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Manufacturers / Beyerdynamic

Beyerdynamic DT 990 600 ohm (report for a newbie)

General results Beyerdynamic DT 990 600 ohm

  • Sensitivity by voltage: 97.56 dB/V SPL
  • Sensitivity by power: 95.43 dB/mW SPL
  • Impedance: 612.02 Ohm
  • The type of acoustic design Open
  • Headphone: Mid-impedance
  • Type of headphones: Full size


This is a simplified report for non-professional users ("dummies"), poorly versed in the headphones characteristics and specialized graphs.

Information in this report presents in most simple and clear as possible. Interpretation of the data is simplified as much as possible and accordingly devoid of subtleties and nuances. This is sufficient for an overall assessment, but for a more complete and accurate presentation, the professional report should be studied.

By possible, the characteristics are accompanied by explanations to do reader possibility gradually master a more complex professional report.


For example when choosing a video card, many people do not understand the set of tables with the final data of the test packages. How to understand the relative difference in these figures? In most cases, the unprepared reader is satisfied with only the textual evaluation of the author, without delving into the figures. When the choice of a product is done thoroughly, then the reader gradually deepens into complex tables, mastering information from simple to complex. We made two separate reports: "simple" and "complex". A simple report with explanatory comments will allow you to self-study to gradually understand and professional report.

Analysis with recommendations for the Beyerdynamic DT 990 600 ohm headphones based on the measured characteristics

Analysis and recommendations for Beyerdynamic DT 990 600 ohm based on the measured characteristics
Sources
(what the headphones to be connected)
Areas of using headphones Sensitivity Impedance The type of acoustic design Total
97.56 dB/V SPL 612.02 Ohm Open  
Low-power sources -6dBV/15dB(mA):

a smartphone
a player
a tablet
Examples
Home or studio, where sound from the headphones does not bother anyone 2
★★☆☆☆
5
★★★★★
5
★★★★★
4.0
★★★★☆
Office and home, where people should not hear the sound from the headphones 2
★★☆☆☆
5
★★★★★
1
★☆☆☆☆
2.7
★★☆☆☆
Street with active traffic 1
★☆☆☆☆
4
★★★★☆
5
★★★★★
3.3
★★★☆☆
Metro (subway), pablic transport 1
★☆☆☆☆
3
★★★☆☆
1
★☆☆☆☆
1.7
★☆☆☆☆
Mid-power sources 6dBV/27dB(mA):
a computer with sound card
a Hi-Fi player
a portable amplifier
a mixing console
Examples
Home or studio, where sound from the headphones does not bother anyone 4
★★★★☆
5
★★★★★
5
★★★★★
4.7
★★★★☆
Metro (subway), pablic transport 2
★★☆☆☆
5
★★★★★
1
★☆☆☆☆
2.7
★★☆☆☆
Recording a voice or instrument in the studio 3
★★★☆☆
5
★★★★★
1
★☆☆☆☆
3.0
★★★☆☆
Hi-power sources 18dBV:

a home system with a headphone amplifier
Examples
Home or studio, where sound from the headphones does not bother anyone 5
★★★★★
5
★★★★★
5
★★★★★
5.0
★★★★★
Office and home, where people should not hear the sound from the headphones 5
★★★★★
5
★★★★★
1
★☆☆☆☆
3.7
★★★☆☆


The table shows the most common variations of sound sources and the scope of use of AMPs and headphones bundles.

The compatibility rating is similar to car analysis based on its ground clearance - on which road the car will move optimal without evaluating the class of the car.

Detailed description formula of the table of headphones

Features and recommendations for Beyerdynamic DT 990 600 ohm


Analysis of acoustic design Beyerdynamic DT 990 600 ohm


The Beyerdynamic DT 990 600 ohm headphones are made with an acoustic design of an open type.

Due to the open type, the headphones do not have noise isolation - the surrounding people hear the music from the headphones well, and the listener can hear ambient sounds.

Headphones without noise isolation are well suited for home and studio in a quiet environment, as well as on the street with active traffic, allowing you to notice the danger in time.

