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Old 18th January 2013, 06:10 PM   #2391
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please, help!! is it ok transformer 628VA 73Vmax for both stereo chanel ?!
I mean if its not enough power, what can be happen?

The deal is that I Have this psu and 700wt petrol electricity generator as a power suply for all that
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Old 18th January 2013, 06:13 PM   #2392
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Originally Posted by tranceanddance View Post
Hello! please inform me how much power must have PSU for 2 chanels apex b500?
is it ok ~628 VA 2x73V under 4.3A for 2 chanels?

thank you
~628 VA 2x73V under 8.6A its for one channels.
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Old 18th January 2013, 09:46 PM   #2393
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thank you very much ! and what about stereo minimum requirements for PSU (500wt*2) ?
VA,Vmax,A...
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Old 19th January 2013, 05:01 PM   #2394
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Quote:
Originally Posted by tranceanddance View Post
thank you very much ! and what about stereo minimum requirements for PSU (500wt*2) ?
VA,Vmax,A...
go to 500W PA amplifier with Limiter
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Old 19th January 2013, 05:14 PM   #2395
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Originally Posted by ahmadfay View Post
hi Apex,
can you inform me about the power output standard B500, if the model developed brigde (BTL).
and is capable of if given a 2 Ohm load?, what is the power output? Thank you.
greetings
with bridge mode 8r load is min impedance for safety with B500.
or go to 3ef and you can bridge mode with 4r load.
regards...
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Old 19th January 2013, 08:59 PM   #2396
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thanks! how about amperes, how much amperes should give PSU, how to calculate it in right way ?
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Old 19th January 2013, 09:35 PM   #2397
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Originally Posted by tranceanddance View Post
thanks! how about amperes, how much amperes should give PSU, how to calculate it in right way ?
what is association between VA(P) of psu,Vac and A ?
for example, how much Vac I need from 1000Wt psu..or 700wt..or 640wt psu... for stereo mode ?! how to calculate it ?!

hope to get an answer, thank you in advance !!!

Last edited by tranceanddance; 19th January 2013 at 09:45 PM.
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Old 20th January 2013, 06:37 AM   #2398
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Quote:
Originally Posted by tranceanddance View Post
what is association between VA(P) of psu,Vac and A ?
for example, how much Vac I need from 1000Wt psu..or 700wt..or 640wt psu... for stereo mode ?! how to calculate it ?!

hope to get an answer, thank you in advance !!!
en_ohm.jpg
hope this will help you.
regards.
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Old 20th January 2013, 06:57 AM   #2399
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thanks, i know that formules, but still have little misunderstanding..i mean...for example
if I have 1000VA transformer, how can I calculate how much U and I i must have for this amp?
I know only one thing - P(W)-1000wt(stereo mode), how I can calculate U(volts) and I(amperes) ?!

P=UI, so i need to know more or U or I to get almost all I need to build PSU


what is algorythm?

Last edited by tranceanddance; 20th January 2013 at 07:09 AM.
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Old 20th January 2013, 09:54 AM   #2400
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Quote:
Originally Posted by tranceanddance View Post
thanks, i know that formules, but still have little misunderstanding..i mean...for example
if I have 1000VA transformer, how can I calculate how much U and I i must have for this amp?
I know only one thing - P(W)-1000wt(stereo mode), how I can calculate U(volts) and I(amperes) ?!

P=UI, so i need to know more or U or I to get almost all I need to build PSU


what is algorythm?
for 500watt load 4r.
(PxR)sqrt=vrms
(500x4)sqrt=44,72

P/vrms=I
500/45=11,11

so for real 1kw stereo is 45vrms at 22,22A
or PSU spec is 55vac 25A.
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