2. analog
  3. 1248625946

phono preamp crackling

i recently added analog to my system and i'm having a problem. my phono preamp will often emit crackling noises. this occurs even when i take the stylus off the record--the crackling will continue.

i've tried locating the preamp in different locations--above the turntable (very bad), below the turntable (better but not good) and as far from my integrated amp as i can, which isn't too far, about 1.5 feet above the amp. the impedence and gain settings on the preamp are at the recommended level for my MM cartridge.

if location of the phono preamp is the problem then i'm in trouble, as i don't have many options for where to put it.

the phono preamp is connected to my integrated amp using balanced cables. the system is: marantz 15s1 tt, ps audio gcph phono preamp and cambridge audio 840v2 integrated.

any suggestions on what to do or what the problem might be?

thanks!
tanglewood

Showing 2 responses by newbee

newbee
4,751 posts
 
Noisy tubes? Phono stages usually require quality LN (low noise) tubes and crackling is one of the symptoms of noisy tubes. What kind and quality tubes do you have in the stage? How old are they?
newbee
4,751 posts
 
OK I'm a dump shit with a strong preferences! :-)

That said, have you tried disconnecting the IC's from your TT (cartridge) to the phono stage? If not try that, leaving the IC's to the pre-amp in place and seeif that changes anything. The phono stage might be fine but the IC's from the TT/cartridge to the phono stage could be the ones picking up stray magnetic fields, as opposed to the IC's from the phono stage to the pre-amp.
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