Reference Home Theater Reviews the SB-4000 Subwoofer

"The SB-4000 does exactly what I want in a sub: make my speakers sound like they play down to 20Hz without any effort or strain by completely disappearing. It offers the same level of impact that I’ve heard at live concerts…and it has helped me discover how much deep bass I was missing from everything. A wonderful sub and highly recommended."
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Sep 6, 2019