I use Sanyo Step Down Transformers (5 years) since I started using 100V equipment. Some of the Sansui equipment offers 100, 110, or 117 volt options on the transformers. I decided to wire them for 100V and use a step down Transformer for exact voltage. At first I used a big 2K off brand TF (Ugly & very loud) Then I heard about Sanyo's line. I use the TSD-N15LU with protection and capacity indicator. I run 2 diff systems. #1 powers an AU-111G & A717D CD Player (uses 2 amps per Killa Watt Meter) 2nd unit powers a pair of HF-V60 Mono Blocks, CA-303 Pre Amp & A717-DR CD Player. The Sanyo's look great (WAF) Especially If you have a nice front room system. They are also very quiet. My systems sound great. Not sure I have ever heard any bad press about using a SDT.