It's amazing to me how many of the most expensive systems showcased here on Audiogon and over on the Asylum are completely devoid of RF-filtration and room treatment. I've seen systems that would cost six figures (even without figuring in the cost of swapping things out over and over along the way), set up in a room with no acoustic treatment and with a CD player parked directly underneath a preamp.
The good news is that there are some inexpensive things you can try. A set of "power wraps" on the power cords and interconnects for the CD-player and preamp would be a good start. If you hear an improvement you can move on to other forms of shielding. Also, if you don't already have room treatments, try listening with small throw pillows taped in the front corners of the ceiling. You won't like the midrange, but if the high-end sounds more like what you're looking for, you can proceed to purpose-built tricorner traps by a number of vendors such as ASC and RealTraps.
Good luck.
The good news is that there are some inexpensive things you can try. A set of "power wraps" on the power cords and interconnects for the CD-player and preamp would be a good start. If you hear an improvement you can move on to other forms of shielding. Also, if you don't already have room treatments, try listening with small throw pillows taped in the front corners of the ceiling. You won't like the midrange, but if the high-end sounds more like what you're looking for, you can proceed to purpose-built tricorner traps by a number of vendors such as ASC and RealTraps.
Good luck.