testing cd player output impedance

The 50 k-ohm is the impedence of the cd input of the pre-amp or receiver. Most are 47 k-ohm with an input sensitivity of 150 mV.

Hope this helps.
Rich

It doesn't tell you the output impedance but it does tell you that it is happy seeing a 50K load.

Richingoth, the load is actually before the source(just like speaker to amp). Jasljs, the specs tell you that the cd player will handle 10k load impedance or higher. If you are building a passive preamp, I would suggest a load impedance at about 20k. Load impedance at a minimum is just asking for distortion and phase shift in frequency response.