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#2
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JBL LE 14C speakers
TUBELOVER wrote:
i would like to correspond by email or phone with someone knowlegeable about these speakers, as i have acquired a pair but have some questions. Ask in the newsgroup you're in. Don't expect people to want to type for you only. Ron email rg -- ******************************************* * My site is at: http://www.muyiovatki.dk * ******************************************* |
#3
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JBL LE 14C speakers
TUBELOVER wrote:
i would like to correspond by email or phone with someone knowlegeable about these speakers, as i have acquired a pair but have some questions. Ask in the newsgroup you're in. Don't expect people to want to type for you only. Ron email rg -- ******************************************* * My site is at: http://www.muyiovatki.dk * ******************************************* |
#4
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JBL LE 14C speakers
TUBELOVER wrote:
i would like to correspond by email or phone with someone knowlegeable about these speakers, as i have acquired a pair but have some questions. Ask in the newsgroup you're in. Don't expect people to want to type for you only. Ron email rg -- ******************************************* * My site is at: http://www.muyiovatki.dk * ******************************************* |
#5
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JBL LE 14C speakers
TUBELOVER wrote:
i would like to correspond by email or phone with someone knowlegeable about these speakers, as i have acquired a pair but have some questions. Ask in the newsgroup you're in. Don't expect people to want to type for you only. Ron email rg -- ******************************************* * My site is at: http://www.muyiovatki.dk * ******************************************* |
#6
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JBL LE 14C speakers
"TUBELOVER" wrote in message ... i would like to correspond by email or phone with someone knowlegeable about these speakers, as i have acquired a pair but have some questions. What do you need to know? Similar to the LE14A with 2" coaxial tweeter. Rated Power 35W continuous Nominal Impedance 8 ohms Crossover 2kHz (LX2-1) Efficiency 80 dB @1W,15ft. Suggested enclosure 4 cu ft ported (can be used in a 2cu ft enclosure as per the Lancer 55, which is the same except the tweeter is not coaxial, ie LE14A and LE20 tweeter) TonyP. |
#7
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JBL LE 14C speakers
"TUBELOVER" wrote in message ... i would like to correspond by email or phone with someone knowlegeable about these speakers, as i have acquired a pair but have some questions. What do you need to know? Similar to the LE14A with 2" coaxial tweeter. Rated Power 35W continuous Nominal Impedance 8 ohms Crossover 2kHz (LX2-1) Efficiency 80 dB @1W,15ft. Suggested enclosure 4 cu ft ported (can be used in a 2cu ft enclosure as per the Lancer 55, which is the same except the tweeter is not coaxial, ie LE14A and LE20 tweeter) TonyP. |
#8
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JBL LE 14C speakers
"TUBELOVER" wrote in message ... i would like to correspond by email or phone with someone knowlegeable about these speakers, as i have acquired a pair but have some questions. What do you need to know? Similar to the LE14A with 2" coaxial tweeter. Rated Power 35W continuous Nominal Impedance 8 ohms Crossover 2kHz (LX2-1) Efficiency 80 dB @1W,15ft. Suggested enclosure 4 cu ft ported (can be used in a 2cu ft enclosure as per the Lancer 55, which is the same except the tweeter is not coaxial, ie LE14A and LE20 tweeter) TonyP. |
#9
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JBL LE 14C speakers
"TUBELOVER" wrote in message ... i would like to correspond by email or phone with someone knowlegeable about these speakers, as i have acquired a pair but have some questions. What do you need to know? Similar to the LE14A with 2" coaxial tweeter. Rated Power 35W continuous Nominal Impedance 8 ohms Crossover 2kHz (LX2-1) Efficiency 80 dB @1W,15ft. Suggested enclosure 4 cu ft ported (can be used in a 2cu ft enclosure as per the Lancer 55, which is the same except the tweeter is not coaxial, ie LE14A and LE20 tweeter) TonyP. |
#10
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JBL LE 14C speakers
the speakers cones look like new, they are an light tan color with a peeble
finish. what i dont understand is the stiffness of the cone suspension. the cone will barely move in and out with a significant force on the cones. is this normal? rg |
#11
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JBL LE 14C speakers
the speakers cones look like new, they are an light tan color with a peeble
finish. what i dont understand is the stiffness of the cone suspension. the cone will barely move in and out with a significant force on the cones. is this normal? rg |
#12
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JBL LE 14C speakers
the speakers cones look like new, they are an light tan color with a peeble
finish. what i dont understand is the stiffness of the cone suspension. the cone will barely move in and out with a significant force on the cones. is this normal? rg |
#13
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JBL LE 14C speakers
