Though the A-525CC can be used without a subwoofer it is ideally suited for use with a subwoofer. When setting up the A-525CC speakers with a subwoofer in a home theater application we recommend the following receiver settings:
Subwoofer (Low Pass) cutoff: 70-110Hz
Main, Center, and Surround Speakers: 80-120Hz (small or mid size speakers)
A higher crossover frequency will allow the
A-525CC speakers to play louder without overdriving its 5.25" woofers but the upper bass response of the system may diminish depending on the rate of roll-off. These upper bass frequencies can be reproduced by the subwoofer but the bass may sound detached if the subwoofer is not placed in close proximity to the main speakers. Every system and environment is unique; experiment to determine what works best in yours.