You're welcome, Pal. Carl, all CAT's, including the Signature Mark II and prior had the same tube complement as what I listed under the response to Pal's question. If there was a phono stage there would be 10 tubes insteand of 5. Unlike the line section, the phono section had 3 6DJ8/6922/7308's and 2 12AX7's. All CAT's with phono section have 10 tubes. All CAT's with line section only have 5 tubes.