Buying a Luxman L505z from Japan

+1 @oddiofyl !  too significant of a purchase...and why would you want a step up or down transformer when you can get 120v

@oddiofyl  +1

@fastfreight  +1

Buy from a dealer. Not worth the risk. 

If the seller is legit, do not worry about the voltage,

I have a JVC TT81 TT, 100v, and use a decent but inexpensive step-down transformer (as do many people, for many audio equipment items). I've used it since 2019.

Size larger than your unit’s power needs (consider a larger future load)

they have one for 500 watts, this one is 1600 watts

https://www.amazon.com/120V-100V-Converter-appliances-Certified%EF%BC%BD/dp/B07L57MTF6/ref=sxin_18_pa_sp_search_thematic_sspa?cv_ct_cx=step%2Bdown%2Btransformer&sbo=RZvfv%2F%2FHxDF%2BO5021pAnSA%3D%3D&sr=1-2-6e60e730-e094-43e9-99e8-1a4854cd27ff-spons&aref=Kh17eSDd7b&sp_csd=d2lkZ2V0TmFtZT1zcF9zZWFyY2hfdGhlbWF0aWM

Sure, it works with a transformer.  But if there is an issue with the unit do you want to deal with a seller Japan?  That is where a local (USA) dealer is worth their weight.  My Mola Mola Makua does not power up after a recent cable change.  I checked the fuse but no luck.  My dealer Bill Parish, GTT Audio, took care of the entire return and repair for me.  Smoooth.

Most of the naysayers have never tried to power a Japan amp with a step down.

I have done so successfully with Luxman and Accuphase. With the Accuphase's, I used a step down before having converted to US 120V spec. NO difference in sound. I second @elliottbnewcombjr 's rec. I have that very unit and have had great results. Enjoy!