I have afew things to ask plz;

I want to get a Discman, but i didnt understand whats this “Frequency response: 20 to 20,000 Hz (+1, -2 dB)”
and what is the diffrents between discman with “Psyc” and discman without “Psyc”?..

and 1 more thing plz… whats is better?

http://www.sony.co.uk/view/ShowProduct.action?product=D-NF420&site=odw_en_GB&pageType=Overview&category=PAW+CD+Walkman

or