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EV S-1503 crossed over
EV S-1503 crossed over
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Old 4th January 2013, 10:28 PM   #11
JMFahey is offline JMFahey  Argentina
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Join Date: Mar 2009
Location: Buenos Aires - Argentina
to a more modern voice coil former material
Thanks for the info.
Care to detail some of those differences?
I guess the winding itself must have remained about the same (maybe with a newer adhesive).
Is it Edge Wound Aluminum or Copper?
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Old 5th January 2013, 11:10 AM   #12
thejohn is online now thejohn  South Africa
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Location: Cape Town, South Africa
Apart from high temp glues etc, EV also changed their testing method over the years, from their own band limited pink noise test to various EIA, AES and ANSI standards as they came out. So you even find different power ratings for identical drivers...
Looking at the EDS's for various models over the years is quite enlightening.

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Old 19th May 2017, 01:21 PM   #13
John Ebli is offline John Ebli
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The original EVM-15B had an Xmax of 3.3mm and was rated at 100w continuous sine wave (at what frequency...who knows?

The EVM-15B Series II also had an Xmax of 3.3mm (same coil) but was rated at 200w per EIA Standard RS-426A

The EVM-15B PROLINE also had an Xmax of 3.3mm (same coil) but with an aluminum shorting ring attached the top of the pole piece to reduce dynamic compression and improve voice coil cooling. It was rated at 400w per EIA Standard RS-426A

The DL15X is the same as the EVM-15B PROLINE only with a longer voice coil, increasing the Xmax to 4.1mm. It is rated at 400w as well.

All of these drivers can be restored/upgraded with a DL15X recone kit. Just be aware that if the magnet pole piece does not have the aluminum shorting ring attached, the maximum thermal power capacity will be approximately 3db less.

Last edited by John Ebli; 19th May 2017 at 01:49 PM.
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