One pair of copper Audio Consulting TVCs for sale. Ready to be soldered to your favorite selector switches and turned into an ultra premium inductive volume control. I bought them unused for this purpose but have since started a new job that has taken me completely away from DIY. I have a pair of Audio Consulting copper output transformers on one of my DACs and the sound is utterly sublime. These are sure to sound incredible. These are VERY hard to come by and - in fact all the unfinished AC parts seem very difficult to track down and when they can be found they are VERY expensive. Just go to their website and you can see. Comes with all the original tape labels to help you wire it up properly. These are absolutely cream of the crop trannies for a truly killer passive volume control. Rated 8/10 only because I've had them for two years and done nothing with them. Functionally they are 10/10. Buyer to pay shipping and fees. Cheers and thanks for looking.