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Help please Laser FX Sound to light device



I have just dug out my old but working fine Laser FX sound to light effect.

This needs a mono audio input either line or speaker and its input impedance seems to be around 50K

My Denon DM37DAB has a mono output for a sub woofer I guess.

Can I connect to this device using that? would any harm come to the Denon?

I could add a resistor in the line etc.


Thanks for advice