I'm trying to squeeze out 160W x 2 nominal , this is underrated even so .
( i can't find it's manual )
I've seen a oversized toroid for 40$ at my nearby electronics store .
( not sure what it's rating , i can't possibly tear open the plastic wrapping it up . )
Oddly the MRV-400 has a big toroid inside . ( And also , i only need +-5% 14.4v power , as the MRV - 400's SMPS is quite beefy . )
this is what you need. 400VA 60 Hz toroid > note it is about 4 kilos, now that's beefy.
You should measure your AC mains at several points during the day to get the min and max line voltage at high demand and low demand periods. This way you will have a better idea of how the actual test conditions will affect your situation.
You should measure your AC mains at several points during the day to get the min and max line voltage at high demand and low demand periods. This way you will have a better idea of how the actual test conditions will affect your situation.
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if you are thinking of using your amp in the house using ac line power, i believe you will be better off bypassing the smps supply and go for a linear dual rail psu, look at the inside of the amp, if you filter caps are say 63volts dc, then most likely you have +-55volt rails....
you can then buils a psu based on this....this is what i'd do if that amp was mine.....😀😀
Hi
Yes bypassing the SMPS make sense from an engineer's POV. but this takes extra knowledge and esp. commitment, Not everyone fits this category! commitment of the OP and/ or his mentors time, and resources building a DC supply that is very limited to it's specific use.
Building an extra big AC to DC 14 V supply could prove to be a valuable piece of gear for folks that dabble with 12V electronics or need to charge auto batteries quickly from time to time.
Yes bypassing the SMPS make sense from an engineer's POV. but this takes extra knowledge and esp. commitment, Not everyone fits this category! commitment of the OP and/ or his mentors time, and resources building a DC supply that is very limited to it's specific use.
Building an extra big AC to DC 14 V supply could prove to be a valuable piece of gear for folks that dabble with 12V electronics or need to charge auto batteries quickly from time to time.
you need to start modifying the unit making it unlikely to return to it's stock resale value once the deams fade.
what about supporting built in protection functions like shut down etc. you need to get the schematic and find out what's going on before just ripping out parts and adding wires, right?
Precisely , what i need is just 14.4v .
I don't want to bypass it, it's more then complicated and no one has the schematics for it .
And it makes no sense to use pure regulated.
Just a 400va 50hz 240v tranny , 1 diode bridge recto, CC network will be fine .
4kg ? I was expecting 10kg .
That's a solid looking tranny.
12v bef rectifying , 16.8 vdc but this is well within its voltage range, allow 2v drop for load
and fluctuations.
good , my amp is a beefy 6kg already.
Amp heads are always way heavier then just 20kg .
How about caps recommendations?
should i parallel 2 x 20Kuf ?
look at post #6....but as you say, if you don't know what youre' doing, then don't....😀
I never said that, If the OP wants to turn his gear to an experiment with you and post #6 leading that expedition, that's his choice to make. see my post#24
old atx psu's are dirt cheap, 2 or more in parallel(using the 12 volt rail) will give him a quick start....
... so how much does a 400VA tranny cost?
do the smps have 14.4 output?
And don't ask me to feed it directly , that's why the amp has it , it's to BUMP UP VOLTAGE AND REGULATE IT.
and yea, it runs on 60v rails.
14.4 volts is just one of the conventions.....a fully charged batter well have an unloaded terminal voltage of 13.8 but load the battery and it drops to 12volts....
you need a source of 12 volts dc with high current, something easily obtained with 2 or more atx psu's in parallel....
you need a source of 12 volts dc with high current, something easily obtained with 2 or more atx psu's in parallel....
Are you sure?
If the car amp has an SMPS inside it to convert ~14Vdc to a dual polarity regulated +-60Vdc, then you should find that the +-60Vdc holds fairly steady for a range of input voltages around the 11Vdc to 16Vdc mark.
If it can't hold a steady PSU voltage then there is something wrong with the SMPS and Regulator by design or by abuse.
If the car amp has an SMPS inside it to convert ~14Vdc to a dual polarity regulated +-60Vdc, then you should find that the +-60Vdc holds fairly steady for a range of input voltages around the 11Vdc to 16Vdc mark.
If it can't hold a steady PSU voltage then there is something wrong with the SMPS and Regulator by design or by abuse.
it is the speakers that you connect to your amp and how loud you play that amp that determines how much power is drawn...
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