Until we released our PCS series choice was limited when it came to high-performance in-wall or in-ceiling subwoofers. In fact the only things those other brands excited were wall vibrations - not a good thing in a custom subwoofer. PCS subs gave you real choices for real bass performance. Our in-wall PCS-82SQ sub gives you even more! Typically we suggest a minimum of two PCS subs be used in each system but the more the better! For all the reasons why check out our PCS sub section of the site. PCS-82SQ is an animal of a different nature. In one subwoofer two high-performance 8" woofers do the job of two regular PCS subs. For those with limited space it is the ideal solution twice the bass in half the space.