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Old 17th March 2012, 01:58 AM   #1
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Default SMPS300R or SMPS500R for UCD400

Hi,

I want to built two Hypex UCD400 monoblocks. Do I have to use 2 x SPMS500R or can I use 2 x Connexelectronic SMPS300R units. On the Hifimediy site it says it can deliver 400W peak power. It will save me $40.00.

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Old 17th March 2012, 05:33 AM   #2
luka is offline luka  Slovenia
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depends, if you will run amp at full power, or use it for more or less its peak power, for things like kick drums. if you would plan to drive sine, rap and similar type of music, 500 would be better

the way I see it, 40$ is not a lot, since you already have amps that were far more then 40$... I think I would somehow find those 40$ and for that have a lot more power, in case you would need it and to run things cooler
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Old 21st March 2012, 01:20 PM   #3
Cristi is offline Cristi  Europe
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Altought the SMPS300R can deliver ~400W peak power, you must consider that the UCD400 amplifier can deliver a higher peak power than the rated power, ~500W if supplied accordingly. Then with an estimate worse case efficiency value of 90% that means a 550W power required. The dynamic will suffer if used a high volume and the sound quality might not be up to expectations. Thus the power supply power rating should be at least equal with the amplifier power rating.
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