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High Efficiency Speaker Asylum Need speakers that can rock with just one watt? You found da place. |
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High Efficiency Speaker Asylum Need speakers that can rock with just one watt? You found da place. |
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In Reply to: Re: JBL D130...why did this speaker sell for so much?? Rare model? posted by Tom Dawson on July 1, 2005 at 09:22:48:
"How much, in your experience did later versions of the the D130 lose wrt its midband efficiency (before cone breakup) as compared to the highest efficiency earlier versions?"Hard to say, T/S parameters didn't exist back then. Posted parameters were from later re-cones. Original units had equal length or slightly underhung coils (depending on which version) on paper coil formers. Re-cones had Kapton formers with the longer coils found on the newer units. The top plates had to be replaced to re-cone with the Kapton former, increasing gap volume. Efficency was reduced from both the longer coil and the greater gap volume.
"Interestingly enough, all the data fields to the right of Pe for the 2220 H, J are blank now, like for Xmax - JBL holding out on us?."
Published x-max specs are not done the same for newer drivers. It is not easy to make a comparison for that reason.
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Follow Ups
- X-max, No%, etc. - djk 07/3/0502:12:22 07/3/05 (0)
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