# No sound from Headphones Output **URL:** \ **Category:** Quad Cortex\ **Created:** [May 24, 2025, 2:23pm UTC](https://unity.neuraldsp.com/t/no-sound-from-headphones-output/18412 "2025-05-24T14:23:43Z")\ **Posts on this page:** 17\ **Page:** 1
**Author:** ![SimoneMularoni](https://avatars.discourse-cdn.com/v4/letter/s/3d9bf3/32.png) [@SimoneMularoni](https://unity.neuraldsp.com/u/SimoneMularoni)\ **Post date:** [May 24, 2025, 2:23pm UTC](https://unity.neuraldsp.com/t/no-sound-from-headphones-output/18412/1 "2025-05-24T14:23:43Z")
Hi everyone! I’m having an issue with the headphone output on my Quad Cortex. I can see the signal coming through the meters, and outputs 1/2 and 3/4 are working fine. However, when I plug headphones into the headphone jack, there’s no sound at all — even with the volume set to 100%. I’ve already tried resetting the unit to factory settings, but that didn’t help. The headphones obviously work perfectly with other devices, and I’ve set the outputs correctly in my presets. Any ideas? ---
**Author:** ![holba](https://avatars.discourse-cdn.com/v4/letter/h/ebca7d/32.png) [@holba](https://unity.neuraldsp.com/u/holba)\ **Post date:** [May 24, 2025, 2:53pm UTC](https://unity.neuraldsp.com/t/no-sound-from-headphones-output/18412/2 "2025-05-24T14:53:34Z")
Are you sure, you plug your headphones to the headphones jack? ---
**Author:** ![SimoneMularoni](https://avatars.discourse-cdn.com/v4/letter/s/3d9bf3/32.png) [@SimoneMularoni](https://unity.neuraldsp.com/u/SimoneMularoni)\ **Post date:** [May 24, 2025, 2:54pm UTC](https://unity.neuraldsp.com/t/no-sound-from-headphones-output/18412/3 "2025-05-24T14:54:20Z")
yep, 100% sure. ---
**Author:** ![MP\_Mod](https://avatars.discourse-cdn.com/v4/letter/m/ccd318/32.png) [@MP\_Mod](https://unity.neuraldsp.com/u/MP_Mod)\ **Post date:** [May 24, 2025, 3:00pm UTC](https://unity.neuraldsp.com/t/no-sound-from-headphones-output/18412/4 "2025-05-24T15:00:07Z")
What is your HP volume in the pull down settings? ---
**Author:** ![SimoneMularoni](https://avatars.discourse-cdn.com/v4/letter/s/3d9bf3/32.png) [@SimoneMularoni](https://unity.neuraldsp.com/u/SimoneMularoni)\ **Post date:** [May 24, 2025, 3:02pm UTC](https://unity.neuraldsp.com/t/no-sound-from-headphones-output/18412/5 "2025-05-24T15:02:04Z")
At the moment, the headphone volume is at 0.0 dB, but nothing changes whether I raise or lower it. As I mentioned before, though, I can see the signal coming out on the meters (both the HP level and the Multi Out ones). ---
**Author:** ![MP\_Mod](https://avatars.discourse-cdn.com/v4/letter/m/ccd318/32.png) [@MP\_Mod](https://unity.neuraldsp.com/u/MP_Mod)\ **Post date:** [May 25, 2025, 4:10pm UTC](https://unity.neuraldsp.com/t/no-sound-from-headphones-output/18412/6 "2025-05-25T16:10:20Z")
I would try backing up your QC with Cortex Control, perform a factory reset and restore. If that doesn’t resolve things, please email [support@neuraldsp.com](mailto:support@neuraldsp.com) and they will get you sorted quickly. ---
**Author:** ![SimoneMularoni](https://avatars.discourse-cdn.com/v4/letter/s/3d9bf3/32.png) [@SimoneMularoni](https://unity.neuraldsp.com/u/SimoneMularoni)\ **Post date:** [May 25, 2025, 7:02pm UTC](https://unity.neuraldsp.com/t/no-sound-from-headphones-output/18412/7 "2025-05-25T19:02:04Z")
yeah, done that already and no luck. I’ll contact the support, thank you. ---
**Author:** ![xush](https://sea2.discourse-cdn.com/flex020/user_avatar/unity.neuraldsp.com/xush/32/5100_2.png) [@xush](https://unity.neuraldsp.com/u/xush)\ **Post date:** [May 25, 2025, 9:41pm UTC](https://unity.neuraldsp.com/t/no-sound-from-headphones-output/18412/8 "2025-05-25T21:41:48Z")
when you adjust the master Vol wheel and the assignment menu appears momentarily, it the HP box checked for monitoring? Could it have been accidentally locked at an inaudible level? Not sure that can happen, but that’s the only other area that could affect output levels ---
