Yamaha Subwoofer
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Edinburgh

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Yamaha Subwoofer System Yst-sw 150

Exclusive Yamaha System Allows The Amp And The Speakers To Work Together To Boost The Power Of A Stereo Speaker's Output. Instead Of An Ordinary Woofer Unit, The Speaker Has A Helmholtz Resonator That Intensifies The Sound Waves Inside Until They Are Output As Much Stronger Sounds. Total Impedance(resistance To Current Flow) Has To Be Zero, So The Amp's Circuitry Produces Negative Impedance, Canceling Out The Speaker Impedance. The Result Is Bass Sound That Is Very Powerful.

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