deckard1 Posted February 13, 2022 Share Posted February 13, 2022 Hi, My apologies if this has been brought up before by someone else. I just upgraded to a new 14" MacBook Pro (M1 Pro) and noticed that the headphone output has absolutely no low end when connecting headphones. It's like a high pass filter is being used. I'm listening with Sony 7506 studio headphones and the sound is unbelievably thin. Nothing wrong with the headphones either. Has anyone else noticed this and is there a workaround? Thanks. Quote Link to comment Share on other sites More sharing options...
David Nahmani Posted February 13, 2022 Share Posted February 13, 2022 That's odd. Are you used to those headphones, are you familiar with how they sound? If you are and are convinced that they are not sounding as you're used to, then I would recommend you bring the MacBook to an Apple Store for testing? Quote Link to comment Share on other sites More sharing options...
deckard1 Posted February 13, 2022 Author Share Posted February 13, 2022 (edited) That's odd. Are you used to those headphones, are you familiar with how they sound? If you are and are convinced that they are not sounding as you're used to, then I would recommend you bring the MacBook to an Apple Store for testing? Oh yes...have had these specific headphones for 5 years. Very familiar with them. What's strange is Bluetooth AirPods sound fine. Also, I had another 14" MacBook Pro before I upgraded to this specific 14" MacBook Pro and same problem on both brand new computers. Weird, huh? Great idea, David. Thanks! I just made an appt for today to bring my 14" MacBook Pro into the Apple Store. Will report back and update this thread on what the Apple Store finds after I go to the appt. Edited February 13, 2022 by deckard1 Quote Link to comment Share on other sites More sharing options...
David Nahmani Posted February 13, 2022 Share Posted February 13, 2022 It could be an impedance mismatch: check the headphones impedance, and the headphone output impedance on your MacBook? Quote Link to comment Share on other sites More sharing options...
deckard1 Posted February 13, 2022 Author Share Posted February 13, 2022 It could be an impedance mismatch: check the headphones impedance, and the headphone output impedance on your MacBook? Sony 7506 are 85 Ohms for impedance according to Internet. How do I check the computer headphone output impedance on my MacBook? Quote Link to comment Share on other sites More sharing options...
David Nahmani Posted February 13, 2022 Share Posted February 13, 2022 Sony 7506 are 85 Ohms for impedance according to Internet. How do I check the computer headphone output impedance on my MacBook? I wonder if this is due to the new automatic impedance detection feature: https://support.apple.com/en-us/HT212856 Quote Link to comment Share on other sites More sharing options...
deckard1 Posted February 13, 2022 Author Share Posted February 13, 2022 Sony 7506 are 85 Ohms for impedance according to Internet. How do I check the computer headphone output impedance on my MacBook? I wonder if this is due to the new automatic impedance detection feature: https://support.apple.com/en-us/HT212856 That has to be it then. UPDATE: I just listened with wired Apple EarPods going into the headphone jack and it sounds great. No problems whatsoever. So, it's definitely the impedance mismatch with the Sony 7506's I would think. Quote Link to comment Share on other sites More sharing options...
TheRdungeon Posted February 14, 2022 Share Posted February 14, 2022 Could be that the Sonys are hard to drive but don't meet the threshold to trip into the higher voltage, it's kinda a pain with this new headphone amplifier, it's actually lower voltage than before unless your headphones are over 150ohms. It would be much more ideal if we had a way to manually switch it Quote Link to comment Share on other sites More sharing options...
HelenaMaria Posted February 14, 2022 Share Posted February 14, 2022 I think the macbook should be checked. Quote Link to comment Share on other sites More sharing options...
deckard1 Posted February 14, 2022 Author Share Posted February 14, 2022 Well...I went through two advisors at Apple and the problem turned out to be my Sony MDR 7506 headphones after all. So, David was right initially. Quote Link to comment Share on other sites More sharing options...
MikeRobinson Posted February 17, 2022 Share Posted February 17, 2022 He usually is ... Quote Link to comment Share on other sites More sharing options...
David Nahmani Posted February 18, 2022 Share Posted February 18, 2022 Quote Link to comment Share on other sites More sharing options...
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