Best Answer Dunkin_Dal , 30 September 2013 - 05:38 PM
The Line 6 FAQ on Headphones has this...
Q: What is the recommended headphone ohm rating for use with Line 6 products?
A: For devices with a 1/4" output, we recommend headphones rated between 150-600 ohm (pro or semi-pro level) studio headphones for best results. For those with an 1/8" output, headphones designed for MP3 player usage are usually a good match. Results may vary between headphone models and manufacturers.