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Topic: JBL K120 problem |
Olli Haavisto
From:
Jarvenpaa,Finland
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Posted 9 Aug 2010 9:45 am |
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I recently bought a JBL K120 speaker on eBay Germany. I looks like it`s been reconed recently; black paper, shiny dentless dome. It looks perfect.
I have another K120 which has been my favorite speaker since I got it, so I know what it`s supposed to sound like.
This new one is nothing like it. Much lower efficiency, weaker bottom, shrill treble...BAD tone
Is there anything I can do ? The seller doesn`t answer my emails, so I can`t find out what kit it was reconed with or anything.
I`m not looking for advice on getting my money back, I`m looking for suggestions to make this speaker sound like a K120 should.
Thanks!!!
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Olli Haavisto
Finland |
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Jerry Overstreet
From:
Louisville Ky
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Posted 9 Aug 2010 11:53 am
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Almost all new re-cones require a break-in period before they soften and sweeten up. Some folks advocate playing it through a stereo system, etc. for several hours first. [If you plan on keeping it and can't get any relief from the re-cone tech, you have nothing to lose by trying this. OTOH, if it just sounds really horrible, it may be an un-salvageable poor job with poor re-cone parts.]
I don't believe that the output/efficiency would be affected though. Perhaps something wrong with, or some parts in, the voice coil are incorrect. Else, the cone paper is heavier and/or stiffer than your original.
I once let a perfectly good M30 Lansing go due to a new re-cone. I didn't realize at the time that a break-in was necessary.  |
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Brad Sarno
From:
St. Louis, MO USA
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Posted 9 Aug 2010 12:45 pm
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Can you measure the DC resistance of the voice coil?
Brad |
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Olli Haavisto
From:
Jarvenpaa,Finland
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Posted 9 Aug 2010 1:27 pm
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Brad, how does 6.1 ohms sound ?
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Olli Haavisto
Finland
Last edited by Olli Haavisto on 10 Aug 2010 10:10 am; edited 1 time in total |
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Dave Grafe
From:
Hudson River Valley NY
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Posted 10 Aug 2010 9:49 am
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| you can always get a new JBL cone put in it if you suspect that the current cone is bogus. |
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James Morehead
From:
Prague, Oklahoma, USA - R.I.P.
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Posted 10 Aug 2010 4:41 pm
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Sounds like it's 8 ohms alright. It was probably an aftermarket recone kit. If you paid with paypal, you can contact Paypal and they will get your money back for you and you can send the speaker back. He won't ignore paypal, they will freeze his account. You are in the right.
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"Good judgement comes from experience, and a lot of that comes from bad judgement"~old cowboy proverb.
shobud@windstream.net |
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Mike Bowles
From:
Princeton, West Virginia, USA
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Posted 14 Aug 2010 8:54 am speaker
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does a small dent in the shiny dome in the middle of the speaker hurt it? i have a nv1000 with a dent in the shiny dome peavey replaced the speaker in mine when it was new they sent me this speaker i havent been able to tell any difference but i dont use it that much i use a 112 would like to trade it for another 112 dont need all that power
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Mike Bowles |
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Olli Haavisto
From:
Jarvenpaa,Finland
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Posted 14 Aug 2010 9:01 am
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My experience has been that little dents have no effect on the sound.
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Olli Haavisto
Finland |
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Mike Bowles
From:
Princeton, West Virginia, USA
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Posted 14 Aug 2010 9:54 am speakers
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thanks olli i have never noticed any difference
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Mike Bowles |
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Olli Haavisto
From:
Jarvenpaa,Finland
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Posted 14 Aug 2010 10:06 am
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Back to my problem...
So, do I have a bad recone or what?
It seems strange that the tone is not even remotely like my original cone K120. Should I re-recone it with a reputable kit or just forget it and file my losses?
Sending it over to the States is not an option due to shipping costs.
Anyone know a good reconer in Europe?
Thanks
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Olli Haavisto
Finland |
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