Speaker SB Acoustics SB42FHCL75-6, impedance 6 ohm, 15 inch
3300059 6" Paper Cone Woofer 6 Ohm
Amazon.com: CHOOYO 6.5 Inch Subwoofer Audio Speaker 80W 4 8 Ohm High Power Fever Woofer Music Loudspeaker DIY for Bookshelf Sound System (Color : 8 Ohm) : Electronics
PW-001 8 Inch 10 Inch Subwoofer Dedicated Unit Silver Gray Professional Paper Cone 230w 6 Ohm (1PCS) - AliExpress
6-1/2" Poly Cone Midbass Woofer 4 Ohm
Amazon.com: ASHATA 600 Watt Car Subwoofer, 6 Inch Car Speakers, 4 Ohms Car Subwoofer Loudspeaker Midrange Coaxial Speakers Black for Car Audio Systems : Electronics