How long can you extend a 3.5 mm audio cable?
2.5mm, 3.5mm (also called headphone cables), and ¼” audio cables have a maximum distance of 150′ on average. Off-the-shelf, standard audio cables will be rated with 150′ in mind.
Do aux extenders reduce quality?
Generally a cheap extension cable will deteriorate the sound quality, although you shouldn’t be worried as watching movies and gaming isn’t a critical listening session. Another option would to get your cans recabled with a longer cable.
Does 3.5 mm extension cable affect quality?
Headphone extension cables typically do not affect the audio quality of headphones. However, if you end up with a cheap or defective extension cable, you may notice audio quality issues.