With high excursion capabilities and low Fs, Dayton Audio's TCP115-4 can produce a surprising amount of bass for a 4" woofer. In addition to its low frequency performance, this driver also performs very well through the midrange, making this driver ideal for use in smaller 2-way designs. Aluminum former keeps voice coil cool for high power handling 1" diameter 4-layer voice coil improves power handling and low frequency response Extended pole piece creates symmetrical magnetic field for lower distortion Cosmetic low-profile mounting flange looks good without flush mounting Powerful motor for efficiency and compact enclosure