I have Simple Audio Listen speakers. I got them, new on ebay, for $60, vs the $500 list. Unfortunately, no longer available.
I had a pair of the HF1800A's for about 4 years, all and all sound quality was decent. Recently my passive speaker (the right side in my case) has all but failed out right, where it would pop and crackle, eventually settling to a very loud hiss in relation to the audio that it was still outputting. I was also getting a lot of cross talk and interference from the various electronics I have around them, getting worse over past last year.I bought a cheap pair of Genius SP-HF1800A wooden speakers because I wanted separate bass and treble controls. These things are massive and look great if you have a large monitor. They have separate bass, mid and treble drivers and put out very good sound. The downside (and the reason they are cheap) is that the quality control appears to be poor and many report them failing. I have had mine almost 2 years and the right speaker does sometimes cut out but it works after I power it off/on. The only alternative speakers I was considering were the Creative T40 at 2-3 times the price.