Klipsch RF7 Posted February 8, 2004 Share Posted February 8, 2004 Hi Guys, I am looking for a quad set of NOS 7591's to compare to the EH 7591's i have in my Scott amp as of the moment. For those who have heard both, what is your take on them. I have been doing alot of research and some say there is virtually no diffrence while others say that the NOS sound better than the Electro Harmonix 7591's. Please give me your opinions and if anyone has a quad set to sell, ill surely buy them. Thanks Quote Link to comment Share on other sites More sharing options...
FLKlipscher Posted February 8, 2004 Share Posted February 8, 2004 NOS JAN Telefunken Quote Link to comment Share on other sites More sharing options...
Allan Songer Posted February 8, 2004 Share Posted February 8, 2004 I'm starting to like you, FLK! But why not NOS CV Bugle Boy? Quote Link to comment Share on other sites More sharing options...
Klipsch RF7 Posted February 8, 2004 Author Share Posted February 8, 2004 The Bugle boy and the JAN Telefunken seem to be mainly the 12AX7 tubes, i want the 7591A. Quote Link to comment Share on other sites More sharing options...
Allan Songer Posted February 8, 2004 Share Posted February 8, 2004 I was kidding! Never heard the Russian ones---I have no opinion. Quote Link to comment Share on other sites More sharing options...
leok Posted February 9, 2004 Share Posted February 9, 2004 GF Have you seen this? http://www.triodeel.com/7591.htm Leo Quote Link to comment Share on other sites More sharing options...
Klipsch RF7 Posted February 9, 2004 Author Share Posted February 9, 2004 Alright, I appreciate everyones help, I procured a quad set of NOS 7591A's from a good source. They are 4 closely matched 7591A tubes made by Sylvania. Two are Sylvania (one label is off), one is RCA labeled and one is GE, but all are Sylvania factory produced. These are the coin base octals from the early 1970s, and all measure right near 100 percent Gm (10,000 micromhos typical) plus or minus 4 percent. I bought the quad set at $200.00 USD plus shipping from www.audiotubes.com Quote Link to comment Share on other sites More sharing options...
joshnich Posted February 13, 2004 Share Posted February 13, 2004 Ryan, What is the difference between a 7591 and a7591a? I have been using a new quad of EH7591s in my MC225. I just bought another MC225 so I can run them as 50w mono blocks, My new MC225 has original RCA 7531as in it and it sounds awesome. The midrange and the overall presence compared to the EHs is dramatic. I am not going to monoblocks until I match the tubes. Is the coin base the only difference? Thanks Ryan josh Quote Link to comment Share on other sites More sharing options...
joshnich Posted February 13, 2004 Share Posted February 13, 2004 Thanks Ryan, You are so right on regarding the EH7591 vs the Westinghouse 7591 or7591a. Absolutely no contest!! josh Quote Link to comment Share on other sites More sharing options...
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