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5 Nov 2024 05:23:10 EST (-0500)
  A simple question (Message 54 to 63 of 153)  
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From: scott
Subject: Re: A simple question
Date: 2 Apr 2008 02:47:27
Message: <47f33a0f$1@news.povray.org>
> 1.0 W (RMS) per speaker.

ARGHHHHHHH one of my pet hates, it's MEAN POWER not RMS.  Actually what is 
usually meant is "continuous sine wave average power", so you pump out the 
loudest sine wave you can, and measure the *MEAN* power (which is RMS 
voltage * RMS current).  That's the figure you put on the speaker.


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From: Stephen
Subject: Re: A simple question
Date: 2 Apr 2008 02:56:46
Message: <pve6v3p9f92g56llgp5ag8o8lc70obo3g2@4ax.com>
On Wed, 2 Apr 2008 09:47:50 +0200, "scott" <sco### [at] laptopcom> wrote:

>> 1.0 W (RMS) per speaker.
>
>ARGHHHHHHH one of my pet hates, it's MEAN POWER not RMS.  Actually what is 
>usually meant is "continuous sine wave average power", so you pump out the 
>loudest sine wave you can, and measure the *MEAN* power (which is RMS 
>voltage * RMS current).  That's the figure you put on the speaker.
> 

You try talking about Volt amps in a shop and I wish you well :)
-- 

Regards
     Stephen


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From: Invisible
Subject: Re: A simple question
Date: 2 Apr 2008 03:04:33
Message: <47f33e11$1@news.povray.org>
>> The speaker housings appear to be metal, which is unusual. (Mind you, 
>> they claim to be magnetically shielded...)
> 
> So if you put a floppy disk in front of the speaker, it won't get 
> affected? Cool :)

More so you can put it next to your CRT monitor and not magnetise it...

-- 
http://blog.orphi.me.uk/
http://www.zazzle.com/MathematicalOrchid*


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From: scott
Subject: Re: A simple question
Date: 2 Apr 2008 03:05:30
Message: <47f33e4a$1@news.povray.org>
> You try talking about Volt amps in a shop and I wish you well :)

Hehe no way :-)  It took me until I was at my power electronics course in 
1st year University before I finally found out why things had power written 
on them in VA rather than W.  I don't expect the person selling me speakers 
in a shop to have done an Engineering degree.


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From: Invisible
Subject: Re: A simple question
Date: 2 Apr 2008 03:05:44
Message: <47f33e58@news.povray.org>
Stephen wrote:

> You try talking about Volt amps in a shop and I wish you well :)

Trying to explain to me how Volt Amps is different from Watts would 
probably be a bigger challenge. :-P

-- 
http://blog.orphi.me.uk/
http://www.zazzle.com/MathematicalOrchid*


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From: Phil Cook
Subject: Re: A simple question
Date: 2 Apr 2008 03:09:11
Message: <op.t8y4ym02c3xi7v@news.povray.org>
And lo on Tue, 01 Apr 2008 21:51:01 +0100, Gail Shaw sa dot com>  
<"<initialsurname"@sentech> did spake, saying:

>
> "Orchid XP v8" <voi### [at] devnull> wrote in message
> news:47f29204$1@news.povray.org...
>> Phil Cook wrote:
>>
>> > Compared to some of the tabloids the Daily Mash is the only one to >  
>> make any sense
>> >
>> > http://tinyurl.com/2t2bpa is topical for here :-P
>>
>> ...what the...? o_O
>
> Hehehe. Forwarded on to my atheist friend. I know she'll enjoy it.

Some of the stories can be a bit crude, but you get the odd gem.

-- 
Phil Cook

--
I once tried to be apathetic, but I just couldn't be bothered
http://flipc.blogspot.com


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From: scott
Subject: Re: A simple question
Date: 2 Apr 2008 03:09:53
Message: <47f33f51@news.povray.org>
>> So if you put a floppy disk in front of the speaker, it won't get 
>> affected? Cool :)
> 
> More so you can put it next to your CRT monitor and not magnetise it...

What's a CRT monitor? Seriously, haven't seen one of them for years now.


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From: scott
Subject: Re: A simple question
Date: 2 Apr 2008 03:13:58
Message: <47f34046$1@news.povray.org>
>> You try talking about Volt amps in a shop and I wish you well :)
> 
> Trying to explain to me how Volt Amps is different from Watts would 
> probably be a bigger challenge. :-P

Read this then ask questions ;-)

http://en.wikipedia.org/wiki/AC_power


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From: Stephen
Subject: Re: A simple question
Date: 2 Apr 2008 03:15:15
Message: <buf6v31n8e3ucl1sprmf3a91v4l6nunkks@4ax.com>
On Wed, 02 Apr 2008 09:05:21 +0100, Invisible <voi### [at] devnull> wrote:

>Stephen wrote:
>
>> You try talking about Volt amps in a shop and I wish you well :)
>
>Trying to explain to me how Volt Amps is different from Watts would 
>probably be a bigger challenge. :-P

Volt amps takes into account the phase difference between the volts
and the current. As you know then you pass an ac current through a
capacitor or an inductor there is a phase difference. Volt amps is V *
cos(phase) *A.
Simple, What?
-- 

Regards
     Stephen


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From: Stephen
Subject: Re: A simple question
Date: 2 Apr 2008 03:16:04
Message: <55g6v3plim4hkejh4a8j3o3s2gv5fjv6n7@4ax.com>
On Wed, 2 Apr 2008 10:05:53 +0200, "scott" <sco### [at] laptopcom> wrote:

>> You try talking about Volt amps in a shop and I wish you well :)
>
>Hehe no way :-)  It took me until I was at my power electronics course in 
>1st year University before I finally found out why things had power written 
>on them in VA rather than W.  I don't expect the person selling me speakers 
>in a shop to have done an Engineering degree.
> 
To true and why should they :)
-- 

Regards
     Stephen


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