500W Japan Voltage Converter Transformer – Step Up/Down 100V to 120V / 120V to 100V – Heavy Duty Power Converter with Fuse Protection & Fully Grounded Cord (JP-500)

Bought a Japan market used Denon stereo amplifier from 80s for very cheap, and this step down transformer works perfectly well for me. May buy more if I find more good deals from Japan market.

Muy bueno

Very solid piece of equipment, almost noise free! Recommend

Just Note: It is depend upon the Device, step downed side, wattage.. But, it is still in unknown condition until you really use the Device and see How things go.

I travel between Japan and the US quite often. Often times having appliances or electronics that I need to use in both locations. The step up step down transformers exactly what I need. When in the US I can bring it to the 120 volt and still use the one hundred volt products without any issues. When I'm in Japan I can do the exact opposite and take the 100 volt and pump it up to the 120 volt so that I could use the US products without any issues.This transformer has a 1000 w capacity which is good for most household items. I do wish it had one that was up to 2000 Watts so I could use most of the things that I would plug in like hair irons or dryers.With a side overall this has worked perfectly and I'm very happy with it

If you are an electronics geek ... ahem .. fan, like I am, you have undoubtedly discovered that there is a lot of cool audio gear that was made specifically for the Japanese Domestic Market (JDM) and not intended for export. Telltale signs are: 100V AC requirement, for vintage radios FM is limited to 76-90 MHz, some of the gear even has cool Japanese writing on it, although most of them have the front panel functions in English. So, here comes the limitation: 100V equipment, even ones that are fine with 60Hz frequency, cannot be used directly in the USA where most locations use approx. 125V / 60 HZ AC power. The difference in US domestic voltage with the needs of 100V equipment is simply too large; risks such as safety, longevity and proper function must all be considered.In comes this step down transformer that allows the 125V to be safely converted to 100V for proper use of the JDM equipment in the USA. This particular unit can also be switched to become a step up transformer in case one wants to use US designated equipment in Japan. My need is strictly for the step down function. The first thing you will notice about this transformer is its build quality; it is a thing of beauty: looks good and is solidly built. It is easy to use and has a generous power limit for audio equipment (I have the 500W model). The unit runs quietly (no annoying hum or anything like that), it runs cool, and most importantly, it allows the JDM equipment to function safely and properly. I used this transformer to power a large Sony boombox (model CFS-V8) and it worked fine; I did not notice any weird artifacts from the transformer. I'm on the hunt for a cool vintage JDM audio amplifier; the generous 500W capability of this unit will be more than sufficient to power the amp and have room to spare.So, if you have need for a step up or down transformer to go between 125V and 100V AC, this transformer will work safely and reliably. While there may be smaller sized units out there, for safety and piece of mind, I would recommend a more robust unit like this one that has the build quality for peace of mind. This unit is all black metal construction and can easily blend into the background to be unnoticed. Select the power capacity based on your anticipated needs. I have the 500W unit that provides plenty of power for home audio equipment. Simply works and recommended. A++++++++Update: I have recently acquired a Sony TA-F333ESX integrated amplifier from Japan and this step down transformer performs flawlessly, allowing me to safely use this cool vintage JDM amp in the USA. Way cool. This transformer continues to be highly recommended. A++++++++

Among the things you shouldn't skimp on: anything that can potentially cause a fire, or ruin a priceless piece of electronics. We are avid collectors of retro gaming paraphernalia, as well as older Japanese electronics such as clocks and, well, clocks. For those items, this is a bit overkill. You could plug in every Japanese item we own that possesses a plug, and they wouldn't clock in at 3000w.However, we recently acquired a 90s Astro City arcade machine, and that definitely takes more than a digital clock or a Dreamcast. We felt that needed something a little more beefy for this particular "gadget". So far, so good. We don't leave it plugged in constantly, but it has worked perfectly every time we've used it.Compared with the other, sleeker step u/d converters we've had, this one looks "older" by comparison, but it also doesn't heat up, like at all, like some of the smaller form factor ones we've owned. It emits no noise at all. It is quite hefty.

This is a straightforward buck/boost transformer for conversion between 100V and 120V. The construction is sturdy and the included circuit breaker prevents overloads. The 2kW rating is not something I would want to test continuously with this transformer. It is toroidal, which is good for efficiency and low magnetic hum emission, but uses 12 gauge aluminum wire, which is _just_ barely suitable for the rated power at 120V; there is almost no safety margin. It runs HOT at 2kW, but that doesn't mean it will fail..