R121 Single 21" Bass 

R121 Single 21" Bass
LF driver :21"
Sensitivity 103dB
Rated power:2000w RMS, peak: 4000W
Normal impendance: 4ohm/8ohm
Frequency response 45-1500HZ(+/-3dB)
Connectors 2xspeakon NL4 N.W. 72kg 
Finish: high quality plywood with purple color finish
Dimension: 852*886*582mm

The R121 provides outstanding bass performance from a moderately sized enclosure making it the bass of choice for many diverse applications. 
Similar in output power to an R218, this single 21” version of the R221 can be used with virtually all mid-high loudspeakers to great effect.
The advanced loading and driver design of this high-efficiency product provides audiences and crowds around the world with stimulating and satisfying experiences. 
The R121 comprises a horn-loaded and very robust designed 21” driver with 6” voice coil and Neodymium magnet. 
Available in 4 Ohm or 8 Ohm versions with optional wheels, throat grill and pole mount.