Frequency Response? Help newbie...

Hi,

I was shopping around for a receiver and I'm having a difficult time
understanding the specs listed.
what does this mean:


Frequency Response at 1W (+0dB,–3dB) 10Hz – 100kHz

I think it means that the receiver can output frequencies between 10Hz
and 100kHz to the speakers, but what does the "at 1W (+0dB, -3dB)"
mean? Is it the speaker gain?
Also, I thought that humans could only hear between 20Hz - 20kHz...
why is it necessary to have such a high bandwidth? I've never even
seen speakers that go higher than 20kHz.

Basically at 1 watt of output power, the response, within 0 to -3db of
volume, is 10hz to 100khz. The reason for the 'out of range' response is
that frequencies 'roll off' not CUT off, therefore the response is good well
beyond what we can hear.

Clay


--


There are 10 kinds of people in the world:
Those who understand binary, and those who don't.

"Shaman" wrote in message
om...
Hi,

I was shopping around for a receiver and I'm having a difficult time
understanding the specs listed.
what does this mean:


Frequency Response at 1W (+0dB,-3dB) 10Hz - 100kHz

I think it means that the receiver can output frequencies between 10Hz
and 100kHz to the speakers, but what does the "at 1W (+0dB, -3dB)"
mean? Is it the speaker gain?
Also, I thought that humans could only hear between 20Hz - 20kHz...
why is it necessary to have such a high bandwidth? I've never even
seen speakers that go higher than 20kHz.

thanks for replying... but I still don't get it...
I mean, why is that spec necessary? Nobody listens to music/movies at
1 watt of output power... what if I listen at a much higher volume
level?


"Badger" wrote in message . com...
Basically at 1 watt of output power, the response, within 0 to -3db of
volume, is 10hz to 100khz. The reason for the 'out of range' response is
that frequencies 'roll off' not CUT off, therefore the response is good well
beyond what we can hear.

Clay

What you want from a receiver/amplifier is a 'flat' response in all audible
ranges. Flat meaning that when measured and graphed there are no frequencies
which have dips or peaks. In reality this is impossible, which is why there
are tolerances.
A receiver capable of much better than hearing range 'should' be very
capable in the hearing ranges. Receivers that can maintain this for greater
ranges, in theory perform even better in the 'center' or hearing ranges.
Years ago when these numbers were more meaningful, receiver were not nearly
as able to do it.

My advice is to listen to as many as you can, and buy the one in your
budget, from a name brand company, in which to YOU sounds the best.

Clay

--


There are 10 kinds of people in the world:
Those who understand binary, and those who don't.

"Shaman" wrote in message
m...
thanks for replying... but I still don't get it...
I mean, why is that spec necessary? Nobody listens to music/movies at
1 watt of output power... what if I listen at a much higher volume
level?


"Badger" wrote in message
. com...
Basically at 1 watt of output power, the response, within 0 to -3db of
volume, is 10hz to 100khz. The reason for the 'out of range' response is
that frequencies 'roll off' not CUT off, therefore the response is good
well
beyond what we can hear.

Clay

you've discovered the secret!!! that spec is virtually meaningless!! just
like most specs are!!

and no, im not kidding. your own ear is the only 'spec' you need. that and
the number and type of inputs on the back g

randy

"Shaman" wrote in message
m...
thanks for replying... but I still don't get it...
I mean, why is that spec necessary? Nobody listens to music/movies at
1 watt of output power... what if I listen at a much higher volume
level?


"Badger" wrote in message
. com...
Basically at 1 watt of output power, the response, within 0 to -3db of
volume, is 10hz to 100khz. The reason for the 'out of range' response is
that frequencies 'roll off' not CUT off, therefore the response is good
well
beyond what we can hear.

Clay

you've discovered the secret!!! that spec is virtually meaningless!!
just
like most specs are!!

and no, im not kidding. your own ear is the only 'spec' you need. that
and
the number and type of inputs on the back g

Somebody give that boy a cupie doll. He just hit the bull's-eye!

When planning a system for somebody else it's probably a good idea to use
test gear and document your results in case someone calls into question your
judgment and skill. When designing a system for your own pleasure nothing
matters more than what you enjoy. Go out and listen to a bunch of stuff and
pick what you like. Some reputable audio dealers like Sound Advice will
allow you to audition gear in your home for a few days and exchange it if
you're unhappy.

Regards,
Robert

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