ACTIVE SUBWOOFER BLACK FINISH ONLY 250 W - FRONT FIRING LONG THROW 10" DRIVER - DIGITAL AMP 

High performance subwoofer with Yamaha's latest technologies, including PWM Digital Drive Amplifier, Advanced YST II, Linear Port and front-firing design resulting in dynamic power of 270W and incredible sound clarity.

MAIN FEATURESAdvanced YST II (Yamaha Active Servo Technology II)
PWM Digital Drive Amplifier
Front-firing active design
Linear Port for minimizing extraneous noise
High 270W dynamic power
25cm (10") long-stroke cone driver with magnetic shielding
20–160Hz frequency response
Other Notable Features
20–160Hz frequency response
Auto standby with sensitivity selector (High, Low and Off)
Phase control (Normal or Reverse)
The Subwoofer: a Vital Part of Your System
DVDs and digital music sources hold a huge amount of audio data, including a considerable amount in the low frequency range. Multi-channel sound formats dedicate an entire channel to the low frequencies (the ".1" in 5.1-channel sound), used to deliver the bass in music and explosions, thunder and other low frequency sound effects in movies. Ordinary speakers are not large and robust enough to handle these frequencies, especially for long periods. This is where the subwoofer comes in. By outputting bass sounds with high power and low distortion, it ensures that you are not missing anything, and it also makes the overall sound richer and properly balanced. A subwoofer is thus a vital part of any home theater or even music-focused system.