Product* links: Subwoofer: https://parts-express.sjv.io/oe95bO (save 5% with the code DIY5) Exclusive Discount Codes for DIY Audio Guy fans: 7% off of Savard (https://www.savardspeakersystems.com/?afmc=DIYAudioGuy) with the code DIYAUDIO 10% off at NVX.com (https://nvx.com/?ref=n_3Nr6MdZIar-d) with the code DIYAUDIO10 10% off of Custom Speaker Pods (https://customspeakerpods.com/) with the code DIYAG 5% off from Battery Hookup (https://batteryhookup.com/) with the code DIYAudio 5% off at Parts Express (https://parts-express.sjv.io/3PGnNr) with the Code DIY5 10% off at Jag35 (jag35.com/DIYaudio) with the code DIYAUDIO In this video I provide examples of how box volume, tuning frequency and port cross section impact the length of your subwoofer's port. Watch this video and you will understand everything that determines your port length. Support DIY audio content by shopping with these affiliates: Amazon: https://www.amazon.com/shop/diyaudioguy Shop for Car Audio at NVX: https://nvx.com/?ref=n_3Nr6MdZIar-d Shop for Basshead Gear at Down4Sound: https://lddy.no/1065t Shop for Car and Home Audio at Crutchfield: https://howl.me/cg9bCOKLoK7 Shop for Car Audio at Sonic Electronix: https://bit.ly/3bazPBs Shop for speakers at Parts Express: https://parts-express.sjv.io/0J6eYE Shop for whole-house auido at Arylic: https://www.arylic.com/?aff=79 DIY Audio Merch: null Chapters: 0:00: Box Volume vs Port Length 5:48: Tuning Frequency vs Port Length 9:01: Port Cross Section vs Port Length *As an affiliate marketer I may earn a small commission when you make a purchase at parts express.