restorer-john
Grand Contributor
I haven't tried the headphone output from this Marantz player, but many of their less expensive disc players have a very decent headphone output. I use the headphone output on my Marantz CD-5004 player all the time with HD-600 headphones.
There's a whole lot of BS around headphone amplifiers in general. Unless your headphones are diabolically inefficient or of such impedance extremes as to classify them as faulty, most onboard disc player headphone stages are absolutely 100% fine.
My old CD players use NE-5532s with a 100R source impedance and I've never wished for anything more with my various flat impedance AKGs. Sure, I can swing more from a standalone preamplifier H/P jack, but going deaf has never been high on my bucket list...
Your 5004 (if it's the same H/P as the 5003) uses a NJM-2068, buffered and current limited with a 150 source resistance and capacitively coupled. The dedicated "you must have a H/P amp" guys would look down their noses at both of us, but mostly, they have no idea, have never tested or measured anything and base all their 'knowledge' on internet group think sites.
In short: do what works for you.