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From: bob urz on 21 Mar 2010 13:15
http://www.meyersound.com/sound_solutions/?m_id=27

bob
From: Rupert on 21 Mar 2010 17:41
On Mar 21, 10:15 am, bob urz <so...(a)inetnebr.com> wrote:
> http://www.meyersound.com/sound_solutions/?m_id=27
>
> bob

That might good thing to point newbies to though the example sited is
Meyer specific. IOW, it doesn't allude to a duty cycle or percentage
of average vs. peak current. But it it's a good tipoff. Powered
speakers like the ones by Mackie often only list maximum current
rather than what the box will actually draw with real music. They'll
say use a 15A or 20A service (@120v) for a box that will likely draw
less than 5A even when they're being hammered. At least nowadays the
good amp manufacturers will post 1/8 and 1/3 current draws at a given
speaker load so people can plan for a more real world scenario. 1/3
of max draw at a given load has been worse case in my experience with
1/8th being more on par with dynamic sources and occasional clip/peak
limiting.

Rupert
From: George's Pro Sound Co. on 21 Mar 2010 18:58

"Rupert" <foodsteaks(a)gmail.com> wrote in message
news:a682412b-8ab2-4708-bba6-a67f6e7d072f(a)p3g2000pra.googlegroups.com...
On Mar 21, 10:15 am, bob urz <so...(a)inetnebr.com> wrote:
> http://www.meyersound.com/sound_solutions/?m_id=27
>
> bob

That might good thing to point newbies to though the example sited is
Meyer specific. IOW, it doesn't allude to a duty cycle or percentage
of average vs. peak current. But it it's a good tipoff. Powered
speakers like the ones by Mackie often only list maximum current
rather than what the box will actually draw with real music. They'll
say use a 15A or 20A service (@120v) for a box that will likely draw
less than 5A even when they're being hammered. At least nowadays the
good amp manufacturers will post 1/8 and 1/3 current draws at a given
speaker load so people can plan for a more real world scenario. 1/3
of max draw at a given load has been worse case in my experience with
1/8th being more on par with dynamic sources and occasional clip/peak
limiting.

Rupert

I use the 1/3rd method to determine ac service requirments
George


From: Joe Kotroczo on 22 Mar 2010 12:55
On 21/03/2010 17:15, in article ho5k5n$dio$1(a)speranza.aioe.org, "bob urz"
<sound(a)inetnebr.com> wrote:

> http://www.meyersound.com/sound_solutions/?m_id=27

The other link you posted was a least mildly funny, in a somewhat worrying
"yes, the americans are insane" way. This is just boring stuff we all know.
Electricity 101.

Actually, hang on, is there a version of it with catering equipment? That
might actually be useful.


--
Joe Kotroczo kotroczo(a)mac.com

From: Rupert on 22 Mar 2010 15:07
On Mar 21, 3:58 pm, "George's Pro Sound Co." <bm...(a)yahoo.com> wrote:
> "Rupert" <foodste...(a)gmail.com> wrote in message
>
> news:a682412b-8ab2-4708-bba6-a67f6e7d072f(a)p3g2000pra.googlegroups.com...
> On Mar 21, 10:15 am, bob urz <so...(a)inetnebr.com> wrote:
>
> >http://www.meyersound.com/sound_solutions/?m_id=27
>
> > bob
>
>> That might good thing to point newbies to though the example sited is
>> Meyer specific. IOW, it doesn't allude to a duty cycle or percentage
>> of average vs. peak current. But it it's a good tipoff. Powered
>> speakers like the ones by Mackie often only list maximum current
>> rather than what the box will actually draw with real music. They'll
>> say use a 15A or 20A service (@120v) for a box that will likely draw
>> less than 5A even when they're being hammered. At least nowadays the
>> good amp manufacturers will post 1/8 and 1/3 current draws at a given
>> speaker load so people can plan for a more real world scenario.  1/3
>> of max draw at a given load has been worse case in my experience with
>> 1/8th being more on par with dynamic sources and occasional clip/peak
>> limiting.
>>
>>Rupert
>
> I use the 1/3rd method to determine ac service requirments
> George

Yup, same here. If you were to distro for the maximum possible draw,
the distro would be a 100 3ø where a 50A single phase service would be
fine. Overkill to say the least.

Rupert
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