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Teac AI-303 Amplifier Japanese Model - Is it Really 100VAC Only?

HarryY

HarryY

New Member
I have a Teac AI-303 Amplifier that is the Japanese Model from Japan (Silver)

As I understand it this amplifier uses the HYPEX NC52MP Amplifier/Power Supply module in it.

When I read the Data Sheet https://www.hypex.nl/media/7d/cf/36/1708611599/Datasheet_A4-R03 NC52MP-01xx.pdf
It says that the Line input voltage is 100-240VAC at 47-63 Hz - Universal mains (100-240V) being one of the features of it


If I go to the Japanese website for TEAC https://teac.jp/jp/product/ai-303/spec
and look at the specs for the AI-303 it shows AC 100V, 50/60Hz

It seems odd that TEAC would have made a version of this specifically for Japan
that is limited to AC 100V, 50/60Hz espesially seeing that they are using the
HYPEX NC52MP Amplifier/Power Supply that is made for 100-240VAC at 47-63 Hz

Has anyone looked into this and knows for certain?

This site - https://www.av-online.hu/hifi/teac-ai-303-sztereo-erosito-teszt_4014
shows some internal pictures and it sure looks like the HYPEX NC52MP is in it.

Thank you
 
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I have to agree with your logic..it seems unlikely that there would be a Japan-only version of that power supply especially when it is unnecessary since the NC52MP covers the range.

So..have you plugged it in??
 
I have it plugged in via a step-down transformer but as
petehall347 suggested I may need to open it up and look a the
caps to see what voltage they are rated for in the PS Section.
 
HarryY said:
I have it plugged in via a step-down transformer but as
petehall347 suggested I may need to open it up and look a the
caps to see what voltage they are rated for in the PS Section.
Click to expand...

My guess is that any real difference would be in the transformer and not the caps.
 
I would look for any unused primary taps, or tied off wires on the primary side of the transformer. Maybe there's a voltage selector inside? :dunno:
Posting some good pictured of the power supply and transformer may help others to figure it out.
 
Last edited:
Lavane said:
Inwould look for any unused primary taps, or tied off wires on the primary side of the transformer. Maybe there's a voltage selector inside? :dunno:
Posting some good pictured of the power supply and transformer may help others to figure it out.
Click to expand...
its smps supply
 
Lavane said:
I have a few pieces of equipment with switchers that can operate at a range of voltages. Some will, some won't though. I have an all tube headphone Amp that can work with any voltage from 90v to 230v without having to flip a switch, swap a wire,etc.
Click to expand...
yes lots of them can do . i have seen instances of lower voltage main caps for lower mains voltage only . i dont think they would put a higher voltage cap for low voltage only . it would cost more .
 
I had some time to open it up and it's Labeled 100-240V at 50-40 Hz
and it does use the HYPEX NC52MP Amplifier/Power Supply module.

Hopefully, this info helps others.
 

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Last edited:
HarryY said:
I had some time to open it up and it's Labeled 100-240V at 50-40 Hz
and it does use the HYPEX NC52MP Amplifier/Power Supply module.

Hopefully, this info helps others.
Click to expand...
Well then, it appears that your safely covered with a auto adjusting full range AC input voltage availability !
Should be no worries concerning this, HarryY.
 
Hi Harry

I am now considering to buy the Japanese model of AI-303 and use it in the US. Were you able to verify that the unit is indeed usable without converter in practice? Thank you in advance.
 
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