I have been using a Wavac PR-X1 preamplifier for less than one year now. My unit has premium Mullard tubes that replaced the factory stock ones. This is my first tube preamplifier after about 20 years of using various solid state preamplifiers. Also, a comeback to my 60's-70's era when I employed only tube design preamplifiers. I use Discovery interconnects between the Wavac preamp and the power amplifier and I am very satisfied with the sound generally. I don't know anything about the recommendation of using any special interconnects in connection with the Wavac preamplifier since a preamp cannot be dependent of a certain brand/model of interconnect (such theory is a farce). The owner's manual for the Wavac PR-X1 does not say anything about any such requirement, or recommendation. If you intend to try various interconnects and options, you will do this on your own risk, expenses and time. If an interconnect would dramatically change the envisioned sound of a piece of electronics, preamp or power amp being the most handy examples, then there is something wrong with either the interconnects themselves -interfering too much in the way of the signal- or with the electronics, since the changes in sound should be only subtle, or minor, not obvious or drastic by their nature. In closing, you can use any decent brand name interconnect from the mainstream with very good results, and not necessarily a certain brand, or very expensive, or an exotic type of interconnect. There is no need for such kind of sophistication. Save your money, or use it wisely for something else of greater good or importance. We all eventually want to enjoy the music, and not to experiment all kinds of unnecessary tweaks or waste our time for no valid reason. And remember, an interconnect is always a subordinated accessory to the main electronics and never vice versa. Any decent brand name interconnect will be suitable for the Wavac preamplifier, as long as it is a known or proven as good and reliable brand name cable. If you will prefer a specific brand name interconnect based on audition test, or more suitable for your application, then this is simply something personal, and you must trust your decision. Regards, Emil - Hartford, CT, USA