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CD signal into a phono stage?

I'm trying to sell an integrated amp. Although I have no real reason to believe that there is a problem with the phono stage (since I've never used it), I think it might be a good idea to check it to make sure. How can I do this? Is it OK to run my CD player through the phono stage? Would the signal be too strong and fry the circuit? How about a tuner? There are actually two phono stages - it's switchable between MM and MC. Can I check both stages with a CD player or tuner? If not, any other ideas?

Thanks
Don
hessong

Showing 2 responses by buscis2

buscis2's avatar
buscis2
468 posts
 
Hessong, you can in fact use a CD player to "test" your phono section providing you are using a player with a variable output. Many players, Levinson, Sony, Denon, Cary, Audio Aero, etc. do provide you with variable outs. Some actually attenuate in the digital domain which obviously would not apply in your application.

Of course, begin testing with the volume control at it's absolute minimum output level and you should have no problems. All of the above is assuming you are "testing" only.
buscis2's avatar
buscis2
468 posts
 
Sidssp, I have to assume Hessong is simply testing to assure that the phono circuits are passing signal. But, of course you know what happens when you assume. I am not in any way implying that this could be used for "listening" tests. Most CD players with variable outs will have an output level as low as 0.1v. which in no way will harm the actual phono circuit, although it will allow you to test for signal pass. But your correct, it won't sound great.
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