the speakers cones look like new, they are an light tan color with a peeble
finish. what i dont understand is the stiffness of the cone suspension. the cone will barely move in and out with a significant force on the cones. is this normal? rg |
#14
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JBL LE 14C speakers
TUBELOVER wrote:
the speakers cones look like new, they are an light tan color with a peeble finish. what i dont understand is the stiffness of the cone suspension. the cone will barely move in and out with a significant force on the cones. is this normal? "significant force" ... what color is the front suspension, black? rg -- ******************************************* * My site is at: http://www.muyiovatki.dk * ******************************************* |
#15
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JBL LE 14C speakers
TUBELOVER wrote:
the speakers cones look like new, they are an light tan color with a peeble finish. what i dont understand is the stiffness of the cone suspension. the cone will barely move in and out with a significant force on the cones. is this normal? "significant force" ... what color is the front suspension, black? rg -- ******************************************* * My site is at: http://www.muyiovatki.dk * ******************************************* |
#16
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JBL LE 14C speakers
TUBELOVER wrote:
the speakers cones look like new, they are an light tan color with a peeble finish. what i dont understand is the stiffness of the cone suspension. the cone will barely move in and out with a significant force on the cones. is this normal? "significant force" ... what color is the front suspension, black? rg -- ******************************************* * My site is at: http://www.muyiovatki.dk * ******************************************* |
#17
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JBL LE 14C speakers
TUBELOVER wrote:
the speakers cones look like new, they are an light tan color with a peeble finish. what i dont understand is the stiffness of the cone suspension. the cone will barely move in and out with a significant force on the cones. is this normal? "significant force" ... what color is the front suspension, black? rg -- ******************************************* * My site is at: http://www.muyiovatki.dk * ******************************************* |
#18
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JBL LE 14C speakers
the suspension is a yellow colored surround which looks like rubber or a rubber
coated cloth. rg |
#19
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JBL LE 14C speakers
the suspension is a yellow colored surround which looks like rubber or a rubber
coated cloth. rg |
#20
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JBL LE 14C speakers
the suspension is a yellow colored surround which looks like rubber or a rubber
coated cloth. rg |
#21
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JBL LE 14C speakers
the suspension is a yellow colored surround which looks like rubber or a rubber
coated cloth. rg |
#22
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JBL LE 14C speakers
"TUBELOVER" wrote in message ... the suspension is a yellow colored surround which looks like rubber or a rubber coated cloth. Sounds like the original rubber suspension which does yellow and harden with age (originally a beige color). I wouldn't be pushing the cones by hand as the VC clearances are small and you don't want to damage the voice coil if it's still OK. OTOH if it doesn't work, and you can barely move the cone, then it sounds like it is already stuffed, probably overdriven. Whilst being a great speaker in its day, the coil former and epoxies used were much lower temperature that today's drivers. If the voice coil expands, then it will jam in the magnet gap, you will hear scraping sounds when you try to move it. TonyP. |
#23
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JBL LE 14C speakers
"TUBELOVER" wrote in message ... the suspension is a yellow colored surround which looks like rubber or a rubber coated cloth. Sounds like the original rubber suspension which does yellow and harden with age (originally a beige color). I wouldn't be pushing the cones by hand as the VC clearances are small and you don't want to damage the voice coil if it's still OK. OTOH if it doesn't work, and you can barely move the cone, then it sounds like it is already stuffed, probably overdriven. Whilst being a great speaker in its day, the coil former and epoxies used were much lower temperature that today's drivers. If the voice coil expands, then it will jam in the magnet gap, you will hear scraping sounds when you try to move it. TonyP. |
#24
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JBL LE 14C speakers
"TUBELOVER" wrote in message ... the suspension is a yellow colored surround which looks like rubber or a rubber coated cloth. Sounds like the original rubber suspension which does yellow and harden with age (originally a beige color). I wouldn't be pushing the cones by hand as the VC clearances are small and you don't want to damage the voice coil if it's still OK. OTOH if it doesn't work, and you can barely move the cone, then it sounds like it is already stuffed, probably overdriven. Whilst being a great speaker in its day, the coil former and epoxies used were much lower temperature that today's drivers. If the voice coil expands, then it will jam in the magnet gap, you will hear scraping sounds when you try to move it. TonyP. |
