Quality sound processing is necessary for those who want the most out of their car audio system. Bass Xtreme amplifiers offer similar sound processing options by including the functions of a Bass Reconstruction Processor. Bass Processor boosts lower frequency harmonics that have been compressed or removed from today’s music recordings and are commonly added in-line before subwoofer amplifiers. Dial in the exact sound you want by tuning the frequency to boost, then increase the bandwidth range from that frequency to stimulate the harmonics around it. After slight adjustments, your audio system can sound like audio professionals have tuned it. Unlock and restore the bass from any system with Bass Xtreme Amplifiers. ** Bass Reconstruction Processor Built-in for Monoblock Models Only (Excludes BXT4.2000, BXT2.1200)