If you are looking for pre-amp kit, you definitely should consider Grounded Grid from Transcendent. Their url is: www.transcendentsound.com. I saw people were discussing OTL kits on their bulletin board, but I only found the pre-amp kit. Not OTL power amp kit. Also, I heard that Transcendent is planning for future product, and I am still waiting to see if they are going to have OTL amp kit.
