Hi Steve, There is not a huge amount to say about the mods themselves that is not already on the website. They replace the complete output stage from the DAC onwards, cutting out all of the circuitry you see below from the signal path. [img]http://www.audiosmile.com/images/deq-output.jpg[/img] The idea of using transformers for impedance and level matching instead of opamps is not a new one, it used to be used a lot in the real high-end studio gear of the 'good old days' ;) I should have a review in TNT Audio but it is taking FOREVER to be published. I think there is a conspiracy! Instead, I could PM you my press release if it is of any interest? The mods are extremely easy to fit, as I do them for you! I will not just sell instructions and components I'm afraid as I really don't want to get emails from people saying they blew-up the DEQ and it was my fault for not making the instructions clear or something. Maybe I need to make it clear on the site that the price is to have them installed, not just for the parts and instructions. Thanks very much, Simon