Electrical query

Sequoia said:
Probably .... but with unspecified amplification involved, it isn't necessarily the case.

Hifi specs can very misleading. It depends exactly what they mean by that. My main hifi amps are rated at 150w into 8 ohms, and as monobloc amps, there are two of them. EACH has a 3.5KVA transformer. The big brother to these has two 2.5KVA transformers per mono amp, and if you want to drive those hard into tricky loads, household mains isn't adequate ..... let alone a single power point. They want supplies of the order of 400v at 15 amps to drive it.

Now, these are not your standard hifi amps, but it makes the point that even a single high-end amp is capable of drawing down substantial power requirements. On the other hand, many amp manufacturers use misleading claims (like PMPO measurements) to make their products seem, on a spec sheet, more powerful than they are.

Adam_151 is probably right. But if that amp is delivering proper power to hard-to-drive loads, well, ..... :(

Haha Sequoia, just when I thouight it was all hunky dory you go & throw a spanner in the works. :p
Well, at the minute it isn't driving anything more than a set of Grado headphones. It's an old amp I've had for maybe the guts of 15 years or possibly longer, a Technics SU-A900mkII. I have a set of Mission speakers about the same age that aren't even connected but when they are up & running it's at low volumes, I never push them hard. I'm not sure if that makes any sense regarding the electrical point of view.
 
Tachyon said:
Haha Sequoia, just when I thouight it was all hunky dory you go & throw a spanner in the works. :p
Well, at the minute it isn't driving anything more than a set of Grado headphones. It's an old amp I've had for maybe the guts of 15 years or possibly longer, a Technics SU-A900mkII. I have a set of Mission speakers about the same age that aren't even connected but when they are up & running it's at low volumes, I never push them hard. I'm not sure if that makes any sense regarding the electrical point of view.
Sorry about that, Tach. :)

It probably is all hunky dory. The amps I'm talking about are certainly an extreme.

And in my non-qualified, amateur opinion, your usage would suggest even more that it's okay. The rated output of an amp is one thing, but what the power supply will actually draw, especially if not pushed hard, is another. Given what you've said there, I don't (as an amateur) see a problem. I was being somewhat pedantic .... but it is certainly the case that one 300w amp can be a very different proposition to another.
 
the only advice I can say is use a power bar and NOT the cube-type adaptors that allow 2 or 3 plugs into the wall at the same time. These things are dangerous.
 
Mine's pretty bad. I have four PCs, monitor, modem, laser printer, lamp (only 11w, but still), hi-fi, fan, and in the summer, aircon :eek:, all running off the two sockets in this room. Never had any problems (and I have line monitoring in place to tell me if anything bad happens).

And yes, avoid cube adaptors at all costs. Second worst thing behind having cables trailing across the floor.
 
It'll be fine.

I run a:

20" TFT
550W PSU
1500W dehumidifier
32" LCD TV
Printer
7 x 110W amp
400W sub
PS2
Gamecube
DVD Player
Camera recharger
Mobile recharger
Shaver recharger
Air freshener

All on one socket. Obviously nothing will be drawing max current and not everything is on at the same time but you should be fine unless you're running multiple hairdryers etc.
 
Berserker said:
And yes, avoid cube adaptors at all costs. Second worst thing behind having cables trailing across the floor.

I don't use them, but out of interest, what's wrong with them?
 
OllyM said:
I don't use them, but out of interest, what's wrong with them?
I've heard enough people say bad things about them, that I won't entertain plugging one in anywhere on my computer's power extension.

What is wrong with them, anyway? :confused:
 
They don't have fuses on, so you could draw upto 26A using two extension boards on a socket only made for 13A, for example.
 
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