Tired 2205A ?

[imtkjlu]

I read in another thread

"loaded with 2205J drivers that are very tired and in the need of recone."

I have two 2205A and my qustion is how do I know if my 2205A
are "tired and need recone." ?

I think they are OK but I have nothing to compare with.
Did they sound "better" 30 years ago ?


///Kjelle

[Rolf]

I read in another thread

"loaded with 2205J drivers that are very tired and in the need of recone."

I have two 2205A and my qustion is how do I know if my 2205A
are "tired and need recone." ?

I think they are OK but I have nothing to compare with.
Did they sound "better" 30 years ago ?


///Kjelle

Hello from Norway.

I have never had the 2205A myself, but it is a Alnico driver, and it might need a re-magnetazion if it has been played "hard" over the years. My 2231A's in the 4333A's needed that. The way I found out was if I was listening to music with a lot of bass power, and the woofer would "crack" at levels it should not do. After the job was done it worked fine again. I do not think a re-cone is neccaserry if they mowe fine without any strange noises.

Those who are more tecknical here may know more.

Rolf

[edgewound]

Usually, a "tired" speaker will show signs of hard use by a sagging spider...stretched out of shape by repeated long excursions so the voice coil is no longer seated in the gap properly. Another sign is a star-like flex pattern or folding around the perimeter of the cone near the compliance or surround. this shows cone fatigue. The only remedy is to have it updated with a 2225 recone kit. Sometimes an alnico magnet can lose it's strength by repeated overheating and or being dropped. The magnet can be recharged bt the factory or a shop with the necessary equipment. When a speaker(transducer, driver,etc.) is properly serviced, it will perform just as well as if it were new.

[imtkjlu]

Here is pictures of my 2205A.
I think they are in very god shape and sound great.
But I can't stop thinking "have they degraded"
Can they sound even better!

[morbo!]

Do metal objects fly toward them???
I dont know how much charge they supposed to have.
But the only thing i would do to the actuall driver by the look of the photo is a recharge if a shifter wont stick to it
p.s cant examine the spider but the cones are in good shape

maybe ill get in all kind of shit for this!

But if u want to blacken the cones
wait for a warm day
pva(wood working) glue 40% hot water 60 % or 50%-50% will do
keep mixing through the process
take a cloth a dip it in your water glue mix and go around in circle`s 1 direction till the cone wet,then set it out to dry
the theory goes
that the cardboard takes on the pvc the water resets the cone and dryes off leaving the cone stiffer
i do it ot all my drivers and it makes them look like new
and never had a prob no matter how much i crank them
morbo!

[jbl]

Is there a noticable difference between the two? As stated above Alnico magnets will lose their charge if worked hard or dropped. Were your 2205s used for home Hi-Fi or live sound applications? You'll need to know their history.
on

[imtkjlu]

Do metal objects fly toward them???
I dont know how much charge they supposed to have.
But the only thing i would do to the actuall driver by the look of the photo is a recharge if a shifter wont stick to it
p.s cant examine the spider but the cones are in good shape

maybe ill get in all kind of shit for this!

But if u want to blacken the cones
wait for a warm day
pva(wood working) glue 40% hot water 60 % or 50%-50% will do
keep mixing through the process
take a cloth a dip it in your water glue mix and go around in circle`s 1 direction till the cone wet,then set it out to dry
the theory goes
that the cardboard takes on the pvc the water resets the cone and dryes off leaving the cone stiffer
i do it ot all my drivers and it makes them look like new
and never had a prob no matter how much i crank them
morbo!

Please explain, what is pva ?
And where do I find it (in Sweden) ?
Cheers
///Kjelle

[Rudy Kleimann]

Do metal objects fly toward them???
I dont know how much charge they supposed to have.
But the only thing i would do to the actuall driver by the look of the photo is a recharge if a shifter wont stick to it

maybe ill get in all kind of shit for this!

Unlike Ceramic/Ferrite magnets, Alnico magnets have very little "stray" magnetism and do not hardly attract ferrous metal to them even when they are newly charged. So this would hardly indicate a weak magnet.

[boputnam]

...an alnico magnet can lose it's strength...

Don't forget to refer readers to the The Great Alnico / Ferrite Debate thread. It's all there.