The Soundtube CB5 speaker's patented three-way design that includes a 5" dual-chamber, band-pass subwoofer, a 4" woofer and a.75" tweeter all in one small unit. The combination of small form factor and full-range audio performance equals faster installation times because you need to dig only one hole for every two, you would normally have to dig with a standard landscape audio package! So you're running less wire and making less splices now too, there is no separate subwoofer amp needed with Cherry Bombs.