It's a nice feature for A/V system integration since you can plug in unseen in the back and it's very reliable. Otherwise, you have to add stick-on IR microflasher on the front where ever the IR eye is. The microflasher can get knocked off or fall off due to heat.
http://www.nilesaudio.com/docs/productSheets/Series20IR_Cutsheet.pdf
http://www.nilesaudio.com/docs/productSheets/Series20IR_Cutsheet.pdf