Hello all, I hope you can help me out. I have a small home studio, it's just for fun at the moment - playing around with making downtempo <120 BPM House and Techno. I live in a tiny flat and I don't want to upset the neighbours so most of my work needs to be done on headphones. I have a pair of Adam AX5 monitors - which are great, but I can only use them when the neighbours are out. Basically what I need is an headphone amp, just an amp - because the the DAC needs to be ASIO compliant. I currently have: Steinberg UR22 MK2 Audio interface - It's basically a ASIO compliant external PC soundcard in a box Headphones: Sony MDR-CD900st Grado 325e Hifiman HE560 And a pair of Massdrop Sennheiser HD 6XX due next month (Basically 650s) What I need is a flat, accurate amp - that will be good for all the above. I've just got a cheap little Bravo 2 valve amp - and it's OK but the HE560's need more power - a lot more, I'm looking to spend £500-ish on the amp but might go for more if it's worth it. Any advice is welcome. Thanks in advance.