Prev: Switching over
Next: Some airshow pics
From: Matt Cameron on 27 Jun 2008 21:19
Hello all. I'm an ex-full-time engineer who's gone back to part-time
work, and just started a stint at a local concert venue. On stage we
use EAW SM-202-H monitors; a few hours ago I came in for my first
night and several of the monitors had extreme high-frequency loss---
putting my face dead in front of them, sounded like little or nothing
coming out of horn (in the middle of the enclosure between 2x 12"s).
A few years ago I would have had more interest in cracking the
speakers open and solving this as a project; now I submit it to those
who know better than I before all that hard work: at a glance seems
like blown drivers; other thoughts though: could the passive crossover
have been damaged somehow, and be inhibiting signal to the horn? I
feel like this must have happened recently too, as I was conversing
with the main sound guy the other day before he left on tour, and he
didn't say anything about some monitors being better than others (and
there are others that perform perfectly).
How cheap and time-consuming would you estimate this problem to be? I
hate to come into a job saying "you have to spend this much to get
your monitors working..."
I know this probably isn't enough information for a real diagnosis,
but any thoughts, or "i've seen this a million times before"s would
help. Cheers,

Cam
From: Eeyore on 28 Jun 2008 05:53


Matt Cameron wrote:

Hi Matt, love to help but have you heard of these things called
'paragraphs' ?

Huge blocks of solid unbroken text I find next to totally unreadable.

Graham

From: Peter Larsen on 29 Jun 2008 13:34
Matt Cameron wrote:

> Hello all. I'm an ex-full-time engineer who's gone back to part-time
> work, and just started a stint at a local concert venue. On stage we
> use EAW SM-202-H monitors; a few hours ago I came in for my first
> night and several of the monitors had extreme high-frequency loss---
> putting my face dead in front of them,

You do not do that. You never ever do that. Permanent deafness could be the
result.

> sounded like little or nothing
> coming out of horn (in the middle of the enclosure between 2x 12"s).
> A few years ago I would have had more interest in cracking the
> speakers open and solving this as a project

A 1.5 volt battery is your friend.

; now I submit it to those
> who know better than I before all that hard work: at a glance seems
> like blown drivers; other thoughts though: could the passive crossover
> have been damaged somehow, and be inhibiting signal to the horn?

Yes.

> I
> feel like this must have happened recently too, as I was conversing
> with the main sound guy the other day before he left on tour, and he
> didn't say anything about some monitors being better than others (and
> there are others that perform perfectly).
> How cheap and time-consuming would you estimate this problem to be?

Depends on what is broken. It might well be a protection device that had
overloaded.

> I
> hate to come into a job saying "you have to spend this much to get
> your monitors working..."

And nobody here can tell you what it is that is broken.

> I know this probably isn't enough information for a real diagnosis,
> but any thoughts, or "i've seen this a million times before"s would
> help. Cheers,

And what Graham said ....

> Cam

Kind regards

Peter Larsen


From: Steve M on 29 Jun 2008 19:05
"Peter Larsen" <digilyd(a)hotmail.com> wrote:
> Matt Cameron wrote:
>
>> Hello all. I'm an ex-full-time engineer who's gone back to part-time
>> work, and just started a stint at a local concert venue. On stage we
>> use EAW SM-202-H monitors; a few hours ago I came in for my first
>> night and several of the monitors had extreme high-frequency loss---
>> putting my face dead in front of them,
>
> You do not do that. You never ever do that. Permanent deafness could be
> the result.
>


Agreed. I find it hard to believe that anyone claiming to have been a
"full time engineer" would do something so foolish. I also doubt that claim,
if
they cannot diagnose a simple thing like a non-functioning horn in a wedge.
Pretty basic stuff when it comes to pulling the driver assembly and testing
with
a battery, as hinted by you. Smacks of laziness, too.


--
Steve <snip> McQ


 | 
Pages: 1
Prev: Switching over
Next: Some airshow pics