What is a U as used in 19" rack configurations? 

This form of measurement has always been associated with 19" rack mounted equipment such as amplifiers, graphic equalisers, professional cd players, dj mixers ...etc. 

This conversion chart will be useful in the construction and installation of equipment racks.

Number of U

Centimetres

Inches

1

4.45

1.75

2

8.90

3.50

3

13.35

5.25

4

17.80

7.00

5

22.25

8.75

6

26.70

10.50

7

31.15

12.25

8

35.60

14.00

9

40.05

15.75

10

44.50

17.50

12

53.34

21.00

14

62.30

24.50

16

71.20

28.00

18

80.10

31.50

20

89.00

35.00

24

106.80

42.00

26

115.70

45.50

30

133.50

52.50

34

151.30

69.50

36

160.20

63.00

40

178.00

70.00

Home
Customer Area
Trade
Products
Special Offers
Buying Online
Resources
Solutions for ...
Audio Technical Information
Audio Glossary - A-Z
Crossovers As Used In Pro Audio Systems
A Simple Guide To Loudspeaker Technology
Gig Guidelines - Sound Engineer Procedures
What is a Unit
Visual Technical Information
Technical Downloads
Links
Contact Us
Customer Logon
www.intergage.co.uk | Web Design in Dorset