To S. Andrea Sundaram,

I read your review of the Stax SR-507, and I have to say I agree with your comments regarding the other high-end headphones. I have owned the Beyerdynamic T1 briefly and Sennheiser HD 800 for a few months and Audeze LCD-2 for 20 months. The LCD-2 was the most tolerable and I loved ‘em for this time, but a few months ago I bought the Shure SRH1840 and these are the ‘phones I was always hoping for. My system is an Arcam D33 DAC and Borbely all-FET amp. I have recently bought a used Stax SR-507 and am making a Kevin Gilmore SSHV amp to drive them.

Which will become the favored system?

Geoff Clarke

We contacted Shure about getting a review pair of the SRH1840s, but never heard back. I've looked at their measurements on the HeadRoom website, and, though the frequency response looks remarkably neutral, the high-order distortion products are a little troubling. Not having heard them, I can't say which setup would be better. They may have different strengths and weaknesses. When you have your amp built, tell us what you think. . . . S. Andrea Sundaram