Excessive output voltage from cd player outputs

[percy]

I just happened to measure the output of my Pioneer DV-563A player for a 1Khz sine wave it was right at 1Vac ! The spec declares this value as 200mV. Seems to be playing fine with my Technics SA-EX140 stereo receiver that has an input sensitivity of only "27mV (200mV IHF '66)". Should I be concerned about this ? Would it affect the receiver (oftmof anything connected to the player's output) in any way ? What bothers me is why the big difference between the spec and actual value ?

I'd imagine the protection circuitry in the receiver is kicking in and safeguarding against overload but wouldn't it be a good idea to keep it under the max to begin with ? Would it make sense to use a voltage divider or even a series resistor to limit the signal ?

Also I am not quite sure how to interpret the spec. Is the max input voltage 27mV or 200mV ? What is this IHF '66 and why is that so much higher than the other ?

Thanks!

[Nigel Goodwin]

You're worrying over nothing!, as far as I recall the output of a CD player is something like 2V RMS maximum?. Also, in the amplifier the first thing it does is go through the volume control, so it's attenuated to be as quiet as you want.

A CD player outputs a line level signal, and your amplifier should have line level inputs for CD, AUX etc. - there's no problems at all.

[AndrewT]

Hi,
he's right, you have no problem.

The MAX output is 2Vrms +- a tolerance.
The average output will depend on the music type and how the production team have recorded the CD.

Expect the average to be about -10db (600mVac) to -20db (200mVac). All competent amp inputs will accept 200mV to 2V signal without any problem. NONE should be damaged by this level of input. If it were you would have replaced it with something better already.

Your only problem may be slight imbalance between different sources say TV, VCR, Tuner, etc. Some preamps and integrateds allow individual balance between sources to try to keep sound levels similar when changing over.