Pros: Very comfortable ear pads, excellent clarity and definition
Cons: Soft grip on ears means that they could slip off while very active
The GMP 450 is the closed back cousin of the GMP 400, which has an open back design.
The sound is very similar to the open back GMP 400, but with a little more bass response and narrower soundstage. Very impressive though for a closed back design.
Interestingly, I found that the GMP 450 requires a decent quality headphone amp (I had them hooked up to an Icon Audio HP8) to really make them sing, whereas the GMP 400 was more flexible about it's source.
The earcups are mounted on what German Maestro call a cardomatic suspension system. The result is a feather soft grip around the ears that readjusts as you move and stays pretty secure (as long as your not really active). The cardomatic suspension is really rather clever.
Handbuilt in Germany and coming with a 3 year warranty, the GMP 450 from German Maestro is a very impressive closed back headphone.
A class leading closed back headphone that is equally at home in the studio or at home. Nicely made, very comfortable and sound that is both refined and balanced. Highly recommended.