Audio Professionals Limited - 12 inch subwoofer box tuned to 25Hz, for a Rockford Fosgate P3 | Facebook
Going Deeper: 25 Hz Is The New 50 Hz - ProSoundWeb
ADIUM Subwoofers Speaker, 3W Subwoofer Wooden Cavity 25Hz-20KHz 3.5mm Interface Good Sealing for Music Price: Buy ADIUM Subwoofers Speaker, 3W Subwoofer Wooden Cavity 25Hz-20KHz 3.5mm Interface Good Sealing for Music Online in
12 Inch Auto Speaker Stamp Steel Basket Car Audio Norminal Power 500 Watts Loudspeaker 25Hz-500Hz Square Subwoofer - China High Power Subwoofers, 10inch Subwoofer | Made-in-China.com
POWER-FL12-II Phase Technology 12 inch Subwoofer with Passive Radiator/25Hz -150Hz
Current Audio FLSUB-8B 8 inch Floor Subwoofer /Black / 25Hz-200kHz | eBay
POWER-FL12-II Phase Technology 12 inch Subwoofer with Passive Radiator/25Hz -150Hz