I enjoyed the deep bass with the subwoofers 'SA-SW3' and 'SA-SW5' that can be incorporated into Sony's audio system without any settings. - GIGAZINE
Sony SA-SW3 optional subwoofer for HT-A9/A7000 provides dramatic sound with 200W of bass » Gadget Flow
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Subwoofers | SA
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Sony SA-SW5 optional subwoofer for HT-A9/A7000 gives you powerful, booming sound » Gadget Flow
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SA-SW3: Wireless Subwoofer for HT-A9/A7000
