I have a technics sa ex 140 (stereo reciever)which has no sub output. I hear that there is another way by connecting the speakers to the sub then the sub to the reciever. Will this distort the sound? What features does the sub need to do that? What other features should I look for in a sub, my room is small so I was thinking of around 100 watts maybe 75 at the least. I'm 15 so I'm on a $100-130 budget for my subwoofer. My current set up consists of 2 Klipsch Heresy speakers(step dad gave them to me), my stereo reciever, and graphic equilizer. Eventually I want to replace the stereo reciever with a 5.1 channel sourround sound one, with a pair of rear channel speakers and a center channel one, along with my sub.