Headphones without noise isolation are unsuitable for use in noisy public transport - due to external noise it is necessary to increase the volume level of reproduced music, which is harmful for hearing during long listening. Loud sound is unpleasant to passengers nearby. In a studio, while recording vocals or instruments by a microphone, the open headphones are likewise not suitable, because sound from the "minus" from the headphones will fall into the microphone.

Analysis of the sensitivity of Beyerdynamic DT 990 600 ohm headphones


The sensitivity of the Beyerdynamic DT 990 600 ohm headphones is 97.56 dB/V SPL by the voltage and 95.43 dB/mW SPL by the power. The sensitivity by voltage reflects the relative "loudness" of the headphones among others - the higher the value, so the headphones are louder. The sensitivity by power reflects the efficiency of the headphones. High sensitivity of the headphones means less energy need from the source (for portable devices - less battery power).

Depending on the sensitivity, headphones are best to use with sources of optimum power. If the source is too powerful, then there is a high probability of constantly hearing background noise. If source power is weak, there will be insufficient volume level.

In a quiet environment for the Beyerdynamic DT 990 600 ohm , an amplifier with a voltage level of at least 12.44 dBV at 612 Ohms is recommended for listening to music with a level of 90 dB SPL (without noise isolation). An amplifier with a level above 50.44 dBV is not desirable if the volume control is digital, not analog.

For noisy environments, an amplifier with a voltage level of at least 24.44 dBV at a load of 612.02 ohms is desirable.


If you want to listen to music at a different volume level, you just need to add or subtract a change in dB to 90 dB SPL (for example, for a desired level of 105 dB SPL, add 15 dB and the minimum voltage level for the amplifier is 12.44 dBV + 15 dB = 27.44 dBV).


Analysis of the impedance of Beyerdynamic DT 990 600 ohm headphones


The average resistance at the headphones Beyerdynamic DT 990 600 ohm is 612.02 Ohm.

The resistance affects the amount of current that the amplifier should give to the headphones. If the current is not enough, the sound quality will deteriorate, beginning with harsh in the sound and ending with a banal rattling. In most cases, at low current values, the amplifiers operate in comparable quality to class A, and as the current level rises, the quality decreases toward AB, B, and the clipping zone.

Imagine that you have a water tank, which gradually becomes filled with water. The voltage at the amplifier, this pressure, with which the pump pumped water from the reservoir. If the inflow of water in the tank is lower than the volume that the pump pumps out, then at the pump outlet we collect water and "bubbles". Similarly, with the sound from the headphones, which lacked current from the amplifier.

For a quiet environment, an amplifier with an output current level of at least 6.84 mA in a given class of quality is desirable (preferably orientated to comparable class A) and 27.23 mA for loud.



If in your situation, the Beyerdynamic DT 990 600 ohm headphones in the table do not have a high rating, you can choose more suitable headphone models in a special on-line selection for the selected parameters. If fully suited, then similarly you can see what other models may suit you.


For different purposes it is best to select individual headphones, and not to look for some universal headphones for all occasions. Unfortunately, some properties of headphones mutually exclude the use of headphones in different situations. True connoisseurs of quality sound use several pairs of headphones. Headphones are compact and do not take up much space, unlike speakers.


Analysis of other measured characteristics for the Beyerdynamic DT 990 600 ohm

We prepare automatic analysis with comments of other characteristics and graphs, such as:
  • Frequency response
  • A recommended volume level for listening the headphones (by curves of equal loudness ISO 226-2009)
  • Changing the frequency response of headphones from connecting to standard sources
Follow our news.


On-line comparison and selection services for Beyerdynamic DT 990 600 ohm

Comparison the frequency response the.
The Beyerdynamic DT 990 600 ohm was tested for a long time at the stands of the last generation and does not participate in comparison. If possible, we will re-test the Beyerdynamic DT 990 600 ohm on modern stands.
Compare the frequency response of a bundle of headphones and amplifiers.
The Beyerdynamic DT 990 600 ohm was tested for a long time at the stands of the last generation and does not participate in comparison. If possible, we will re-test the Beyerdynamic DT 990 600 ohm on modern stands.

Compare the sensitivity and impedance the Beyerdynamic DT 990 600 ohm versus other models.

The automatic selection of the optimal AMP models from Beyerdynamic DT 990 600 ohm from the measured power parameters of the amplifying part and the measured parameters of the headphones for different purpose of use.




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