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NO SMOOTHING is applied to the shown plots. Most measurement sites have some smoothing applied which ‘irons flat’ sharp peaks and ‘wiggles’. I do not use smoothing because some info about sound quality is lost when plots are smoothed.

Aside from a small correction of the microphone itself also some correction in the lowest frequencies is applied to the plots to compensate for the perceived loss of bass when using headphones. This is described HERE in more detail.
A ‘horizontal‘ frequency response curve on the shown frequency response plots on this website thus indicates a perceived ‘flat’ tonal signature.

ALL measurements are made with a good SEAL on a flatbed measurement rig.
shape of your head, bone structure, pad size, pad ‘softness,  (compliance), hair or no hair and or wearing glasses may (drastically) change the frequency response of some headphones, so… your personal experience may differ substantially from these plots.

Frequency response (tonal balance) is the most sound-determining aspect of headphones. A horizontal line shows audible neutral response in the plots on this website. Deviations in different severities at different frequency bands have an effect on the sound character.
The bigger the deviation the stronger the effect.

Below an aid to help determining the sound character of headphones with relation to the frequency response.


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Beyerdynamic T50P


The model before the DT1350 and clearly inferior in all ways. The mechanical fit isn’t great for many, the headphones and cable is VERY microphonic  and even the headband is quite microphonic. The sound is coloured and not ‘accurate’ with a lot of bass but alas also a lot of honky mids. The highs are a bit coarse sounding. left, right

T50P stock L+R

Although it does not measure that bad I do not recommended this headphone…. certainly not worth the high price it used to go for.

I have problems with the adjustability of the headband which cannot be adjusted properly to my average sized head. The cups are still hanging too low on my ears even when set at its maximum height. My main gripe is with the pads. They are very small, do not compress much (feel soft but the foam inside doesn’t compress well) and are uncomfortable, are hard to position correctly (certainly with that headband) and it is very difficult to get a good seal (= bass).

Beyerdynamic now had upgraded the pads with their DT1350 and have recently upgraded these yet again. They also offer ‘velours’ pads which aren’t really velour but a kind of (faux) Nubuck Leather (hence the NL in the part-number EDT1350-NL). Beyerdynamic claims the sound is not affected.

As comfort is very important to me I ordered the NL pads. I did not order the newer pleather pads as these aren’t my preference. Also experimented with the slightly larger and more comfortable HD25 velour pads fitted on ‘adapters’. These are made of a cardboard ring that just fits in the pads and 2 pieces of foam-rubber rings with self-adhesive backs.

pad adapterThe T50P (as expected) seems very sensitive to pad changes. Below some plots of the same driver (the Left one) compared with other pads.

Below the T50P with stock pads versus T50P with the softer and slightly larger DT1350 pads. The bass levels are lower but so are the highs. In essence it has become a more mid-centric headphone that is less bright/detailed. The lift between 200Hz and 500Hz gives it a ‘cuppy’ sound.

T50P stock vs DT1350 pads

Below the T50P with stock pads versus T50P the faux Nubuck Leather EDT1350-NL pads. The mids and highs are affected in the same way but the bass is lowered by 10dB (a HALVING of SPL !) and it sounds like a dull cheap crappy headphone. Save yourself a lot of cash and don’t buy these pads for the T50P. The comfort did increase but the sound is awful.

T50P stock vs EDT1350-NL pads

Below the T50P with stock pads versus T50P with velour Sennheiser HD25 pads on the adapter. Almost a copy of the EDT1350 pads.

T50P stock vs HD25 pads on adapter

Below the T50P with EDT1350-NL versus T50P with velour Sennheiser HD25 pads on the adapter.

T50P with EDT1350NL(green) vs HD25 on adapter

The T50P is best served with the original pads OR the latest thicker EDT1350 pads (the pleather ones) which will make them less bassy sounding.
Have been experimenting with a filter circuit that lowers everything below 2kHz in level thereby increasing the highs so it doesn’t sound ‘dull’ any more.  Comfort is increased somewhat but the headband still makes it difficult to position it properly and getting a good seal.

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