I would like to use my Eden TN501 amp head in a fixed location at home (i.e. no gigging), but the unit I have is the European variant and only accepts 220-240v 50/60 Hz AC power. It does not appear to be switchable or flexible to accept 110-120v 60 Hz AC power, which is all I presently have. I am not ready to have an electrician dedicate an outlet to 220v gear and do not want to sell the Eden or see it sit unused. So I am trying to instead find a good step-up transformer I can use for the Eden and possibly some other lower-power 220v gear in time. A good step-up transformer is proving to be a challenge, though. Most of the step-up transformers I see as a US customer seem like junk, a roll of the dice at best, or suspiciously pricey. Kriëger's units (e.g. ULT1700 Voltage Transformers | Krieger Electric) seem to be pretty well regarded. Reviewers on Amazon appear to be happily using them with 220v studio monitors and a 220v guitar amp (Runs quiet and stays cool and Just what you want, Solid, Quiet and Works Perfectly respectively); but there are reviewers who complain they aren't very quiet or report other problems with them like with nearly all the brands I have shopped so far, and $150 to $220 is a lot of money to spend on a guess. ACUPWR units seem good but priced even higher for their power ratings, which I can't yet justify except with ACUPWR's claims that all its competitors (including Kriëger) exclusively make shoddy crap. Bronson++ units sold in Europe (e.g. https://bronson-energy.com/product/bronson-ti-2000/) appear to fit my needs perfectly in that they are specifically designed for studio use and seem reasonably priced; but apparently I cannot get one shipped to me in the US (per email feedback from Bronson Energy and notice from amazon.de). Can someone speak from experience to a brand of step-up transformers that I can buy with confidence for my needs? Also, considering how different brands recommend sizing a step-up transformer differently, I would appreciate any accompanying guidance on sizing. Please be gentle with this first-time poster, long-time reader. I have scoured other posts and the web generally for confidence-inspiring direction and simply have not found it, so I am hoping some of you can help. Thanks!