"Sine-cap" tweeter crossover

[Klimon]

http://www.stereophile.com/standloudspeakers/915/

Anyone tried this? Looks tempting

Simon

[crazyhub]

http://www.humblehomemadehifi.com/Paper-HATT.html

See particularly the filter explanations named "The world's best capacitor"

[planet10]

Originally posted by Klimon
Anyone tried this? Looks tempting

A series XO variant... Nordmende used these on the isophon yweeters in there consoles so it has been around for at least 30 years and probably predates that.

dave

[Pano]

An interesting variant. Not sure about that big 20R series, tho...

But it should give a smoother, better slope than a cap alone. If you use an L-Pad in front of the tweeter, it would be about the same (I think).

[Klimon]

If you use an L-Pad in front of the tweeter, it would be about the same (I think).

Looks like it. Seems to combine the effects of a classical single cap hi-pass + L-pad + series notch filter.

Thanks for the link.

Simon

[Pano]

yeah - one thing you'll want to note in the link - DCR of the coil needs to be very low. That's a fact, or you'll be sending low end into the tweeter.

So none of those cute little 20 gauge inductors!

[planet10]

Originally posted by panomaniac
yeah - one thing you'll want to note in the link - DCR of the coil needs to be very low. That's a fact, or you'll be sending low end into the tweeter.

So none of those cute little 20 gauge inductors!

Interestingly enuff the choke on the Nordmende/Isophons was a little 24-28g powder core inductor.

dave