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4pi: B&C DE 250 Impedance, is it 8 or 16 ohms? [message #78786]

Fri, 27 December 2013 18:39

dmeckstr
Messages: 5
Registered: December 2013
Location: Los Gatos

Esquire

Hi Wayne,

I noticed on the new version of the 4pi cross-over schematic that the tweeter is marked as 16 ohms. I wanted to confirm that with you (before I actually buy some Rolling Eyes

).

Thanks again,

David

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Re: 4pi: B&C DE 250 Impedance, is it 8 or 16 ohms? [message #78787 is a reply to message #78786]

Fri, 27 December 2013 19:08

Wayne Parham
Messages: 18787
Registered: January 2001

Illuminati (33rd Degree)

No, the tweeter is 8Ω. The part you're referring to is Rs, which is a 16Ω, 10W resistor placed in shunt across the compression driver.

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Re: 4pi: B&C DE 250 Impedance, is it 8 or 16 ohms? [message #78788 is a reply to message #78787]

Fri, 27 December 2013 19:48

dmeckstr
Messages: 5
Registered: December 2013
Location: Los Gatos

Esquire

Thanks Wayne,

I was just coming back on to say I looked at the schematic again and realized that there was a new part there. Also, I see a couple posts down you told someone you use the DE 250-8. :~

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Re: 4pi: B&C DE 250 Impedance, is it 8 or 16 ohms? [message #78789 is a reply to message #78788]

Sat, 28 December 2013 06:53

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

Illuminati (2nd Degree)

Speaking of Ohms, I'm finally, with a lot of help from Professor Brown, building the 50 Watt Monoblocks. The 5K Hammond 1650R OPTs have 4, 8 and 16 Ohm taps. My 4 Pi 2226Js, are 16 Ohm and the DE-250s, as the OP discovered, are 8.

I'm going to have 8 and 16 Ohm outputs, which is best for the 4 Pis? I'd hate to lose 33% of the Wattage with too low an impedance.

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