Beyerdynamic T 51 p Tesla Headphones Review
Pint-sized luxury: Who knew on-ears could be this comfortable?
Put to the Test
As with every other set of cans we spend time with, the Beyerdynamic T 51 p Tesla headphones were thrown into the audio lab for a day of rigorous testing. Whatever the trial in question, time and time again I noted quality results: The frequency response is well-balanced, there is absolutely zero audible distortion, and volume remains nicely balanced between left and right speakers. Below, we break down the results for you.
The T 51 p is a real crowd pleaser, as its frequency response shows. Although the sound quality here is, in the end, quite founded in bass, the overall balance is such that delicate details are still quite audible, too. Instead of ramping bass up in volume, the T 51 p on-ears stick to a mostly flat response in the lower portion of the range. Bass frequencies of 80dB-100dB do get about 5dB of emphasis, but this is very modest compared to what you find on most products these days.
Yet bass is nevertheless quite prominent on the whole. That's because these Beyerdynamics also drop emphasis on some of the midrange; from 2kHz-4kHz, volume falls to 63dB. Since some of those aforementioned bass frequencies meanwhile live between ~75dB and ~84dB, music sounds very full in the low end. Nevertheless, middle and high frequencies are allotted enough emphasis that music retains its details, even with the eminent bass.
Talk about passing tests with flying colors: The T 51 p produced zero audible distortion from top to bottom. This is stellar. Generally, we hope to measure less than 3% of total harmonic distortion (THD) throughout the bass, middle, and high range, but these on-ears keep measures below 1.5% throughout most of the range.
Be sure to keep volume to a safe level, though, because if you increase it to more than 107.5dB, THD rises to more than that 3% mark—damaging your music with unwanted sounds and clipped harmonics.
For isolation, my test results for these Beyerdynamics run from great to just okay. The T 51 p will make quick work of high-pitched unwanted sounds, reducing them to more than 1/16 their original loudness.
Don't expect much relief from grumbling, bassy irritants, though. A passing truck might be quieted to about half its volume, at most, but some low frequency sounds won't be blocked at all.
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