I don't think it's about ancient compatibility but rather just the fact that audiophile stuff tends to have it and if you are marketing to audiophiles, might as well design it that way. I have a pretty modern stereo receiver (Onkyo A-9010) as my computer's headphone amplifier and it has the bigger socket only. Same with my home theatre receiver (also an Onkyo).
But I believe there's no difference in listening experience. The bigger plug is probably a lot sturdier though. I've had some 3.5 mm jacks bend on me. Can't imagine that on the good ol' 6.3. I have totally busted a 6.3 mm to 3.5 mm adaptor though.
But I believe there's no difference in listening experience. The bigger plug is probably a lot sturdier though. I've had some 3.5 mm jacks bend on me. Can't imagine that on the good ol' 6.3. I have totally busted a 6.3 mm to 3.5 mm adaptor though.