Systems ListDIYB&C 21SW152-4 Sealed

System typeSealed
DriverB&C Speakers 21SW152-4
Driver Size21 "
Number of drivers1
Internal volume4.5 ft3
External volume6.12 ft3
Dimentions (Width Height Depth)23 " 23 " 20 "
Weight87 lbs
Aprox. Price$950 USD


This system is a single 21SW152-4 in the 4.5 cubic foot 23x23x20 sealed test enclosure. Again the big B&C driver reinforces its strengths as mechanical ruggedness, sensitivity, clean upper bass response, low distortion and high thermal power handling. This driver is intended to be used in high power bandwidth limited, vented, horn and band pass devices and is more at home there but a good driver is a good driver and it can work well in a small sealed enclosure as well with some signal shaping to shelve down the top end some. In a direct radiating system such as this it could easily be used up as high as 400Hz if needed. The SD of the 21 cone helps provide decent low bass output despite the modest xmax rating though it wont compete with the top extra long stroke drivers in that department. Once the bass is up into the more typical music range the output peaks available with even a modest amplifier are generous to say the least.