impedance and supertweeter

xcortes · 31st January 2005, 09:03 PM

i'm thinking of adding a fostex t90a supertweeter (8 ohm) to a pair of supravoxes (4 ohm) on open baffles.

if i connect the supertweeter in parallel what is the system impedance going to be?

i found a calculator that says 2 2/3. this is low for my amps that have 4 ohm taps.

any help will be (as usual) appreciated.

gary f · 1st February 2005, 12:48 PM

The supertweeter needs a higpass filter so the impedance will not change for the woofers. The impedance will be 4 Ohm (nominal) in the low/mid frequencies covered by the woofers and then, in the supertweeter region, the impedance will be 8 Ohm (nominal).

Impedance is not well represented by a single number, it is frequency dependant.
F

31st January 2005, 09:03 PM	#1
xcortes diyAudio Member Join Date: Feb 2004 Location: Mexico City	impedance and supertweeter i'm thinking of adding a fostex t90a supertweeter (8 ohm) to a pair of supravoxes (4 ohm) on open baffles. if i connect the supertweeter in parallel what is the system impedance going to be? i found a calculator that says 2 2/3. this is low for my amps that have 4 ohm taps. any help will be (as usual) appreciated.

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1st February 2005, 12:48 PM	#2
gary f diyAudio Member Join Date: Aug 2003 Location: Quebec city	The supertweeter needs a higpass filter so the impedance will not change for the woofers. The impedance will be 4 Ohm (nominal) in the low/mid frequencies covered by the woofers and then, in the supertweeter region, the impedance will be 8 Ohm (nominal). Impedance is not well represented by a single number, it is frequency dependant. F

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