[vesnuxa]

I'm looking for any suggestions on how to reduce the output from my source, a Sony XA5400ES CD player.

I run the CD player to my headphone amp, either a iFi Pro ican, or a Woo WA22 amp. With any of my headphones

which are high or low efficiency, high or low impedance, I can only turn the volume up 1 or 2 notches, or below 9 o'clock.

There is no volume adjustment on the Sony, unlike my Oppo 105D.

Can I put anything in-line to reduce the output?

Thanks!

 

[Roseval]

Bit weird as to the best of my knowledge, CD player output is standardized at 2V. One expect the amps to cope with this.
Any option to reduce the gain on the amps?
You might try a passive inline attenuator.