These Neve 511s have been kept in pristine condition, and are exactly like new. I bought them barely a year ago and have only used them about a dozen times (with incredible success). They were immediately put into my Neve lunchbox and kept there for their entire lifespan. I have a stereo pair if you are interested in both of them. They sound incredible, and the only reason I am selling them is because I no longer record from home, so I don't need this setup. I can't praise these pre-amps enough. They truly sound so good and so clean, it's impressive. The high pass filter is very musical, and the silk adds just the perfect touch of harmonics, and the ability to dial in the amount is truly built to perfection. What an incredible pair of pre-amps these are. Thank you Neve for the experience, and I can't wait for these to find a new owner who will love them as much as I have.