The Marty Sub thread https://www.avsforum.com/forum/155-diy-speakers-subs/1648673-martysub-faq.htmlHi
I'm upgrading my HT system, and was going to buy 2 12"polk subs, but decided to build my subs.
I'm can build a 22"x22"x20" box, room is about 23x16, I'm debating between a 2 Dayton Audio DCS450-4 18" in a sealed box, or 2 12" in ported box (haven't decided subs yet) you can suggest a sub the 12" sub.
I'll use a NX1000D for amp.
With subs should work better, it will be used 90% HT and 10% music.
recommends ONE of this driver for that size (Micro Marty) box. https://www.parts-express.com/dayton-audio-rss390ho-4-15-reference-ho-subwoofer-4-ohm--295-469