Sonance - R12SUB - Reference 12" Passive In Wall Subwoofer (Each) - Paintable White - Open Box - Excellent

Hi, Thanks for your question. For the Sonance R12SUB, the cutout (opening) is 12.97" x 12.97", per the CAD drawing. A couple of important notes that are easy to miss: This subwoofer requires the matching in-wall enclosure (R12SUB ENC), which is sold separately. For your convenience, I’ve included links to the CAD files and Quick Start Guides for both the subwoofer and enclosure below. Sonance R12SUB Enclosure Best Buy SKU: 5704008 CAD File: https://images.salsify.com/image/upload/s--MwP-yfQA--/efw3jm168qa1bnnmba90.pdf Quick Start Guide: https://files.bbystatic.com/DcB4J8rgWv2zDFtPzv1uKQ%3D%3D/505464f5-7024-4ac7-b0b6-ac161a0a4b6f.pdf Sonance R12SUB Best Buy SKU: 6253942 CAD File: https://images.salsify.com/image/upload/s--D_vWqpkX--/tg34e3gumgef4orzfhab.pdf Quick Start Guide: https://files.bbystatic.com/2p4eFtI7SSSytHpfIvZBKA%3D%3D/d93a8533-cb1c-47f8-8202-366d6ea99b1e.pdf If you’re looking for an in-wall subwoofer that does not require a separate enclosure, take a look at the Sonance VPSUB (Best Buy SKU 6253955). This model has an integrated enclosure, making installation simpler. I hope you found this information helpful. If you have any additional questions, feel free to reach out to our California-based support team at 949-492-7777. We’re available Monday through Friday, 6 a.m. to 5 p.m. PST, and happy to help! – Sonance Tech Support Team

Hi, Thanks for your question. This subwoofer is part of a system that requires the use of an in-wall enclosure. You can view the Reference 10" Sub Enclosure here: https://www.bestbuy.com/site/sonance-reference-10-in-wall-subwoofer-enclosure-each-black/5704004.p?skuId=5704004 I would also recommend using our amp to properly power the subwoofer. You can view the Sonamp DSP 2-150 MKII amplifier here: https://www.sonance.com/electronics/amplifiers/dsp If you have additional questions, or if you would like some assistance selecting the right Sonance product, please call our California-based support team at 949-492-7777 and ask for Tech Support. We are available Monday - Friday, 8 AM to 5 PM PST. We will be happy to answer all your questions. - Sonance Customer Support Team

This subwoofer does not have a built-in amplifier.

This in-wall subwoofer uses a banana jack/screw terminal connection type.

The minimum frequency response of the subwoofer is 25 hertz.