turntable setu-up

Well, I got myself a test record.

Dont know why I never have before, but anyway....

Ive discovered that at 10mhz my arm/cart resonantes badly enough to physically shake. At 12mhz, the effect is so bad I had to stop it before my speaker cones popped out!!

Also, at high decibels the sound becomes distorted through my tweeters, and the sound is a little louder through one channel.

Oh yeah, and flutes played loudly cause quite a lot of distortion.

Should I give up now?!?! lol

Anyway, just wanted to ask if ... well, if that is so far off the norm I should stop right away and .. I dunno take it to hospital or something?

What do other people get when they use test records? Is the massive resonance thing at 10-12mhz normal? normalish?!!

Hellllpppppp!!!!!

 

If you mean 10-12Hz then the resonance is normal. It's the resonance between the cartridge compliance and the arm effective mass. It's supposed to be between warp type frequencies (say less than 5Hz) and audibility (conventionally 20Hz.)

Paul

 

If I remeber correctly, some phono stages used to incorporate a high pass filter at about 20Hz to prevent speaker damage at these resonant frequencies.