#25
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JBL LE 14C speakers
TUBELOVER wrote:
the suspension is a yellow colored surround which looks like rubber or a rubber coated cloth. That front suspension is - according to the information I have - likely to be very aged and it could require replacement. A pair of new 14" membrane assemblies are very costly. Most owners would agree that repair is well worth it. Try applying a 9 volt battery to the low frequency terminals - or main terminal if this unit has internal x-over, could check but hasn't, and see whether the membrane moves and listen for how it does it. A very skilled repair guy may be able to fit a third party foam front suspension to the units. Notice the wording "very skilled". These are precision loudspeakers and there is not a lot of airspace around the voice coil. Do be careful when you handle the aluminium chassis. These loudspeakers *require* a plane cabinet front for mounting and they *require* skilled (x) tensioning of the mounting screws. Frame warp is a very real risk, and mounting on an uneven surface may cause the aluminium to cold flow to permanently warped. It is unknown to me whether cold flow can also work to undo a warp if present. Cast aluminium tends to crack easily. As for why it is aluminium: such a frame does not lead the magnetic field astray. As long as they are not warped and as long as the voice coil cap is not filled up with melted copper these loudspeakers should have some kind of a market value. They are hardly ever to be considered trash. rg Kind regards Peter Larsen -- ******************************************* * My site is at: http://www.muyiovatki.dk * ******************************************* |
#26
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JBL LE 14C speakers
TUBELOVER wrote:
the suspension is a yellow colored surround which looks like rubber or a rubber coated cloth. That front suspension is - according to the information I have - likely to be very aged and it could require replacement. A pair of new 14" membrane assemblies are very costly. Most owners would agree that repair is well worth it. Try applying a 9 volt battery to the low frequency terminals - or main terminal if this unit has internal x-over, could check but hasn't, and see whether the membrane moves and listen for how it does it. A very skilled repair guy may be able to fit a third party foam front suspension to the units. Notice the wording "very skilled". These are precision loudspeakers and there is not a lot of airspace around the voice coil. Do be careful when you handle the aluminium chassis. These loudspeakers *require* a plane cabinet front for mounting and they *require* skilled (x) tensioning of the mounting screws. Frame warp is a very real risk, and mounting on an uneven surface may cause the aluminium to cold flow to permanently warped. It is unknown to me whether cold flow can also work to undo a warp if present. Cast aluminium tends to crack easily. As for why it is aluminium: such a frame does not lead the magnetic field astray. As long as they are not warped and as long as the voice coil cap is not filled up with melted copper these loudspeakers should have some kind of a market value. They are hardly ever to be considered trash. rg Kind regards Peter Larsen -- ******************************************* * My site is at: http://www.muyiovatki.dk * ******************************************* |
#27
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JBL LE 14C speakers
TUBELOVER wrote:
the suspension is a yellow colored surround which looks like rubber or a rubber coated cloth. That front suspension is - according to the information I have - likely to be very aged and it could require replacement. A pair of new 14" membrane assemblies are very costly. Most owners would agree that repair is well worth it. Try applying a 9 volt battery to the low frequency terminals - or main terminal if this unit has internal x-over, could check but hasn't, and see whether the membrane moves and listen for how it does it. A very skilled repair guy may be able to fit a third party foam front suspension to the units. Notice the wording "very skilled". These are precision loudspeakers and there is not a lot of airspace around the voice coil. Do be careful when you handle the aluminium chassis. These loudspeakers *require* a plane cabinet front for mounting and they *require* skilled (x) tensioning of the mounting screws. Frame warp is a very real risk, and mounting on an uneven surface may cause the aluminium to cold flow to permanently warped. It is unknown to me whether cold flow can also work to undo a warp if present. Cast aluminium tends to crack easily. As for why it is aluminium: such a frame does not lead the magnetic field astray. As long as they are not warped and as long as the voice coil cap is not filled up with melted copper these loudspeakers should have some kind of a market value. They are hardly ever to be considered trash. rg Kind regards Peter Larsen -- ******************************************* * My site is at: http://www.muyiovatki.dk * ******************************************* |
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