Add to Cart Quick view 01564-06 D1 Spas SIS 8" Subwoofer (no box) Dimension One Spas MSRP: Now: $88.50 Was: 01564-06 D1 Spas SIS 8" Subwoofer (no box) Replacement 8" Goldwood GW-8PC/4 Subwoofer for SIS Stereo. Woofer only - does not include box. 01564-06 MSRP: Now: $88.50 Was: Add to Cart Quick view