Poor bass response

[stolz]

Hello,

I have a vintage pair of Realistic PRO-50 headphones which I believe are the same as the AKG K250 600 ohm. (Made for Radio Shack by AKG.) They sound fine except for a very poor bass response. If I play them through either a software or hardware equalizer with the base controls pushed up high I do get a better bass response. I am using them with a Schiit Magni 3 amplifier set on the high position. I also get the same results with other headphone amps.

Is this normal for this headphone?

Are there any modifications to the headphones that I can make to improve the bass response?

Many thanks in advance for any help.

 

[GREQ]

I used to own both of these.
Poor bass response is totally normal and to be expected, no matter what equipment you use them with.

There isn't much you can do about it unfortunately.
Using 'bassier' ear pads will very likely ruin the midrange and treble response, so your best option is using an equalizer.

EDIT:
Realistic Pro-50 and AKG K250 are NOT the same headphone.
K250 contains similar 'Diffuse Field' breathable damping material as the K241 (with the red dots, not the French K241 which was a K240 sextett variant)
Realistic Pro-50 contains the 6 'sextett' passive radiators.
This is the main difference (aside from the aluminium facade).