I bought this amp to compare side by side with my violelectric v200. I could hear absolutely no difference, so I sold my violelectric and have been using this amp for a few months. It works wonderful and has a lot of power. Always used on low gain. It has great quality and is very sold. I attached a pic with my small objective o2 amp to show the size difference. I hate to part ways with it but I'm getting out of the headphone hobby and concentrating on theater audio instead. FREE shipping included. Any questions, just ask. Thanks.