![Amazon.com: Victrola Premiere S1 Powered Subwoofer, 6.5" Front-Firing Woofer, 6.5" Passive Radiator & 70W Built-In Amplifier, Wireless Subwoofer with Bluetooth 5.0, Works with Premiere V1 Soundbar Turntable : Electronics Amazon.com: Victrola Premiere S1 Powered Subwoofer, 6.5" Front-Firing Woofer, 6.5" Passive Radiator & 70W Built-In Amplifier, Wireless Subwoofer with Bluetooth 5.0, Works with Premiere V1 Soundbar Turntable : Electronics](https://m.media-amazon.com/images/I/61zi0sg2l8L._AC_UF1000,1000_QL80_.jpg)
Amazon.com: Victrola Premiere S1 Powered Subwoofer, 6.5" Front-Firing Woofer, 6.5" Passive Radiator & 70W Built-In Amplifier, Wireless Subwoofer with Bluetooth 5.0, Works with Premiere V1 Soundbar Turntable : Electronics
![Powered subwoofer makes a knocking sound every 5-10 seconds once plugged into power. Not plugged into AMP. Sub is YST-SW100. : r/audio Powered subwoofer makes a knocking sound every 5-10 seconds once plugged into power. Not plugged into AMP. Sub is YST-SW100. : r/audio](https://external-preview.redd.it/4catsgKB7NPYY6TpyeOA2TP-HABo0SpHe5qEl3PwRnU.png?format=pjpg&auto=webp&s=6c30a0501a7490f499ca71c47b0468a34a5bfd5b)
Powered subwoofer makes a knocking sound every 5-10 seconds once plugged into power. Not plugged into AMP. Sub is YST-SW100. : r/audio
![LTC - LTC SW100 Subwoofer Actif 25cm (10"""") Caisson de graves 100W Noir Ltc - Enceintes Hifi - Rue du Commerce LTC - LTC SW100 Subwoofer Actif 25cm (10"""") Caisson de graves 100W Noir Ltc - Enceintes Hifi - Rue du Commerce](https://www.rueducommerce.fr/medias/baf3658ea03b3f88b980e89ac2046af5/p_1000x1000/10000379-1-title-ltc-subwoofer.jpg)