Hello everyone, this thread to share my experience with two genuine Electro-Voice DL15W recone kits (part F.01U.110.893) bought from The Speaker Exchange(reconingspeakers.com)
EV Electro Voice 15" DL15W Recone Kit F.01U.110.893 - Speaker Exchange
I received the 2 kits in perfect order (but bulk not on an EV box), fit them on my EV DL15, break in at 20Hz during 6 days... and then test on DATS v3:
Where I should get an Fs=21Hz, Qts=0.16, Qms=4.38 as specified on speakers data, I measure Fs=31Hz, Qts=0.28, Qms=11.21 on the DATS... Qms is 160% out of spec...
It’s not electrical, only mechanical: the Mms is correct but the Qms is too high (+160%) which indiacte that spider and/or surround is too stiff, even after break in.
then a question: are theses cone genuine EV ?
I contact The Speaker Exchange about that, the answer is:
I’m sorry you are disappointed in the parts you purchased. However, I can assure you that we sent you the exact parts that we purchased from EV. New parts can never be compared to old parts because there are often some changes. This is across the board with all brands
Off the top of my head, can come up with many reasons that the specs might not match up exactly to your old speaker: changes in production of the parts, incorrect reconing (setting the voice coil too high, too low, too much adhesive, etc), problems with the wiring, crossover, cabinet, terminal, etc.
Again, we absolutely, definitely, 100% sent you the parts that EV sent us. We do not lie about our listings, nor do we ever make changes if needed without notifying you first. Frankly suggesting that we lie and cheat is extremely insulting when we bend over backwards to be clear about what we sell.
I can hear EV sell parts which doesn’t match exactly my old speakers, but they stays around the specifications range… In my case, the Qms is 160% higher than it should be, i don’t think it’s in the EV margin…
3 pictures bellow:
PICT 1 is genuine EV F.01U.110.893 cone
PICT 2 is an aftermarket DL15W cone
PICT 3 is The Speaker Exchange received cone
What to think... PICT 3 cone seems very close to PICT 2 ans sadly not to PICT 1
EV Electro Voice 15" DL15W Recone Kit F.01U.110.893 - Speaker Exchange
I received the 2 kits in perfect order (but bulk not on an EV box), fit them on my EV DL15, break in at 20Hz during 6 days... and then test on DATS v3:
Where I should get an Fs=21Hz, Qts=0.16, Qms=4.38 as specified on speakers data, I measure Fs=31Hz, Qts=0.28, Qms=11.21 on the DATS... Qms is 160% out of spec...
It’s not electrical, only mechanical: the Mms is correct but the Qms is too high (+160%) which indiacte that spider and/or surround is too stiff, even after break in.
then a question: are theses cone genuine EV ?
I contact The Speaker Exchange about that, the answer is:
I’m sorry you are disappointed in the parts you purchased. However, I can assure you that we sent you the exact parts that we purchased from EV. New parts can never be compared to old parts because there are often some changes. This is across the board with all brands
Off the top of my head, can come up with many reasons that the specs might not match up exactly to your old speaker: changes in production of the parts, incorrect reconing (setting the voice coil too high, too low, too much adhesive, etc), problems with the wiring, crossover, cabinet, terminal, etc.
Again, we absolutely, definitely, 100% sent you the parts that EV sent us. We do not lie about our listings, nor do we ever make changes if needed without notifying you first. Frankly suggesting that we lie and cheat is extremely insulting when we bend over backwards to be clear about what we sell.
I can hear EV sell parts which doesn’t match exactly my old speakers, but they stays around the specifications range… In my case, the Qms is 160% higher than it should be, i don’t think it’s in the EV margin…
3 pictures bellow:
PICT 1 is genuine EV F.01U.110.893 cone
PICT 2 is an aftermarket DL15W cone
PICT 3 is The Speaker Exchange received cone
What to think... PICT 3 cone seems very close to PICT 2 ans sadly not to PICT 1
Attachments
Blackgotan,
You mentioned "break in at 20Hz during 6 days..." but no reference to the excursion the "break in" was done at. If there was no visible cone movement during the 6 days, there was no "break in".
I recall my DL15Ws moving close to Xlim 12.7mm (1" peak to peak) with some warped records, if you have not measured at least 12mm peak to peak movement, the driver probably is not broken in.
If you have already seen that level of excursion, and also have previously measured other woofers that result in measurements matching factory specs, then there might be a problem with the kits.
Art
You mentioned "break in at 20Hz during 6 days..." but no reference to the excursion the "break in" was done at. If there was no visible cone movement during the 6 days, there was no "break in".
I recall my DL15Ws moving close to Xlim 12.7mm (1" peak to peak) with some warped records, if you have not measured at least 12mm peak to peak movement, the driver probably is not broken in.
If you have already seen that level of excursion, and also have previously measured other woofers that result in measurements matching factory specs, then there might be a problem with the kits.
Art
Yes, dont worry. It just needs some punishment and real world duty to settle down to the manufacturer specs (break in). Dont except it to happen in one hour. Been there, here is one example. Some parameters are depending on how you measure. manufacturer may have different procedures.
Left: old well used driver. Right: almost brand new. RCF L15P540. So yes, those parameters will shift a lot in some woofers.
Left: old well used driver. Right: almost brand new. RCF L15P540. So yes, those parameters will shift a lot in some woofers.
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It is entirely possible that EV has changed the part.
The speaker has been around for well over 30 years and EV has changed ownership and manufacturing locations several times within that period.
Maybe the kit is correct and your "old well used" measurements are what has drifted from correct?
Run some software simulations with your box and see what each set of measured parameters provides for output
The speaker has been around for well over 30 years and EV has changed ownership and manufacturing locations several times within that period.
Maybe the kit is correct and your "old well used" measurements are what has drifted from correct?
Run some software simulations with your box and see what each set of measured parameters provides for output
Sounds in line with the difference in Fs you measured compared to the factory specification, which as tonskulus and I have pointed out, could indicate the suspension is still not broken in.
Have you pushed the driver to at least 12mm peak to peak movement?
If so, for how long?
If so, how long after that was the test performed?
Are you certain the voice coil is centered exactly at the correct height in the gap?
Do both voice drivers measure the same?
What is DC resistance do you read?
How many drivers have you re-coned prior to these?
What output voltage did you use with your DATs test?
Have you previously measured other woofers that result in measurements matching factory specs to confirm your test set up?
Without the answers to those questions, I would not venture an opinion on whether the kits meet EV specifications.
That said, the Speaker Exchange absolutely, definitely, 100% sending you the parts that EV sent them does not in any way guarantee that EV sent them all the correct parts 😉.
Art