I have confirmed that using Headphones, there is static/hissing/buzzing noise (Sounds almost like gain distortion)

Quad Cortex
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41

This is my newer one.

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Did that eliminate the headphone noise?

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im using 300 Ohm headphones and im getting lot of ground hiss,sound very bad

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Not sure if this is the same or similar of any issues that have been mentioned here, but I do notice when playing bass into the QC and using only headphones, thereā€™s a little crackle that seems to be always present. At first I thought it was the gain on the amp, but seems to always be present. Itā€™s not deal-breaking, but definitely noticeable if Iā€™m listening for it. I havenā€™t tried other headphones or plugging in another output yetā€¦

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could be itā€™s just too much for those particular drivers in the HPs.
What model are they?

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I too am experiencing the same thing. When picking notes it distorts if you attack the notes, even at a reasonable volume level. I have checked the input and HP levels and they are not clipping.

For reference, I am using IEMā€™s.

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So I tested it again with my HD800S headphones which are 300 ohm, verses my IEMā€™s which are 10 ohm, and the distortion is noticeable decreased. There is only a small amount when attacking cords say. This tells me that the headphone stage on the QC isnā€™t that great.

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Hi Everyone,

I found this thread because I had a huge hiss noise with my QC when I plugged headphones. (Headphones are DT 770 Pro X, being 45 Ohms).

I tried with regular DT 770 (those ones are 250 Ohms), and I confirm that the hiss noise is way way more discret. Still a bit there but very acceptable.

In any case, I admit this is just very ā€œsuprisingā€ that the QC heaphones output is not great quality, on such an expensive device.

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