Roland RH-A30 - Test report a newbie-dummies Reference Audio Analyzer

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Roland RH-A30 (report for a newbie)

General results Roland RH-A30

  • Sensitivity by voltage: 116.58 dB/V SPL
  • Sensitivity by power: 103.03 dB/mW SPL
  • Average impedance : 44.17 ohm
  • The type of acoustic design: Open
  • Headphone: Mid-impedance
  • Type of headphones: Over-ear

Analysis with recommendations for Roland RH-A30 headphones based on the measured characteristics

Analysis and recommendations for Roland RH-A30 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
116.58 dB/V SPL 44.17 ohm Open  
Low-power sources -18dBV/6dB(mA), S/N 105 dB:

a smartphone
a player
a tablet
Examples
Home or studio, where sound from the headphones does not bother anyone 3
★★★☆☆
5
★★★★★
5
★★★★★
4.3
★★★★☆
Office and home, where people should not hear the sound from the headphones 3
★★★☆☆
5
★★★★★
1
★☆☆☆☆
3.0
★★★☆☆
Street with active traffic 2
★★☆☆☆
4
★★★★☆
5
★★★★★
3.7
★★★☆☆
Metro (subway), public transport 1
★☆☆☆☆
3
★★★☆☆
1
★☆☆☆☆
1.7
★☆☆☆☆
Mid-power sources 6dBV/30dB(mA), S/N 120 dB:
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 5
★★★★★
5
★★★★★
5
★★★★★
5.0
★★★★★
Metro (subway), public transport 5
★★★★★
5
★★★★★
1
★☆☆☆☆
3.7
★★★☆☆
Recording a voice or instrument in the studio 5
★★★★★
5
★★★★★
1
★☆☆☆☆
3.7
★★★☆☆
Hi-power sources 18dBV, S/N 120 dB:

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
★★★☆☆




Analysis of acoustic design Roland RH-A30

The Roland RH-A30 headphones are made with an acoustic design of an open type.

Due to the open type, the headphones do not have noise isolation - the people around can hear well the music from the headphones, while you can hear ambient sounds too.

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, as 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 gets into the microphone.





Analysis of the sensitivity of Roland RH-A30 headphones


The sensitivity of the Roland RH-A30 headphones is 116.58 dB/V SPL by the voltage and 103.03 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 Roland RH-A30, an amplifier with a voltage level of at least -6.58 dBV at 44 Ohms is recommended for listening to music with a level of 90 dB SPL (without noise isolation). An amplifier with a level above 31.42 dBV is not desirable if the volume control is digital, not analog.

For noisy environments, an amplifier with a voltage level of at least 5.42 dBV at a load of 44.17 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 -6.58 dBV + 15 dB = 8.42 dBV).






Analysis of the impedance of Roland RH-A30 headphones

The average resistance at the headphones Roland RH-A30 is 44.17 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 10.62 mA in a given class of quality is desirable (preferably orientated to comparable class A) and 42.26 mA for loud.





On-line comparison and selection services for Roland RH-A30

Comparison of basic characteristics: Sensitivity, Impedance.

Determination of the required voltage level from a headphone amplifier for RH-A30 and comparison with other models A additional analytics of compatibility with specific amplifiers.

The automatic selection of the optimal AMP models from RH-A30.


Close

Measurements of Roland RH-A30 were carried out by Roman Kuznetsov on the hardware-software complex RAA.

The Roland RH-A30 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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