F Frugal Junior Audioholic Jan 25, 2006 65 0 8 Northern Alberta Feb 27, 2019 #1 A friend told me that he thought he may have blown his speaker. This is what I found under the grill. Never seen this before! Pioneer SC 67 running one pair of KEF Q150. Not looking for advice, just wanted to share.
A friend told me that he thought he may have blown his speaker. This is what I found under the grill. Never seen this before! Pioneer SC 67 running one pair of KEF Q150. Not looking for advice, just wanted to share.
Phase 2 Audioholic Chief Dec 30, 2018 932 0 63 Feb 27, 2019 #2 Damm the bad luck! Reactions: killdozzer
B Beave Audioholic Chief Nov 23, 2015 791 0 43 Feb 27, 2019 #3 Looks like Q100s, not Q150s. I've seen a few (maybe 2 or 3) pics online before of people doing that to their Q100s or Q300s when overdriving the midwoofer.
Looks like Q100s, not Q150s. I've seen a few (maybe 2 or 3) pics online before of people doing that to their Q100s or Q300s when overdriving the midwoofer.
davidscott Audioholic Spartan Aug 9, 2018 5,518 0 83 Feb 27, 2019 #4 Wow never saw anything like that before without some actual physical damage to the driver.
R Russdawg1 Full Audioholic Nov 21, 2018 402 0 28 Feb 27, 2019 #5 Are you sure your friend didn’t blow them by stabbing them with a knife instead? I’ve never seen a cone explode like that. Usually a “blown” woofer means the voice coil has been fried or separated from the rest of the woofer
Are you sure your friend didn’t blow them by stabbing them with a knife instead? I’ve never seen a cone explode like that. Usually a “blown” woofer means the voice coil has been fried or separated from the rest of the woofer
B Beave Audioholic Chief Nov 23, 2015 791 0 43 Feb 28, 2019 #6 Do a Google image search and you'll see a couple of other KEFs with very similar damage. When that thin aluminum cone exceeds its 'safe' range of motion, it bends and cracks. Reactions: killdozzer
Do a Google image search and you'll see a couple of other KEFs with very similar damage. When that thin aluminum cone exceeds its 'safe' range of motion, it bends and cracks.
killdozzer Audioholic Samurai Feb 5, 2014 2,419 0 83 Feb 28, 2019 #7 Hurts my eyes and soul. Such waste...
ryanosaur Audioholic Overlord Sep 14, 2018 11,686 0 113 Feb 28, 2019 #8 Wow. Strangely fascinated by this. On one hand, I feel for your friend. My KEF audition was cool... great sounding speakers. Wouldn't wish that on anybody. On the other hand, the part of me that got listening fatigue during that same audition is jumping with glee. My guess is the speaker was suicidal for being put on its side in a cabinet. That should be a crime.
Wow. Strangely fascinated by this. On one hand, I feel for your friend. My KEF audition was cool... great sounding speakers. Wouldn't wish that on anybody. On the other hand, the part of me that got listening fatigue during that same audition is jumping with glee. My guess is the speaker was suicidal for being put on its side in a cabinet. That should be a crime.
I ichigo Full Audioholic Feb 22, 2006 319 0 28 Mar 1, 2019 #9 Looks scary...I think I'll stick to 3 way coaxial with a sub to avoid this...
tyhjaarpa Audioholic Field Marshall Sep 9, 2014 1,892 0 63 Finland Mar 1, 2019 #10 Russdawg1 said: Are you sure your friend didn’t blow them by stabbing them with a knife instead? I’ve never seen a cone explode like that. Usually a “blown” woofer means the voice coil has been fried or separated from the rest of the woofer Click to expand... These are not typical speaker elements as they have basicly two elements in one. I would assume he has blasted those speakers really loud and possibly over driven amp to cause massive clipping.
Russdawg1 said: Are you sure your friend didn’t blow them by stabbing them with a knife instead? I’ve never seen a cone explode like that. Usually a “blown” woofer means the voice coil has been fried or separated from the rest of the woofer Click to expand... These are not typical speaker elements as they have basicly two elements in one. I would assume he has blasted those speakers really loud and possibly over driven amp to cause massive clipping.
Kvn_Walker Audioholic Field Marshall Jun 4, 2018 1,600 0 63 Mar 1, 2019 #11 Looks like he bought the wrong tool for the job. Must have been playing them very loud and possibly full range to boot (or crossed over lower than a 5" speaker should ever be).
Looks like he bought the wrong tool for the job. Must have been playing them very loud and possibly full range to boot (or crossed over lower than a 5" speaker should ever be).
E <eargiant Senior Audioholic May 3, 2016 525 0 43 Mar 1, 2019 #12 Doesn't surprise me. Even my LS50 which I assume have better drivers couldn't take a clean full range signal at anything approaching ~90dB in a small room. Thap, thap, thap.
Doesn't surprise me. Even my LS50 which I assume have better drivers couldn't take a clean full range signal at anything approaching ~90dB in a small room. Thap, thap, thap.
K KenM10759 Audioholic Ninja Oct 8, 2015 3,058 0 113 Spencer MA, USA Mar 2, 2019 #13 Was that 90dB measured from a listening position or the standard 1 meter? My LS50's don't have any distortion like that at -90dB from my 1 meter away listening position.
Was that 90dB measured from a listening position or the standard 1 meter? My LS50's don't have any distortion like that at -90dB from my 1 meter away listening position.
