Anyone know input impedance of audio innovations 500 amp?

[philv]

Thanks

[Macca]

100KΩ according to this ad

https://reverb.com/item/50964003-audio-innovations-series-500-tube-integrated-amplifier-original-box#:~:text=Power%20output%2025W%20into%202%20CH%2 0at%208%CE%A9,%2F%20CD%20%2F%20Aux%20%2F%20Tape%20 %2F%20Monitor

[philv]

Thanks.

I Was told elsewhere 47k and 220k.

But 100 or 220k,same ballpark i guess for practical purposes.

[Macca]

For matching, I'd assume the worst case.