![]() ![]() Speaker cables have far stronger signals traveling along them, so they shouldn’t be as affected by RFI. ![]() Note that I’ve seen much cheaper on Amazon, but not from a known vendor, so I can’t vouch for them. It’s about $500, but you can easily get away with a lower wattage (500 or 250) model for less than $250. Tripplite sent me one of these as well: the excellent 1000-watt IS1000HG (Hospital Grade) with four outlets. Slightly cheaper than an online UPS, but absolutely effective against all kinds of line noise is an isolation transformer. If you’re not worried about defeating ground-loop noise, you can get away for not much more than $100 with a UPS that advertises pure sine wave output. It’s also much less-expensive than one of those high-end power conditioners you see marketed to gullible audiophiles. It costs several hundred dollars less, but doesn’t provide battery backup power.Ĭondition your power with the Tripp Lite IS1000HG isolation transformer The Tripp Lite IS1000HG isolation transformer I mentioned earlier will also clean up AC line noise. But darn if it isn’t 100 percent effective at providing protection against power surges and outages. It’s also heavy, about the size of a small dehumidifier, and it has some features (such as USB monitoring, so that it can gracefully shut down an attached computer in the event of a power failure) that have nothing to do with noise elimination. That device was selling for nearly $900 when I updated this article. Tripp Lite sent me its model SU1000XLCD UPS to clean up the super-dirty AC in my apartment. Line interactive UPSes are more expensive than the standby alternative, which keep switch to battery power on demand. This type of ground loop isolator, for coaxial cables used with over-the-air antennas and cable- and satellite-TV equipment, can eliminate both visual and audible noise. ![]()
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