E <eargiant Senior Audioholic May 3, 2016 525 0 43 Mar 2, 2019 #14 KenM10759 said: Was that 90dB measured from a listening position or the standard 1 meter? My LS50's don't have any distortion like that at -90dB from my 1 meter away listening position. Click to expand... From the listening position ~ 8' away. I discussed my experience in the thread linked below starting on post #46. https://forums.audioholics.com/forums/threads/legacy-studio-hd-vs-kef-ls50.111132/page-3
KenM10759 said: Was that 90dB measured from a listening position or the standard 1 meter? My LS50's don't have any distortion like that at -90dB from my 1 meter away listening position. Click to expand... From the listening position ~ 8' away. I discussed my experience in the thread linked below starting on post #46. https://forums.audioholics.com/forums/threads/legacy-studio-hd-vs-kef-ls50.111132/page-3
GrimSurfer Senior Audioholic Feb 12, 2019 654 0 43 Mar 2, 2019 #15 LOL. So that's what they mean by "sound breaking up" at the edge of a cone! For aluminum to fracture like that means that it is either a special alloy or was heated treated for stiffness (or both).
LOL. So that's what they mean by "sound breaking up" at the edge of a cone! For aluminum to fracture like that means that it is either a special alloy or was heated treated for stiffness (or both).
E <eargiant Senior Audioholic May 3, 2016 525 0 43 Mar 2, 2019 #16 GrimSurfer said: LOL. So that's what they mean by "sound breaking up" at the edge of a cone! For aluminum to fracture like that means that it is either a special alloy or was heated treated for stiffness (or both). Click to expand... If I saw that picture in isolation and not with the background the OP provided I would've never thought that extensive damage like that could have been caused by being overdriven. It actually looks like it incurred extreme physical damage, like getting kicked with a boot . Last edited: Mar 3, 2019
GrimSurfer said: LOL. So that's what they mean by "sound breaking up" at the edge of a cone! For aluminum to fracture like that means that it is either a special alloy or was heated treated for stiffness (or both). Click to expand... If I saw that picture in isolation and not with the background the OP provided I would've never thought that extensive damage like that could have been caused by being overdriven. It actually looks like it incurred extreme physical damage, like getting kicked with a boot .
lovinthehd Audioholic Jedi Sep 11, 2012 44,861 0 113 Oakridge, OR Mar 3, 2019 #17 killdozzer said: Hurts my eyes and soul. Such waste... Click to expand... Didn't you have KEF LS50 cone damage from handling/contact?
killdozzer said: Hurts my eyes and soul. Such waste... Click to expand... Didn't you have KEF LS50 cone damage from handling/contact?
killdozzer Audioholic Samurai Feb 5, 2014 2,419 0 83 Mar 4, 2019 #18 lovinthehd said: Didn't you have KEF LS50 cone damage from handling/contact? Click to expand... Indeed. That's why I relate with the guy. But my damage was almost non-existent. I managed to straighten it out easily. Trying to see something positive in the whole story, I thought to myself; this was the only way to learn just how soft the membranes are. Being used to paper cones, I might have done far more damage just trying to clean them. (remember; the damage was done with a slightest of flicks of my hand holding a glasses cleaning cloth in an attempt to dust them of - one uncontrolled flick and I touched the membrane). I said back then; I appreciate these boxes, but they would HAVE TO include a warning about these Al/Mg membranes. They bend if you look at them angrily. Or at least a warning that these are not suited for the households with small children. Remember, they are being produced with no grills. Perhaps it's KEF trying to get us addicted to these cool little players so that we come back for more when we inevitably dent them. And dent them we will...
lovinthehd said: Didn't you have KEF LS50 cone damage from handling/contact? Click to expand... Indeed. That's why I relate with the guy. But my damage was almost non-existent. I managed to straighten it out easily. Trying to see something positive in the whole story, I thought to myself; this was the only way to learn just how soft the membranes are. Being used to paper cones, I might have done far more damage just trying to clean them. (remember; the damage was done with a slightest of flicks of my hand holding a glasses cleaning cloth in an attempt to dust them of - one uncontrolled flick and I touched the membrane). I said back then; I appreciate these boxes, but they would HAVE TO include a warning about these Al/Mg membranes. They bend if you look at them angrily. Or at least a warning that these are not suited for the households with small children. Remember, they are being produced with no grills. Perhaps it's KEF trying to get us addicted to these cool little players so that we come back for more when we inevitably dent them. And dent them we will...
B bcycle Junior Audioholic Aug 17, 2005 68 0 6 Philly Dec 13, 2024 #19 Frugal said: A friend told me that he thought he may have blown his speaker. This is what I found under the grill. Never seen this before! Pioneer SC 67 running one pair of KEF Q150. Not looking for advice, just wanted to share.View attachment 28432 Click to expand... I just bought a pair. I’m not worried because I don’t f*ck up like this. Owner of those KEF’s messed up; touched a wire to somethin; sent a pulse somehow.
Frugal said: A friend told me that he thought he may have blown his speaker. This is what I found under the grill. Never seen this before! Pioneer SC 67 running one pair of KEF Q150. Not looking for advice, just wanted to share.View attachment 28432 Click to expand... I just bought a pair. I’m not worried because I don’t f*ck up like this. Owner of those KEF’s messed up; touched a wire to somethin; sent a pulse somehow.
everettT Audioholic Spartan Apr 7, 2016 5,695 0 113 61 Dec 13, 2024 #20 bcycle said: I just bought a pair. I’m not worried because I don’t f*ck up like this. Owner of those KEF’s messed up; touched a wire to somethin; sent a pulse somehow. Click to expand... That isn't normal at all, it shouldn't be a concern Reactions: KenM10759
bcycle said: I just bought a pair. I’m not worried because I don’t f*ck up like this. Owner of those KEF’s messed up; touched a wire to somethin; sent a pulse somehow. Click to expand... That isn't normal at all, it shouldn't be a concern
