Speaking technically, let's start by looking at some specifications.
Frequency response: 18 - 28.000 Hz
Impedance: 40 Ohm
SPL@1kHz, 1V RMS: 99 - 104 dB
Cable length: 1,0 m + 1,8 m = 2,8 m / 9,2 ft.
Jack: 3.5 mm (6.3 mm converter included)
Frequency response: 80 - 15.000 Hz
Impedance: 2K Ohm
Pick-up pattern: Uni-directional
Sensitivity (1V/P@1 kHz) -38 dB
On closer examination we can see that the Siberia Red has been provided with a frequency response figure of 18Hz-28,000Hz which is very good indeed, meaning in short that these headphones should pack some acoustic punch.
Sound pressure levels generated are given at a healthy 99-104db at 1 KHz which will be ample for generating more than enough gain to satisfy most users I would say.
Now, with the microphone side of things frequency response is given at 80Hz-15,000Hz which is plenty for a microphone intended for the uses that this one is.
The microphone pick-up pattern which is the way in which the diaphragm picks up sound is given as uni-directional, which means that it picks up sound from one direction only, as opposed for example to an omni-directional microphone which picks up sound from 360 degrees all around.
From a technical standpoint there is not a great deal more to discuss here and from the looks of the figures given and the overall design and feel of the product, things look good so far.
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