Summary: Unbelievable sub. I have had crazy systems in the past. This sub paired with the alpine 6x8 two ways in four doors and alpine tweeters in the front. All run off the alpine 5 channel v9. I had a custom down firing box built for it that fits UNDER half of my back seat. Wasn't really expecting a lot. Very pleasantly surprised. Super clean and very loud. Most people cant believe there is only 1 sub. Let alone a shallow. Then again it's all alpine.
Summary: Very impressive shallow mount subwoofer. I am NOT a fan of alpine subs normally. This driver is however a cut above the other subs Alpine offers. It is very clean and accurate. It also has very good output. I had a 12 " Rockford p3s in my last truck in a factory spec ported box running off of Rockford power 800.2 bridged. It was great for a shallow sub. Just for fun I tried one of these in the same box and was blown away.
Summary: I have a 2012 Chevy Malibu and had an Alpine SWR-12D4 in a full size sealed box that took up half my trunk space. We've had a new addition to our family and soon realized the box and the baby stuff was not all going to fit. I needed something smaller but still wanted some thump. After reading alot of posts/reviews about shallow mount subs, most spoke negatively and said that they didnt pack the same punch as a full size sub.
Summary: I installed 2 SWR-T12's behind the back seat of my 2005 F250. These thing sound GREAT!! They are being powered by an Alpine MRX-M100 amplifier with an external bass knob. I wasn't sure what to expect because there isn't much info about them and I couldn't find them on display anywhere. The sound quality is amazing, the bass is LOUD and DEEP! I can't believe that they are shallow mount subs, they remind me of my old JL audio W6 12's. I'm extremely happy with my purchase.
Summary: Well I can't say its the company fault but I got a swr-t12 with a cracked magnet / heat sink. So I took pictures never plugged it in and I got to wait a ~2 weeks for it to clear up and got another one. It sounded mediocre (in sealed box of ~0.8cu ft) Powered by a moderate Alpine PDX-M6. Well I set the subsonic to 30hz (very safe). Low pass at 80hz. had head unit volume half way. Gain set 3/4. I pluged in a 33hz test tone and sounded cool.
Summary: I would not even compare this to a standard type r. I bought this for truck. It lasted maybe two months. After it blew on the song Late Night Tip, the speaker was dented. Looked like someone had punched it in. For what this cost on amazon at the discounted price, I should have bought two Sundown Audio SD subwoofers. Probably would even have $ left over. I guess if you listen to soft music this sub is good. But terrible for hip hop rap dance and so on.
Summary: For a thin single 12 inch sub I'm extremely happy with the performance. I installed it behind the seat of a crew cab F350 in a custom made box. I matched it with an Alpine PDX-5 amp on the sub channel, it has plenty of power!