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NEWB Question - What does wattage/power do?

post #1 of 5
Thread Starter 
Okay, this is an extremely NEWB question. On different receivers or pre-amps they have the amount of wattage that's put into each channel.
Like my receiver does something like 150w per channel.
Now I figure more is obviously better.
My first basic assumption is..
more wattage = capable of going louder?

Can someone explain what advantages having more wattage gives?

The reason i ask is because I plan to upgrade from my 5.1 Sony receiver
to something with more features and hopefully better processing.
I was noticing that a lot of the less expensive 7.1 receivers that go for around 400-500 dollars, which is what I was hoping to spend, average at around 80-90 watts per channel as opposed to 150w or wahtever it was my Sony did.
I need to understand what I'm compromising in a new receiver with less wattage.
Note that I don't have a big house or anything. I live in a two bedroom apartment with a family room that is about 12'x12'. That's NOT uncluding the dining area which isn't seperated from the family room in any real way. IT's essentially part of the same room, which baiscally doubles the size.

One a SIDE NOTE: I understand that I could use the Pre-amp outputs on most receivers to hook up the speakers to amps with more power. IF so what would
be some good options to look into for the future for a 7.1 set-up? The Sub of course already has it's own pre-amp.
post #2 of 5
Well, wattage is only part of the picture. The quality of the amplifier construction (power transformer, capacitors, etc.) also plays a big role on how powerful an amplifier actually is.

For example, Sony rates most of their receivers with only one or two channels driven, at a 1kHz frequency (one of the easiest frequencies for any amp to drive). An honest company will usually rate the amplifier at the full 20-20,000kHz frequency range at 8 ohms, with ALL channels driven. Obviously, the more channels active on an amplifier, the more stress on the amplifier's power transformer and other internal components.

This is why an NAD, H/K or Rotel can be rated at perhaps 70W per channel, yet weigh twice as much as the Sony that claims 110W per channel. The better-designed amp, though rated lower, will always win in terms of dynamics, volume, etc. If you were to test a non-ES Sony model the proper way, it wouldn't be surprising to find that the amp might produce an honest 40W per channel with all channels driven at full frequency range, at 8 ohms.

So in essence, you're really not compromising anything by going to 90W per channel, because just about any Denon, Marantz, H/K, etc. in the $400-500 price range will have a better designed amplifier section than a typical Sony.

To answer your second question, virtually any receiver these days can output at least 6-channel analog to an external amplifier.
post #3 of 5
Thread Starter 
hey Chunk,
Thanks a ton for putting my worries to rest. I was really highly considering an H/K receiver I saw at bestbuy so now I can get it without worries!I will definaly be picking one up now. That or a Denon, I haven't decided yet and besides it will probobly be a few weeks.
post #4 of 5
And a short answer would be that there is no way most modern receivers would be too underpowered to fill the area you have with sound. Wattage might vary on the spec sheets, but they will all be loud enough for you. If you start using anywhere near the 75+ watts any of these receivers will put out your neighbors will be pounding on the walls and management will come looking for you.
post #5 of 5
Thread Starter 
Quote:
Originally Posted by Warhawk71 View Post

And a short answer would be that there is no way most modern receivers would be too underpowered to fill the area you have with sound. Wattage might vary on the spec sheets, but they will all be loud enough for you. If you start using anywhere near the 75+ watts any of these receivers will put out your neighbors will be pounding on the walls and management will come looking for you.

Good to know!!
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