[Ubetit]

I was going through a box of goodies and stumbled upon my old Sennheiser HD-40's. I don't know much about these anymore and these were never really used. Anyone have any details or specs for me. The yellow/orange pads are crumbling but I bought some black replacement pads a few years ago that I just installed. They sound pretty good through both my new JMT Meta42 and my 2 CMOY variants. The little amps run out steam however so these must be hard to drive.

Any specs are appreciated.

 

[akar]

Freq. Response: 20 - 18,000 Hz
Nominal Impedance: 600 ohms
Sensitivity at 1 kHz according to DIN 45 580: > or = 90 dB
Distortion according to DIN 45 500: < or = 1%
Power handling capability according to DIN 45 500, test conditions according to DIN 45 582: 0.1 W
Headband pressure: approx. 1.3 N
Weight without cable: approx. 60 g
Length of cable: 3 m


pics

 

[Ubetit]

Thanks for the post.