Purchased on Mercari. Used several times at live performances. Operation confirmed. The following is a quote from the seller's sales page: ⭐︎ I have sold over 150 line transformers, and I am grateful to have received all high ratings. Regarding line transformers, I mainly sell them as clones, but I am proud to say that I produce products with superior quality in terms of wiring technology and noise processing methods compared to the original products. Manual sales of manufacturing methods are also increasing, but since accurate cloning and noise processing methods are not being performed, please use our products if you are looking for quality that you can use with confidence on site. This is a transformer box based on Cafe au Lable's Amateras. Although it has a narrow width, the performance is the same as the original size. It is a clone of Cafe au Lable's Amateras0058 (0001). The reason for the parentheses around 0001 is that no performance difference was found between the two products. Therefore, 0058 and 0001 XLR have the same performance. However, please rest assured that the transformer effect is definitely obtained when using dynamic microphones such as SM58. (Do not use phantom power to drive condenser microphones. This may cause a malfunction) Please refrain from purchasing handmade products if you are concerned about slight scratches or scuffs. It is a smaller size than Amateras0058. (※ Please note that the input impedance is recommended to be 1kΩ or less) ・Case: HAMMOND 1550A (89 x 35 x 30.1) ・OEP transformer ・Wiring material: Oyaide single-core silver 0.5mm ・Solder: SS-47 ・Jacks: Neutrik The above parts are used, but there may be slight changes in the layout, etc., which do not affect the sound performance. Please understand. If you are concerned about the sound quality, please watch the comparison video with the original. https://youtu.be/I2w54vKCMUI There is also a comparison video with Lundahl. Please watch it. YouTube "OEP & Lundahl Transformer 2 Types Comparison" https://youtu.be/pNRHIy1CULg