Electro-voice horns

[edo]

Hi, to start off I am rebuilding a set of old Carvin PA speaker cabinets. The horns in the system are old Electro-voice PA30A's. The only thing that I have been able to find out about these horns is that they are 30 watts. I know how to build a 6 db crossover but am concerned that the horns will blow out do to amplifer wattage (250 watt amp). Can I limit the wattage with a resistor somewhere in the crossover network? Hope I have given enough information.

[johnl]

Provided Link: Electro-Voice auctions


Have you tried at E-Bay. Search at the link below.

[billfitzmaurice]

> The only thing that I have been able to find
> out about these horns is that they are 30
> watts.

That's 30 watts within their passband, not system power. What that translates to in system power depends on the crossover frequency and slope.

> I know how to build a 6 db crossover
> but am concerned that the horns will blow
> out do to amplifer wattage (250 watt amp).

A 250 watt amp wouldn't be the reason for blowing the driver, a 6dB crossover would. 3rd order is the minimum acceptable slope for pro-sound, and 4th order is preferred.

> Can I limit the wattage with a resistor
> somewhere in the crossover network? Hope I
> have given enough information.

You can adjust the horn output with an LPad.

[kenmcculloch]

> That's 30 watts within their passband, not
> system power. What that translates to in
> system power depends on the crossover
> frequency and slope.

> A 250 watt amp wouldn't be the reason for
> blowing the driver, a 6dB crossover would.
> 3rd order is the minimum acceptable slope
> for pro-sound, and 4th order is preferred.

> You can adjust the horn output with an LPad.

Or you could use an autotransformer like Klipsch does (or used to do). I have read where it has advantages over the double resistor attenuation network. Costs a lot more though.