Many phono preamps we carry will amplify any cartridge on the market. However, on occasion you find the perfect match save for a few more notches of gain. It can make all of the difference. Our step up providers have been rolling this delicate iron for eons. Contact us and we can roll something specifically for your favorite cartridge or something that will work with a wide array of cartridges...there are many many combinations of rolling techniques, metallurgy and magnetics to consider. Please contact us for a consultation.