How to get inside to repair these speakers?

Archived from groups: rec.audio.tech (More info?)

On Sat, 12 Jun 2004 01:49:40 +0200, François Yves Le Gal
<flegal@aingeal.com> wrote:
>On Fri, 11 Jun 2004 23:20:57 GMT, gmc@intlog.demon.co.uk (gmc) wrote:
>
>>Any clues??
>
>If I do remeber correctly, the mid-bass unit uses a form of bayonet on it's
>exterior flange. Don't remeber the specifics for this model, but you could
>try to turn the driver by gently applying presure to the basket.
>
>

Hey François - yup, that's the one!

On the edge of the speaker chassis there are four notches that I was
staring at & wondering if that was the clue...

After yr post, I took a large screwdriver to one of them & applied a
bit of pressure - whoo - it came free, bayonet-style - exactly as you
described...

Merci Bien!!

Archived from groups: rec.audio.tech (More info?)

gmc@intlog.demon.co.uk (gmc) wrote:

: On Sat, 12 Jun 2004 01:49:40 +0200, François Yves Le Gal
: <flegal@aingeal.com> wrote:
: >On Fri, 11 Jun 2004 23:20:57 GMT, gmc@intlog.demon.co.uk (gmc) wrote:
: >
: >>Any clues??
: >
: >If I do remeber correctly, the mid-bass unit uses a form of bayonet on it's
: >exterior flange. Don't remeber the specifics for this model, but you could
: >try to turn the driver by gently applying presure to the basket.
: >
: >
:
: Hey François - yup, that's the one!
:
: On the edge of the speaker chassis there are four notches that I was
: staring at & wondering if that was the clue...
:
: After yr post, I took a large screwdriver to one of them & applied a
: bit of pressure - whoo - it came free, bayonet-style - exactly as you
: described...
:
: Merci Bien!!

They used a specific custom tool for these, - I can't remember whether it
engaged 2 slots or all 4 at once - but you'd probably be best to use 2
screwdrivers, opposite, at once, to re-engage it when you put it back!

The tweeter originally had a plastic cover that fitted between the dome and
the flange, making it flush and covering its screws.

Archived from groups: rec.audio.tech (More info?)

On Sun, 13 Jun 2004 10:57:48 +1200, RdM <rdm@orcon.net.zn> wrote:
>Per Stromgren <per.stromgren@telia.com> wrote:
>
>: On Fri, 11 Jun 2004 23:20:57 GMT, gmc@intlog.demon.co.uk (gmc) wrote:
>:
>: >Hi,
>: >
>: >I have inherited a pair of Wharfedale 507.2 speakers that work &
>: >sound OK, but only give out v. low volume - suspect something in
>: >crossovers may be blown - (but umm.. other possibilities?)...
>:
>: Is both channels faulty the same way? If that is the case I suspect
>: you are looking in the wrong direction. The speaker crossovers would
>: not likely be broken at the same time, with the same symptoms.
>:
>: Try another speaker of the same kind before you dismantle the
>: Wharfedales.
>
>I'd tend to agree - or at least, try a "known good" pair of speakers.
>The 507.2's were rated at 90dB, 8 ohms, 100W power handling.
>OTOH, they had fairly simple crossovers - easy enough to check out.

Thx guys, - it turned out that both tweeters in the Wharfedales were
blown - but bass drivers seem ok - can't check Xovers at moment (yeah,
are simple - 2 inductors & a cap) - but no test equipment at home -
yeah will examine the chain back - maybe there is something up with
amp/CD player/connections etc..

Best,