This Speaker does not include a sound enclosure
 
The DCCS – 20 mm Round Speaker has incredibly good sound.
 
Suitable for use in: 
Any model locomotive that has provision for the installation of a 23 mm speaker
Any model locomotive that has enough space to fit this size speaker with a separate enclosure.
 
DCCS 20 mm Round Specifications:
Total Size: 20 mm Round
Total Height: 3.8 mm
Impedance: 8 ohms
Nominal Power Rating:0.5 Watt
The speaker is also suitable for use with ESU, Soundtraxx, TCS, Digitrax, QSI, Zimo and MRC sound decoders.
 
Check the decoder's speaker specifications before installing this speaker.