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Old 6th September 2004, 04:07 PM   #1
silvano is offline silvano  Italy
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Hello, I am Silvano from Italy.
I have buyed a THRESHOLD SA/3.9e and a THRESHOLD S/350e amps. I have also an AUDIO RESEARCH EC-21 electronic crossover.
What I need is the Input impedance of the SA/3.9e and S/350e to set my EC-21.

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Old 6th September 2004, 05:33 PM   #2
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Balanced or unbalanced?
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Old 7th September 2004, 07:04 AM   #3
silvano is offline silvano  Italy
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Location: Milano
I need the value of unbalanced input impedance for calculate the 450Hz cut to my EC21 crossover.
Audio Research suggest to use 30K input impedance as treble amplifier.
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