Why aren't you worried about the TV? It has circuits that are sensitive to spikes, same as the rest of the equipment. Best practice- kill surges at the service entrance, kill them at the equipment locations and make sure the each AV system in on the same circuit(s).
Milliseconds is a long time when it comes to surges. Look for something that works in microseconds or nanoseconds. Make sure it shuts off at a reasonable over/undervoltage point, too- the one in the link shuts off below 100VAC and above 140VAC.
Like this-
MR4300 Power Management MR4300 model has 9 outlets and is designed to provide protection, filtration and monitors your energy distribution. Get it today!
www.panamax.com
I guess I was a little vague.
The TV is connected to a surge protector. I was always planning on adding a UPS, as the TV takes some time to turn back on after a power outage (the apartment generator takes a few minutes to kick in). When I said I am not worried about the TV, what I meant was that I am not concerned if it would work on a line interactive stepped approximation UPS or not (I am quite certain it would).
Now to the original question. To protect the new audio equipment, I considered the following options :
1) Use a
single phase servo stabilizer. This will clean out the mains issues. My dealer told me that loosing power abruptly can also damage the woofer/AVR. Is this true ? If not, I prefer this option. It would be the cheapest.
2) Use a
UPS :
a) Line-interactive step approximated sine wave : If the AVR/Subwoofer won't be affected at all by operating on a step approximated sine wave for the few minutes it will be on the UPS (until power comes back on or I shutdown the system properly), I'd be more than OK getting a line-interactive step approximated sine wave UPS. This would cost me around the same as option one.
The switching/transfer time of these line interactive UPSs are usually in the range of 6-10ms. My desktop computer, TV etc won't have any problem with this. Will an AVR be OK with it or is the 6-10 ms transfer time too long ?
b) Line-interactive pure sine wave : If step approximated sine wave is not acceptable, this is the next option. Should cost more. The switching/transfer time query is valid for this option as well.
c) Online pure sine wave : I am assuming that this is the best option ? Proper mains isolation, pure sine wave, no switching/transfer interval. Most expensive option.
Suggestions ?