The Denon RMR2113 Rack Mount Kit is designed for the following models: X2500, X2400, X2300W, X2200W, X2100W.
Denon RMR2113 Rack Mount Kit 
The Denon RMR2113 Rack Mount kit is designed for the following Denon models:           
DEN-AVR-X2700
DEN-AVR-X2500
DEN-AVR-X2400
DEN-AVR-X2300W
DEN-AVR-X2200W
DEN-AVR-X2100W
DEN-AVR-2113CI