Amp rack
Amp rack is short for amplifier rack, and is a term used mostly in reference to professional audio applications to describe any furniture, fixture, or case where amplifiers are mounted by their faceplates or in slot grooves, which is termed a "rack mount". 

A 19-inch rack is the most common standardized frame or enclosure for mounting multiple electronic equipment. Each piece of equipment has a front panel that is 19 inches (48.3 cm) wide. The 19-inch dimension includes the edges, or "ears", that protrude on each side, which allow the amplifier or other electronic equipment to be fastened to the rack frame with screws. 
Q211554
amplifier
Concept
Q7248058
professional audio
Concept
Q431000
19-inch rack
Concept
Q4748029
Amp rack
UNK
+19^^http://www.w3.org/2001/XMLSchema#decimal
19
NUMBER
+19^^http://www.w3.org/2001/XMLSchema#decimal
19
NUMBER
+48.3^^http://www.w3.org/2001/XMLSchema#decimal
48.3
NUMBER
+19^^http://www.w3.org/2001/XMLSchema#decimal
19
NUMBER
width