Headphone Volume difference when connected to iPad and iPhone via Bluetooth.

I recently purchased JBL Jr310BT Headphones. On my iPad the volume is perfectly acceptable. On my iPhone sound is very faint, even when at maximum volume on the phone. Any suggestions?

iPhone 15 Pro, iOS 18

Posted on Jul 10, 2025 7:42 AM

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Posted on Jul 10, 2025 1:13 PM

Thanks for taking the time to reply. I resolved the problem earlier but couldn’t upload my reply for some unknown reason. It was that ‘Reduce Loud Sounds’ had been turned on. Once I turned it off, the problem was resolved. Thanks again.

3 replies

Jul 10, 2025 11:42 AM in response to Pete79Edinburgh

When a pair of Bluetooth headphones like your JBL Jr310BT works fine on one device but is super quiet on another, it usually points to either a software setting or a Bluetooth codec/configuration mismatch.


See if any of the following can help:


Check Volume Limit / Reduce Loud Sounds (iPhone)

  1. Go to: Settings > Sounds & Haptics > Headphone Safety
  2. Make sure "Reduce Loud Sounds"*is turned off.


Reset Bluetooth Connection

  1. Forget the headphones on your iPhone: Settings > Bluetooth > Tap the (i) next to JBL Jr310BT > Forget This Device
  2. Then re-pair them from scratch.


Turn Off Mono Audio or Audio Balance Tweaks

  1. Go to: Settings > Accessibility > Audio/Visual
  2. Make sure Mono Audio is off
  3. Check the left-right balance slider is centered

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Headphone Volume difference when connected to iPad and iPhone via Bluetooth.

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