Hi all. I’m a professional mix engineer and I use Sennheiser HD600 for a mix reference along with some decent nearfields ( Neumann, Kali etc ). I saw them in a few mastering houses and was recommended them buy a good mastering engineer. Overall I like them and I’m not unhappy with them but I find the low end a bit vague and they seem to have a hole in the sub 40hz range. Are there any suggestions for similarly detailed and neutral headphones with a better bass response? I’ve heard that the Sony MDR MV1’s go very low but I haven’t heard them. Budget is ideally under £400