Romans828: It would be nice if Rythmik increased its amplifier warranty. However, amplifiers, if they are going to go bad, will usually do so earlier instead of later. All companies will have a certain percentage of amplifiers that go bad. Rythmik subwoofers are extremely well thought of and is a top tier I.D. company. They make amazing products.
I own an SVS SB13-Ultra and can say it is a marvelous subwoofer, especially for music (which is why I purchased it). The customer service from SVS is top tier all the way, and dealing with Ed Mullen was a pleasure. Can't say enough good things about Ed and SVS.
Not surprisingly, I also own a PSA XS30 subwoofer, which I feel is a powerhouse for movies. The new versions of all their subs, the "se" versions, take them to a new level. Tom Vodhanel was the "V" in SV Sound, so no one knows SVS better than Tom. He designed many subwoofers for SVS before creating his own company and was one of the main reasons I chose PSA. The customer service from PSA is also top tier, and like Ed Mullen, Tom was a pleasure to deal with. When I stumbled and my knee hit the edge of the grille panel and broke the plastic seating dowels, Tom sent me a new grille, plus dowels and instructions to repair the old one (so I'd have a backup if needed). No charge. Now that is customer service!