269-958 Closeout Crossover

[kduggan]

This crossover is designed to be a 200HZ 2Way 12db crossover at 4 ohms. I hae a three way design that I need to cross at around 400 Hz that uses 8 ohm drivers. Will this crossover work or am I doing the math wrong?

[curt_c]

> This crossover is designed to be a 200HZ
> 2Way 12db crossover at 4 ohms. I hae a three
> way design that I need to cross at around
> 400 Hz that uses 8 ohm drivers. Will this
> crossover work or am I doing the math wrong?

The inductors will be the correct value, but the caps will need to be ¼ of their existing value. You’d likely want to replace them with poly caps anyway…

C

[unknownuser]

> The inductors will be the correct value, but
> the caps will need to be ¼ of their existing
> value. You’d likely want to replace them
> with poly caps anyway…

> C

I don't see the point of using poly caps with ferrite core inductors... Especially when they are shunt caps.


(Originally posted by: James Lee)

[curt_c]

> I don't see the point of using poly caps
> with ferrite core inductors... Especially
> when they are shunt caps.

IMO, there is nothing wrong with cored inductors. As long as you keep within their power rating they offer an attractively low DCR, and very little, if any, audible distortion. I regularly use toroidal cored inductors in my designs and have yet to have an issue with them.

I don’t have anything against ‘lytic caps either. Their cost is very agreeable and will likely last for years before any issues arise. Most folks however, choose to use poly whenever practical.

I will say that IMO, (of course) any component in a crossover network will have an effect on the response of the driver. If the component has an effect on the transfer function, how can any distortion it produces not be felt by the driver as well? Consider that in a 2nd order LP, any distortion generated by the shunt cap is felt directly across the driver. Granted that the levels of distortion generated will likely be vanishingly low, but shunt components need to be just as capable as series components, all else being equal.

C