Is it blown?

[netwerks]

A friend of mine has a pair of old heavy EV sh-1512 two way cabs.

http://archives.telex.com/archives/EV/S ... %20EDS.pdf

The horns in both cabs work fine.

One one cab it is not putting out anything on the woofer. So I would presume, it's toasted.

The other does not play sound at low volume, as you turn it up it starts to cut in and out and after you run quite a bit of power in, it will play but a bit distorted. I assume this woofer is on its way out. Also the longer it plays at high volume it also begins to cut in and out. I'm assuming heat related i don't know...Any idea what would be the root cause of this?

I originally thought it may be due to a dirty pot but i cleaned them, and then added another set of cabs to test and there was no problem on those cabs. (I don't want to take them apart just yet)

So now he's considering reconing the woofers or installing replacement woofers although I wouldn't begin to know what driver to replace them with.

Another alternative is to build a set of BFM cabs to replace them.

He's got a big old heavy Parasound HCA series amp http://www.parasound.com/vintage/hca1500a.php and since the cabs will be in his garage and never get moved. (ever)

I'm thinking a pair of Omni 15 full range tall boys

[Sydney]

I'm assuming heat related i don't know...Any idea what would be the root cause of this?

I'm guessing they were pushed with too much voltage too long (heat).
Ask your friend perhaps he was at the scene
Measure with a meter or better still an imp. sweep

Syd

[netwerks]

I'm guessing they were pushed with too much voltage too long (heat).
Ask your friend perhaps he was at the scene
Syd

Hey Syd, he was. Drinking beer and playing loud. Guaranteed.

I see I can get the EV drivers 1815-0992 reconed for $130 for the pair @ parts express but I really don't really want to get in the box.

I'm thinking convince him to just build a new pair. I tend to believe a pair of BFM Omni cabs on a parasound amp would sound fantastic and likely 3x as loud w same power.

[Sydney]

I'm not psychic, but i figured you really are looking for a "reason" to build
Eval. of those woofers should only take about 15 mins.
Not knowing about the resale value of those repaired - it comes down to - is it worth it to invest money and time if you don't get it back.
Who knows, someone may have a need for them as is...

Syd

[netwerks]

I'm not psychic, but i figured you really are looking for a "reason" to build
Eval. of those woofers should only take about 15 mins.
Not knowing about the resale value of those repaired - it comes down to - is it worth it to invest money and time if you don't get it back.
Who knows, someone may have a need for them as is...

Syd

Of course i'm looking for a reason.

And to top it off I doubt he'd recoup his cost not compounding the time spent on the sale.

I was more interested to know about the symptoms of the driver actually working at high volumes but not at low while cutting in and out after playing for some time. Sounds that driver like it's "on its way out" but not quite there yet.

I hadn't witnessed this "partially working" woofer scenario before, any other time i've come across one it's just blown and non-working alltogether.

[Sydney]

Sounds that driver like it's "on its way out" but not quite there yet.

Again I think you nailed it ( one dead one critically injured ).
Perhaps the VC got hot enough to burn spots and deform the former and with sufficient voltage will jump the bad spot ( arc intermittent ).
I've seen this sort of thing ( in my younger days of course )
because Alcohol and sound systems don't mix

Syd

[Ron K]

An old pair of EV15Bs or Ls will work fine in that box. Its basically a TL606 type box but shaped to accommodate a horn up top. I have some old 15Bs in good shape if your interested. I'll let them go for a very fair price. They were reconed around 2002 but have seen very little use since then. I'd say less then 15 hrs on them since reconing. I had bought the baskets/magnets from a guy for cheap because he had blown the cones apart by sticking them into an old W bin for which they were not designed. I think I also have 2 15Ls laying somewhere that need recone. They came out of and old Fender Twin! I could recone them and sell them cheap as well. Probably only a few bucks more then the kit plus shipping.

PM me if interested.

[netwerks]

Looks like I need an EV replacement driver 1815-0992. Can't seem to find them online...
.