A great neo mid-bass driver, for the price. High 3rd order HD in the midrange due to the cone breakup limits its usage. The small magnet is great for tight installs.
Dayton Audio ND140-4 5-1/4" Aluminum Cone Midbass Driver 4 Ohm
Nearfield FR & Impedance
CSD & Burst Decay
Non-linear Distortion (90dB/1m equivalent)