- Subwoofer(s) (I think I lost close to a thousand bucks now buying and selling them. *sigh*)
- Audyssey (XT32 and DynamicEQ) (They work great on a low end system, on the high end they totally do not work)
- Use more than 1 circuit (if the components are electrically connected with each other)
- CFL injects massive amounts of noise (Get a power line noise meter from Alpha Labs, on my base power line noise of 200mV, 1 CFL added 50mV, while another one adds 200mV!)
- The bigger the room the better it sounds.
- 2 Floorstanding speakers
- XLR interconnects
- Basic power strip only
- Balanced power (this is the key)
- Ground everything
- Check house ground resistance
- Bi-wire is better than single wire (if the speaker supports it/has 2 crossover boards)
- Try corner placement with 45 degree toe-in
- Go for low gain amplifiers
- Go for high efficiency speaker designs (you really need this if you listen mainly to instrumentals)
- Spike the speaker into the ground, ideally this is part of the speaker design.
- Space equipment far apart from each other. Use a magnetic meter (Trifield) to help guide you.
- jplay, if you ever had the PC music doesn't sound quite right issue, jplay will fix it.
- Linear power supply (previous one I had did not have proper grounding)
- Power conditioner/noise reduction device (noise reduction device should be used before a balanced transfomer, otherwise it will kill dynamics)
- Things that work for the high end (but does not matter at the low end) tend to have detractors. Use that as a guide.
http://www.belden.com/blog/broadcastav/Ground-Loops.cfm (lifting the ground turns the cable into frequency filters)
My current audio system: Directstream DAC -> Pass Labs XA30.8 -> KEF R700
PC source: Foobar2000 + ASIO -> jplay -> Peachtree X1 -> optical