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2Pi Coil across woofer? [message #75212]

Fri, 11 January 2013 11:01

Bill Epstein
Messages: 1088
Registered: May 2009
Location: Smoky Mts. USA

Illuminati (2nd Degree)

I've got a schematic that almost looks like the coil is across the woofer and tweeter and doesn't show a series cap on the tweeter.

Could it be so old it's for the Piezo version?

The coil is in parallel on the Woof and the cap in series with the + Tweeter, right?

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Re: 2Pi Coil across woofer? [message #75213 is a reply to message #75212]

Fri, 11 January 2013 12:08

Wayne Parham
Messages: 18738
Registered: January 2001

Illuminati (33rd Degree)

There has always been a 0.5mH coil in series with the woofer, even back when we were running piezos. It's inline on the "+" wire. So that's probably the coil you're talking about. There was no capacitor in either the woofer or tweeter circuit on the old piezo models.

The tweeter circuit now has a series 10uF capacitor, and a shunt 16Ω resistor. So put the resistor directly across the tweeter leads, and put the capacitor inline on the "+" wire.

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