Dunu Landmine (DN-23) - Test report a newbie-dummies Reference Audio Analyzer

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Dunu Landmine (DN-23) (report for a newbie)

General results Dunu Landmine (DN-23)

  • Sensitivity F.A.Q. by voltage: 132.04 dB/V SPL
  • Sensitivity F.A.Q. by power: 114.28 dB/mW SPL
  • Average impedance : 16.76 ohm
  • The type of acoustic design: Closed
  • Headphone: Low-impedance
  • Type of headphones: In-Ear or Tablet

Analysis with recommendations for Dunu Landmine (DN-23) headphones based on the measured characteristics

Analysis and recommendations for Dunu Landmine (DN-23) based on the measured characteristics
Sources
(to which the headphones will be connected)
Areas of using headphones Sensitivity Impedance The type of acoustic design Total
132.04 dB/V SPL 16.76 ohm Closed  
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 5
★★★★★
5
★★★★★
1
★☆☆☆☆
3.7
★★★☆☆
Office and home, where people should not hear the sound from the headphones 5
★★★★★
5
★★★★★
5
★★★★★
5.0
★★★★★
Street with active traffic 5
★★★★★
5
★★★★★
1
★☆☆☆☆
3.7
★★★☆☆
Metro (subway), public transport 5
★★★★★
5
★★★★★
5
★★★★★
5.0
★★★★★
Mid-power sources 6dBV/27dB(mA):
a computer with sound card
a Hi-Fi player
a portable amplifier
a mixer console
Examples
Home or studio, where sound from the headphones does not bother anyone 3
★★★☆☆
5
★★★★★
1
★☆☆☆☆
3.0
★★★☆☆
Metro (subway), public transport 5
★★★★★
5
★★★★★
5
★★★★★
5.0
★★★★★
Recording a voice or instrument in the studio 4
★★★★☆
5
★★★★★
5
★★★★★
4.7
★★★★☆
Hi-power sources 18dBV:

a home system with a headphone amplifier
Examples
Home or studio, where sound from the headphones does not bother anyone 1
★☆☆☆☆
5
★★★★★
1
★☆☆☆☆
2.3
★★☆☆☆
Office and home, where people should not hear the sound from the headphones 1
★☆☆☆☆
5
★★★★★
5
★★★★★
3.7
★★★☆☆


Analysis of acoustic design Dunu Landmine (DN-23)

The Dunu Landmine (DN-23) headphones are made with closed-type acoustic design.

Due to the closed type the headphones have passive noise isolation and for the surrounding public the headphones play much quiet than for the listener. External sounds for the listener is on the same quiet level.

Headphones with noise isolation are good for home, when you need not to disturb others while listening to music. It's good in a noisy office, allowing you not to be distracted. In noisy transport playing music in such headphones is more safe for hearing, because due to noise isolation it is possible to listen to music at an average or quiet volume. In the studio, when recording vocals or instruments on a microphone, the closed headphones fit best; Sound from the "minus" of the headphones will not get into the microphone.

Headphones with noise isolation are dangerous to use on the street with active traffic.

Analysis of the sensitivity of Dunu Landmine (DN-23) headphones


The sensitivity of the Dunu Landmine (DN-23) headphones is 132.04 dB/V SPL by the voltage and 114.28 dB/mW SPL by the power. The sensitivity by voltage reflects the relative "loudness" of the headphones among others - the higher is the value, the louder are the headphones. 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 power from the battery).

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 Dunu Landmine (DN-23), an amplifier with a voltage level of at least -28.04 dBV at 17 Ohms is recommended for listening to music with a level of 90 dB SPL (without noise isolation). An amplifier with a level above 9.96 dBV is not desirable if the volume control is digital, not analog.

For noisy environments, an amplifier with a voltage level of at least -16.04 dBV at a load of 16.76 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 -28.04 dBV + 15 dB = -13.04 dBV).


Analysis of the impedance of Dunu Landmine (DN-23) headphones

The average resistance at the headphones Dunu Landmine (DN-23) is 16.76 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 crackling. 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 fills with water. The voltage from the amplifier this is the pressure with which the pump draws 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 will be with the sound from the headphones, which are lacked the current from the amplifier.

For a quiet environment, an amplifier with an output current level of at least 2.36 mA in a given class of quality is desirable (preferably orientated to comparable class A) and 9.41 mA for loud.


Sensitivity

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The average value of sensitivity by voltage for In-Ear and Tablet headphones by measured 440 models is 128.8 dB/V SPL.

The Dunu Landmine (DN-23) sensitivity is 132.0 dB/V SPL.

These headphones are 3.2 dB louder than most In-Ear and Tablet headphones.This difference is insignificant and not exceeding a threefold deviation from the mean. So, most devices designed to work with In-Ear and Tablet headphones should fit quite well with the Dunu Landmine (DN-23). A sufficient volume should be provided during playback and background noise from the source should not be noticeable.

In general, to listen to music with a level of 90 dB SPL in a quiet environment, the amplifier will require a voltage of -22.0 dBV.

It is desirable that the amplifier provides a margin of 12 dB in cases of rare noisy environments or for too quiet recordings. Thus, the amplifier should provide a maximum voltage level not lower than -10.0 dBV.

Excessive volume margin is undesirable, since for analog regulator, the adjustment range is about 40 dB and below that the channels imbalance begins. For a discrete regulator the pitch may be too large. For digital controllers are possible options for adjusting the sound level before a DAC or in a DAC. As a result of that will be decrease the signal-to-noise ratio and accordingly it is probable the appearance of audible noise.

The average sensitivity to power for In-Ear and Tablet headphones is 112.2 dB/mW SPL (average by measured 440 headphone models). The Audeze LCD-2C sensitivity is 114.3 dB / mW SPL. Dunu Landmine (DN-23) have greater sensitivity than other headphones of this type. This means that their power consumption is lower and being connected to mobile devices, the operation time of this bundle will be longer than of many others.


On-line comparison and selection services for Dunu Landmine (DN-23)

Comparison the frequency response Dunu Landmine (DN-23) versus other models

Compare the sensitivity and impedance Dunu Landmine (DN-23) versus other models.

The automatic selection of the optimal AMP models from Dunu Landmine (DN-23) from the measured power parameters of the amplifying part and the measured parameters of the headphones for different purpose of use.

Сравнение АЧХ и звукового давления Dunu Landmine (DN-23) в зависимости от подаваемого напряжения и импеданса усилителя.
Close

Measurements of Dunu Landmine (DN-23) were carried out by Roman Kuznetsov on the hardware-software complex RAA.

The Dunu Landmine (DN-23) test was conducted as a black box test, without regard to cost and prestige. This is the basic principle for making measurements, measurement reports and developing tests in RAA.

I believe that it is important to do not make an absolute assessment of the device, but an aggregate assessment when working together with a source amplifier and taking into account external factors. This allows you to effectively reveal the potential of the entire set of devices or to make a more optimal choice of components.




Kuznetsov Roman
Founder of RAA



Known by the nickname romanrex
Аuthor of articles iXBT.com




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