I have recently gone back to vintage receivers (Marantz 2215B, Pioneer SX-737, Sansui G-3000, all low end models recently acquired from my local thrift store) from dedicated headphone amps. Particularly because I I have come to enjoy Grados, or more accurately the Symphones Magnum, an ultimate Grado modded headphone by Rhydon. The reason I preferred the vintage receivers because they tended to warm up the Grado/Magnums while at the same time giving it more bass and soundstage (without sacrificing details to my ears) than dedicated headphone amplifiers.
But I just read an article/thread that explained that vintage receivers were more designed for high impedance headphones and not low impedance headphones. And therefore the sound of my Grado/Magnums that I'm experiencing as pleasant actually comes from impedance mismatch which results in warming up and increasing the bass of low impedance headphones. So if this is true, this leaves me at a quandary. So do I then ged rid of all my vintage receivers because what I'm finding pleasant is really poor impedance matching? Hm....
Anyone using these vintage receivers primarily with low impedance headphones (Denons, Grados, ATH's) and are preferring them to dedicated headphone amplifiers?
Edit: I wonder if impedance resistance adaptors will help.
Edited by sling5s - 12/17/11 at 8:43pm