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Sennheiser HD 650's thin sounding?

Just received a new pair of HD650's to replace my dead HD580's and they sound so thin!!!

I'm using a Headroom home headamp with a NAD 542 CD, Kimber PBJ's and stock HD650 cable.

What is the deal with these phones? My 580's had much more bottom end slam and bloom in the mid bass? Is it a burn in issue or defective phones? Anyone have a similar issue?
loftus85
mcfarland
356 posts
 
IMHO....Sounds like either a loose connection or a bad set of phones. I don't believe that they should sound "thin".
metralla
945 posts
 
I've never owned the 650s but my 600s developed more fullness in the bass over time. Perhaps it is too early to definitively say the 650s are bass-light.

Regards,
elevick
2,636 posts
 
They will break in. However, I just replaced my 570's with AKG 701s and the difference is like moving from bose mini cubes to Thiels.
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