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#1
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How to get inside to repair these speakers?
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?)... Thing is, howdya get inside these things? - the tweeter has 3 screws on front - OK, can get that out, but the bass unit seems to fit without evidence of any fittings- feeling inside the tweeter hole for bolts etc around the bass driver doesn't get me anywhere, & the (glued-down) rubber cone surround doesn't *seem* to hide screws/bolts underneath... The cabinet itself seems also to be factory glued all round - the back/front panels don't unscrew to allow access... Any clues?? |
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#2
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How to get inside to repair these speakers?
On Sat, 12 Jun 2004 01:49:40 +0200, François Yves Le Gal
wrote: On Fri, 11 Jun 2004 23:20:57 GMT, (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!! |
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#3
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How to get inside to repair these speakers?
On Sat, 12 Jun 2004 01:49:40 +0200, François Yves Le Gal
wrote: On Fri, 11 Jun 2004 23:20:57 GMT, (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!! |
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#4
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How to get inside to repair these speakers?
On Sat, 12 Jun 2004 01:49:40 +0200, François Yves Le Gal
wrote: On Fri, 11 Jun 2004 23:20:57 GMT, (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!! |
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#6
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How to get inside to repair these speakers?
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#7
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How to get inside to repair these speakers?
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#9
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How to get inside to repair these speakers?
(gmc) wrote:
: On Sat, 12 Jun 2004 01:49:40 +0200, François Yves Le Gal : wrote: : On Fri, 11 Jun 2004 23:20:57 GMT, (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. |
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#10
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How to get inside to repair these speakers?
(gmc) wrote:
: On Sat, 12 Jun 2004 01:49:40 +0200, François Yves Le Gal : wrote: : On Fri, 11 Jun 2004 23:20:57 GMT, (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. |
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#11
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How to get inside to repair these speakers?
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#12
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How to get inside to repair these speakers?
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#13
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How to get inside to repair these speakers?
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#14
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How to get inside to repair these speakers?
On Sun, 13 Jun 2004 10:57:48 +1200, RdM wrote:
Per Stromgren wrote: : On Fri, 11 Jun 2004 23:20:57 GMT, (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, |
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#15
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How to get inside to repair these speakers?
On Sun, 13 Jun 2004 10:57:48 +1200, RdM wrote:
Per Stromgren wrote: : On Fri, 11 Jun 2004 23:20:57 GMT, (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, |
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#16
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How to get inside to repair these speakers?
On Sun, 13 Jun 2004 10:57:48 +1200, RdM wrote:
Per Stromgren wrote: : On Fri, 11 Jun 2004 23:20:57 GMT, (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, |
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