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Old 06-10-2018, 02:26 PM
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Default KX-5 Twenty output impedance?

Does anyone know what it is? Ayre doesn't include it in the specs. I'm using the KX-5 Twenty with a VX-5 Twenty amp (2MΩ input impedance), but wondering about pairing it with the 100kΩ input impedance Parasound JC 1 monoblocks.

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Old 06-10-2018, 02:53 PM
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So long as the output impedance "rating" of preamplifier is less than the input impedance of the amplifier(s), the units should be compatible.
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Old 06-10-2018, 03:44 PM
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Stereophile review said "The preamplifier's unbalanced output impedance was a low 78 ohms from 20Hz to 20kHz; the balanced impedance was twice that figure, as expected."

You are absolutely fine. The general rule is 1:10 ratio and above is good.

https://www.stereophile.com/content/...r-measurements
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Old 06-10-2018, 04:42 PM
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That's an exceptionally robust output impedance for a preamplifier. Should be more than capable of running any amplifier ever made - or several at once.
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MAIN: McIntosh: MC2125 (2), MC2155, C32, MR80, MQ101, CR7 MPI4, Polk: RTiA7, RTiA9; Snell J7; Pioneer PL 518; A/T 440MLa; Yamaha CD S300
VINTAGE: McIntosh: MX113, MC2505, CR7; Altec Model 14; Boston T1000; Yamaha: CDX 393, Pioneer PL 518 A/T 440MLa
OTHER: MAC1500, MX110, MC240
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