If the headphones you are trying to use are mono and over 8w then yes. you need a headphone pre amp. id ensure the power supply is all the way in and that it is set to default settings to ensure you didnt trip any of the equalizing or bridge features for the headphones
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If the headphones you are trying to use are mono and over 8w then yes. you need a headphone pre amp. id ensure the power supply is all the way in and that it is set to default settings to ensure you didnt trip any of the equalizing or bridge features for the headphones
thanks,
Nate