Bad power killing electronic equipment

[Arrow_Raider]

I moved out of my parents' house into an apartment last fall. Since then, I have had many electronic devices work improperly or completely fail and break.

Throughout the year, the following has happened:

• Router and cable modem would often stop working and have to be rebooted daily
• Printer would often become unresponsive and need to be rebooted daily
• Old computer speakers began crackling and hissing
• New computer speakers frequently emit a very loud pop noise once or twice every hour. (NOTE: Only emits popping noise when they are plugged into desktop. Haven't tried plugging them in a different computer, but when they are not connected to a computer at least, they do not pop)
• xbox 360 died
• Laptop power adapter cable melted a little bit
• Power supply died in my primary desktop

I can blame the xbox 360 death on Microsoft's shoddy design, but the rest of the problems don't seem to be just coincidences.

My guess is that the building has bad, irregular power. A couple months ago I bought two voltage regulators (APC LE1200 http://www.amazon.com/gp/product/B00009RA60). Since then, all of my computer equipment, lcd tv, game consoles, router, modem have been behind the one of the voltage regulators.

This has had the following effects:

• Router and modem still needed to be rebooted daily. A month ago, I replaced the linksys firmware on the router with DD-WRT. Router and modem hardly ever need to be rebooted now.
• Printer rarely needs to be rebooted.
• New computer speakers still emit loud pop noises just as frequently.
• Desktop power supply just died this morning, so that occurred *after* the voltage regulator had been in place.

Here are my thoughts:

• Router with crappy linksys firmware was causing itself and the modem to stop responding. Maybe power issues before voltage regulator corrupted the firmware? I didn't try reloading the linksys firmware since I am very pleased with DD-WRT and its features.
• Regarding desktop power supply: Dying power supplies are not uncommon, and damage may have been done in time before the voltage regulator was put into place.
• Speakers: I threw the old ones in the trash a while ago, so I can't test them now. But I think the damage to them was permanent anyways. I don't know what the popping is caused by. Could be that the failing power supply in the desktop was spiking power in audio signal.
• xbox 360 failed before I had the voltage regulators for what that is worth.
• Laptop adaptor cable melting occurred a couple weeks ago, so after the voltage regulators had been in place. However, I would sometimes charge my laptop upstairs without being behind one of the regulators. Also, this particular adapter has been reported to have melting problems by other consumers.

Something that may or may not be significant:
My voltage regulators show when input power is below, at, or above normal voltage levels. The are hooked up to two different walls, but one typically shows that input is above normal levels, and the other typically shows input voltage is at normal levels. The building has an elevator and often when I hear it start moving, one or both of my regulators will emit a click sound, indicating that input voltage just went up or went down. A few minutes later, it/they will click again and return to the previous state. When the refrigerator condenser turns on, that will also sometimes trigger a click in one or both of the regulators.

This is probably not related to the power problems:
In the winter, my RAM and a harddrive in my secondary desktop began failing and I replaced them.

I don't really have a specific question, but just looking for other people's thoughts and suggestions.