BOC CDs, was Re: BOC We gotta get out....

[Colin Shayler]

Plugging the CD player into your phono socket would be a mistake
on 2 grounds:

1) As has been suggested, the CD output is 2 volts peak to peak
   whereas the average phono socket expects an awful lot less
   (cannot remember the exact figures, but can find out if you
   want, it also varies between Moving Magnet and Moving Coil
   stylii).

2) There is a strange thing called the RIAA frequency response
   curve (this sometimes gets mentioned on LP sleeves) which
   corrects the fact that there are a lot more high frequencies
   on vinyl than low frequencies (something to do with it being
   harder to cut low frequencies into vinyl than high
   frequencies).

You can correct for both problems (attentuation and a filter that
acts as the inverse of the RIAA filter in your phono pre-amp),
but the abuse on the CD signal would make things worse, not better.
I am afraid that I am new to this newsgroup and am not totally
sure what you are trying to do (I did not see the original email).

Colin

> On Fri, 8 Sep 1995, Vince LeGrand wrote:
>
>I have always wondered, however, whether these CDs would
>sound better if the CD player were plugged instead into the phono
>input of the amplifier...
>
> Paul...don't do that. the phono input on your stereo is designed for an
> input level that is about 1/100 as high as the CD or AUX input.  If you
> connect your CD player to the phono input, you will probably fry your phono
> preamp.
>
> Ok... so how about if you did 99% signal attenuation it first?  I'd _love_
> to come up with a workable fix to this problem, because I have a lot of
> CDs that sound like absolute shit because of it.
>
> C'mon, some of you EEs out there, earn your keep.  ;-)
>
> Steve
>