Hi Curtis, thanks so much for your amazing feedback! We're thrilled that you're interested in using your AirFly Pro 2 with your Denon stereo receiver - it means the world to us to hear from customers like you!
Yes, AirFly Pro can connect to a Denon receiver with a 1/4 inch input using a simple 3.5 mm to 1/4 inch adapter. Just be sure you are plugging into a line level input such as AUX or Line In rather than a turntable phono input, since phono inputs are amplified differently. Once connected, AirFly Pro will send clean, wireless audio to your Bluetooth headphones or speakers with no extra setup required.