Any length limitation on TT ICs

apphd
apphd Posts: 1,514
edited May 2011 in Electronics
Replacing the belt on my Dual CS 5000 TT, and plan on upgrading the stock ICs that were on it when manufactured. At the same time I also want to lengthen them. This will be running a MM cart on the stock low mass tone arm using the phono input of a Parasound 2100 pre. Should I have any concerns on max. length or material/capacitence?
Post edited by apphd on
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  • [Deleted User]
    [Deleted User] Posts: 7,658
    edited May 2011
    Hello,
    It is possible that your phono cartridge could be adversely affected by increasing the total capacitance of the extra connecting cable. It might be a good idea to check with the cartridge manufacturer and find out what the best loading is before adding too much. Do you know the capacitance per foot is for the cable you're using? Is there any loading built in the preamp?
    Regards, Ken
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  • apphd
    apphd Posts: 1,514
    edited May 2011
    Hi Ken thanks for the reply. Haven't purchased any cable yet, or determined how long I would like the length to be. Just starting to plan it out and getting my learn on. I'll have to give Parasound a shout to get the specifics of the MM input side of the preamp. They list a general 30k ohm input impedance but I do not see any break down for the MM or MC phono input. My overall plan is to mount this on a wall mounted isolation shelf, which I have not pin pointed the location yet, but probably 8' - 10' (maybe a little less) between TT and pre. But I would like to give me as much length as possible for more options.
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  • [Deleted User]
    [Deleted User] Posts: 7,658
    edited May 2011
    The big variable is the phono cartridge. The series capacitance of the connecting cable and the loading capacitance in the phono preamp can form a low pass filter when combined with the characteristics of the cartridge. The filter point could be close enough to the upper hearing range that some effect could be noticeable. Some types of cartridges are not bothered by capacitance loading, others are. Most moving magnet types are, but your manufacturer can advise on that. Once you know what the target loading is you can determine what the phono stage offers, then the choice of the connecting cable can be made.
    Cheers, Ken
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  • treitz3
    treitz3 Posts: 19,480
    edited May 2011
    Thanks Ken. I've been thinkin' about doing the same thing to my LP player. Now I know where to start.
    ~ In search of accurate reproduction of music. Real sound is my reference and while perfection may not be attainable? If I chase it, I might just catch excellence. ~
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  • [Deleted User]
    [Deleted User] Posts: 7,658
    edited May 2011
    No problem, glad to be of help.
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