sonicguard

[imtkjlu]

sonicguard

How does it work ? how do I build my own ?

Cheers /Kjell

[Baron030]

Here is a link to get an explanation on how it works.
http://www.jblproservice.com/general_faq.htm

To build your own, I would start by researching several of the JBL products that have "SonicGuard". This would give you an understanding of how the LP1 and LP2 "light bulbs" are used. And who knows, you might even find a JBL crossover network design that you can include in your project. Why reinvent the wheel, when you don't have to.
It might also be helpful to say what crossover network design you are planning on modifying and which JBL speaker components you are using in your project.

Baron030

[imtkjlu]

Ugh, what a terrible font/style i used in my question!
Thank you for the information
Where can I bye this "light bulbs" ?
My interest was just general, how it works and how to build...
Regards /Kjell

[10 Watt Street]

The UREI monitors also used light bulbs as fuses, mounted on the front panel for easy replacement. I was once in a studio where the light bulbs were taped over because they were distracting when they flashed to the beat.

[louped garouv]

I have read a mentioning of using lightbulbs in a preamp's circuit as well to draw some juice to help prevent the mixer's 'output stage' (I am guessing here) from clipping...

supposedly it was a throwback to tube audio practices...

does anyone have a pointer to some additional reading on this topic?

[hjames]

I don't think it was to prevent clipping, rather to indicate possible clipping.
Momentary blinks are ok, but when it is on nearly continuously, beware ...

They are basically just a resistive load but if you load them too hard the filament would burn out. Of course the sound would presumably be overdriven and crappy before the bulb would blow ... at least thats how most peak indicators should work.

I have read a mentioning of using lightbulbs in a preamp's circuit as well to draw some juice to help prevent the mixer's 'output stage' (I am guessing here) from clipping...

supposedly it was a throwback to tube audio practices...

does anyone have a pointer to some additional reading on this topic?

[Hoerninger]

... some additional reading on this topic?

Take this:
When lightening the resitance of the bulb arises, the speaker gets relativly less voltage - sort of dynamic compressor. When the voltage is too high the bulb blows - sort of a fuse.
(When child my father built a "lamp box" for our electric railway - no smoking transformer ever. )
___________
Peter