If you have read our website then you probably know that we have an AD30HTC in the studio. This is Bob's favorite set of tubes for it. This kit uses a matched quad of the JJ EL84's and a JJ GZ34 for power. For channel one we use a gold pin long plate ECC803S for V1 and a balanced gold pin ECC83S in V3. In the second channel we use two gold pin ECC83S's with one balanced for V4. This setup is designed to enhance the natural character of both channels. Sweet and chimey cleans with smooth buttery leads. Just let us know in the comments section if you're looking for an early breakup, a moderate breakup or a later breakup for more headroom in which case we will choose the coolest grades we have available for the power tubes.