To get your record deck to work with your Denon you will need to purchase a Phono pre amp to boost the low signal produced by the phono cartridge. The pre amp plugs into you amp via the phono cables, you will then be able to use you record deck. Depending on the quality of your record deck and crtridge, the more you pay, the better the quality you will get, Fitting a hi quality pre amp to a crap record deck and cartridge will only make it sound worse, garbage in, garbage out.
Homer
November 2010