SOUNDTUBE Speaker: White, 20 W Max., 88 dB Sensitivity, 16 ohm Impedance, 5 in Woofer Dia. - 443D20|RF-41-20-SG-WH - Grainger
Price history & Review on HF-102 HiFi Speakers 33 Inch Super heavy Subwoofer Bass Speaker Unit Loudspeaker HIFI Speaker 16Ohm | AliExpress Seller - Queenway Store | Alitools.io
2x Harmony Ha-p18ws16 Raw Replacement 18 Pro PA 1200w Sub Speaker 16 Ohm Woofer for sale online | eBay