So I'm planning to use a set of Q701 to listen to my vinyl LPs and computer. I have two 2-channel stereo rigs (one main/living room and one bedroom/office) and I'd like to be able to use the headphones with both of them:
The bedroom setup is based around a circa-1990 Nakamichi 'Receiver 2' (55 WPC at 8 ohms for speakers) that has a headphone rated output of 129 mW into 40 ohms.
The main setup is based around a Yamaha CR-2040 receiver from 1979 (120 WPC at 8 ohms for speakers). I've been poring over the schematics and service/retail manuals but I haven't been able to figure out what the rated output for headphones is. The receiver has two 1/4" jacks ("Headphone A" & "Headphone B") which appear to be on the same circuit as the speaker outs. FWIW, it seems pretty capable.
My first question is whether each of these is adequate to run the Q701 well (I know the CR-2040 is probably more of a guess ATM than anything else), or if I'm going to be better off running them off of something like a Magni or O2 connected to each receiver's Tape Out.
My second question is whether the Q701 can be used with a line splitter (either run off of the receiver or a dedicated headphone amp) in order to connect another set of headphones (either a second set of Q701 or something else entirely). This isn't super-duper important, but it would be really nice so that my girlfriend and I could listen to records together without bugging my roommate.
Thanks for any advice! It would be really appreciated!