Originally Posted by Porn_Star
What's your take on them? I mean, I don't get it. You end up getting around 169 volts peak at 60hz, all your audio stuff converts that to dc before running it through variable frequency to create different tones from the speakers right? So what's it matter what kind of 1 or 2 volt difference you may, or may not get ac side wise?
Originally Posted by Reefdvr27
It has been debated before and just one of those things if you want it or not. Not to start another debate, but it is said that you should not plug your amps into them as you can hold them back. That's not from me, but from what I read. I myself bought a Panamax 5400 for clean even power. I also ran my cable through to help with any cable noise.
The reason it is recommended to not plug heavy amps into these devices is because they have the ability to draw more current than the power protection system can handle and will blow the power protection device's fuse. The majority of power protection devices are rated at 15 amps. This forces you to plug amps directly into the wall where they ostensibly have *ZERO* protection from any spikes and surges.
You might say "well, that's OK because the rest of my equipment is protected."....when in reality it is not. A surge can go through the amp and take out other equipment connected to the amp, like the preamp and therefore all the source equipment as well. There are instances where power has come through unprotected coax cable into a power protected system and destroy all the connected equipment in the system.
In short, if you use an AVR or have a single traditional multichannel amplifier, I'd get the 20A power protection device and put everything on it. There's little chance you'll ever draw anything close to 20A until your system gets fairly elaborate. Many of the mid-sized systems may pull 14-16 amps, even with powered subs connected to the same device. If your plan is a larger system with multiple heavy duty amplifiers or a distributed AV system with lots of equipment in common racks, I'd recommend you upgrade to an isolation transformer which is the only device that has the extra current physically stored in the device to handle ALL the equipment at the same time, including the heavy amps. Yes, these things promote filtering and voltage regulation but, like Jautor, it's not top at my list of features. Having sufficient current available to cover peak current draw spikes is most definitely the feature to have for a larger system. Think Torus, Richard Gray, Equitech.
A compromise would be to install a quality surge/lightning protection device at the panel and then plug the amps into the wall directly and everything else on a power protection device. Like BIGMouth says, find a way to integrate a UPS either inherently in the protection device or as a separate unit plugged into the power protection system so you can execute a cool-down power off sequence if the power goes out. I also like to plug my DVRs, network items, digital phone system, automation system and a handful of other key devices where a momentary power blip would be annoying and cause a delay to 'reboot'.