The SMPS300R is 110V - any problem using with 117V and 120V? - diyAudio
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Old 26th November 2011, 10:04 PM   #1
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Default The SMPS300R is 110V - any problem using with 117V and 120V?

After reading comments here am considering buying Hifimediy T4 or T2 amp.

But, the power in my house is the more standard 117 )or 120VAC=, not the uncommon 110V. This power supply is designed for 110 vac. 110 vac is really not common, why would they design a power supply for this voltage?

What are the implications? Overheating? Shorter life?

Also, what other parts are needed to put this together? A dual audio potentiometer? What value and where to buy it?
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Old 27th November 2011, 12:32 PM   #2
gmarsh is offline gmarsh  Canada
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It'll be fine. Almost every "110V" SMPS on the planet can handle 100-130V.
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Old 27th November 2011, 01:19 PM   #3
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ALL SMPS designs are PWM controlled. A few extra volts wont normally worry them.

If a designer has produced a design that cannot cope with a few extra volts then he/she should be crucified.

Most PSUs can operate between 110 and 240V but that takes careful design.
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Old 27th November 2011, 01:40 PM   #4
AndrewT is offline AndrewT  Scotland
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As Gmarsh says, most SMPS are designed for universal use around the world.
The SMPS will specify the range of voltage for which it is suitable.
If it does not state that usable voltage, then don't plug it in. Send it back and demand all your money back.
regards Andrew T.
Sent from my desktop computer using a keyboard
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