahoooooo



I hope it has been helpful to anyone wanting to have a go, I missed out on 2 years of my favourite speakers now they are back sounding beautiful.
good luck

regards Al