$29 On-Stage Subwoofer Adapter

Updated August 24, 2026

This auction ended on August 29, 2026. See upcoming auctions from Mad Bids Brampton.

Lot number	617
Auction	Mad Bids Brampton - Overstock, Electronic, Return Freight 50
Date	August 29, 2026 at 3:00 PM EDT
Auction house	Mad Bids Brampton
Location	Brampton

Brand: On-Stage Condition: Open Box - Not Tested In Packaging?: Yes Assembly Required?: No Damaged?: No Functional?: Yes Missing Parts?: No Star Rating: 0.0 UPC: 659814140732 Title: $29 On-Stage Subwoofer Adapter The On-Stage SSA21 Subwoofer Adapter's female M20 threading attaches to M20 speaker shafts to accommodate virtually any subwoofer on the market, utilizing both removable M20 threading and a tapered, steel-lugged lower section to accept 13/8" cups. Whether it is a shallow M20, recessed M20, 1 3/8" cup or 1 3/8" cup with M20, the SSA21 will fit subwoofer. Highlights: Application: Subwoofer adapter with removable M20 Weight Capacity: 100 lbs. Upper Adapter: Accepts male M20 Lower Adapter: Tapered to 1 3/8" with removable M20 to fit all subwoofers on the market Includes: Allen key for M20 lug removal Construction: Steel Specifications: Dimensions (Overall): 1.6 inches (H) x 1.62 inches (W) x 7.47 inches (D) Weight: .92 pounds Holds up to: .92 pounds Electronics Condition: New.

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