I’ve reviewed one Shure product, the SRH440. I liked it well enough. I’ll link my review just below. I’ve never seen anyone refer to the 440 and the 840 with a hyphenated E on the end as you have, and googling that didn’t get me anywhere. You had me excited about a new model for a minute!
Shure SRH440 Headphone Review: An alternate studio headphone that’s built like a Brick Wall
Shure has an almost 100 year history of making audio equipment. They’re particularly well-known for their high quality…
I’ve reviewed over 150 audio products in the last three years. Here’s a list of a bunch of them I compiled last summer, if you really want to go down the rabbit hole. You’ll find I’ve done some more since then, both on Medium and my personal web site.
I don’t keep this article updated any more, and when I originally wrote it, it was half in jest because a million people asked me how the M50X compared to everything. Thanks for reading!