**Author:** ![SimoneMularoni](https://avatars.discourse-cdn.com/v4/letter/s/3d9bf3/32.png) [@SimoneMularoni](https://unity.neuraldsp.com/u/SimoneMularoni)\ **Post date:** [May 26, 2025, 7:06am UTC](https://unity.neuraldsp.com/t/no-sound-from-headphones-output/18412/9 "2025-05-26T07:06:05Z")
nope, it’s all checked and at a proper level, already checked ☹ ---
**Author:** ![aoloso](https://avatars.discourse-cdn.com/v4/letter/a/dec6dc/32.png) [@aoloso](https://unity.neuraldsp.com/u/aoloso)\ **Post date:** [May 26, 2025, 8:40am UTC](https://unity.neuraldsp.com/t/no-sound-from-headphones-output/18412/10 "2025-05-26T08:40:28Z")
Is the signal dynamically changing while playing the guitar or is it static / frozen? Sometimes when i start the QC while changing some I/O stuff before power on the Device, it has a bug, which shows frozen/static Output levels. Only thing what helps is power off the QC unplugging everything (speaker cables, usb, guitar input etc) except the power cable. Starting the Qc and THEN plug everything back in. Maybe try this. ---
**Author:** ![SimoneMularoni](https://avatars.discourse-cdn.com/v4/letter/s/3d9bf3/32.png) [@SimoneMularoni](https://unity.neuraldsp.com/u/SimoneMularoni)\ **Post date:** [May 26, 2025, 10:38am UTC](https://unity.neuraldsp.com/t/no-sound-from-headphones-output/18412/11 "2025-05-26T10:38:57Z")
thanks for helping, but I tried all these already (I always plug stuff after I power on the unit) and nothing happens. so strange since the unit is almost brand new! ---
**Author:** ![MP\_Mod](https://avatars.discourse-cdn.com/v4/letter/m/ccd318/32.png) [@MP\_Mod](https://unity.neuraldsp.com/u/MP_Mod)\ **Post date:** [May 26, 2025, 2:40pm UTC](https://unity.neuraldsp.com/t/no-sound-from-headphones-output/18412/12 "2025-05-26T14:40:24Z")
I forgot to ask, are you powering with the OEM power supply? ---
**Author:** ![SimoneMularoni](https://avatars.discourse-cdn.com/v4/letter/s/3d9bf3/32.png) [@SimoneMularoni](https://unity.neuraldsp.com/u/SimoneMularoni)\ **Post date:** [May 26, 2025, 3:43pm UTC](https://unity.neuraldsp.com/t/no-sound-from-headphones-output/18412/13 "2025-05-26T15:43:46Z")
yes, the original one that came with the unit. ---
**Author:** ![BenM](https://sea2.discourse-cdn.com/flex020/user_avatar/unity.neuraldsp.com/benm/32/3468_2.png) [@BenM](https://unity.neuraldsp.com/u/BenM)\ **Post date:** [May 26, 2025, 8:50pm UTC](https://unity.neuraldsp.com/t/no-sound-from-headphones-output/18412/14 "2025-05-26T20:50:55Z")
Sorry, can’t help, but your nickname is great, so underrated guitarist ! 😁 ---
**Author:** ![SimoneMularoni](https://avatars.discourse-cdn.com/v4/letter/s/3d9bf3/32.png) [@SimoneMularoni](https://unity.neuraldsp.com/u/SimoneMularoni)\ **Post date:** [May 26, 2025, 9:02pm UTC](https://unity.neuraldsp.com/t/no-sound-from-headphones-output/18412/15 "2025-05-26T21:02:19Z")
AHAH thanks! well, it’s my actual name 😃 ---
**Author:** ![xush](https://sea2.discourse-cdn.com/flex020/user_avatar/unity.neuraldsp.com/xush/32/5100_2.png) [@xush](https://unity.neuraldsp.com/u/xush)\ **Post date:** [May 26, 2025, 9:19pm UTC](https://unity.neuraldsp.com/t/no-sound-from-headphones-output/18412/16 "2025-05-26T21:19:06Z")
I sure wish we could figure this out but it seems you’ve exhausted all possibilities except for mechanical failure. Let us know what support says, it’ll likely need a repair. ---
**Author:** ![SimoneMularoni](https://avatars.discourse-cdn.com/v4/letter/s/3d9bf3/32.png) [@SimoneMularoni](https://unity.neuraldsp.com/u/SimoneMularoni)\ **Post date:** [May 26, 2025, 9:39pm UTC](https://unity.neuraldsp.com/t/no-sound-from-headphones-output/18412/17 "2025-05-26T21:39:19Z")
yeah, you’re right. thanks to everyone for the help!