I currently have a Jolida JD1701 Hybrid amplifier with LSA 0.5 bookshelf speakers hooked up to my Pure I20 ipod doc station playing apple lossless files. I recently added a known good Infinity powered 12" sub using RCA connections. This sub really put out a lot of bass in a much bigger room. Now I can turn the sub volume all the way up along with the sub filter opened up and still the bass is hardley noticible. It is as if the RCA output coming out of the amp is turned all the way down. You can also run the speaker wires into and out of the sub as a means to avoid the RCA's but I would prefer not to do it that way. Any suggestions?
I do have the RCA's connected to the variable output as opposed to the fixed on the amp. I guess I dont know where to start to fix the problem. Could it be the factory china tubes in the amp lacking bass output? This is my first hifi gear, do these systems not put out much bass? Any suggestions?