The SMPS300R is 110V - any problem using with 117V and 120V?

skyler · 26th November 2011, 10:04 PM

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?

gmarsh · 27th November 2011, 12:32 PM

It'll be fine. Almost every "110V" SMPS on the planet can handle 100-130V.

KatieandDad · 27th November 2011, 01:19 PM

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.

AndrewT · 27th November 2011, 01:40 PM

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.

26th November 2011, 10:04 PM	#1
skyler diyAudio Member Join Date: Nov 2011	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?

27th November 2011, 01:40 PM	#4
AndrewT diyAudio Member Join Date: Jul 2004 Location: Scottish Borders	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.

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27th November 2011, 12:32 PM	#2
gmarsh diyAudio Member Join Date: Apr 2004 Location: Halifax, NS, Canada	It'll be fine. Almost every "110V" SMPS on the planet can handle 100-130V.

27th November 2011, 01:19 PM	#3
KatieandDad diyAudio Member Join Date: Nov 2011 Location: UK	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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