I have been looking for feature rich but well tuned and measuring TWS set for a while. So finally with the Earfun AirPro 4 I thought this was a good enough TWS to deserve a thread on ASR. I previously bought the Earfun Wave Pro headphones and I really liked what this company were trying to do with that Headphone, i.e. use Audio Science to tune their default sound signature as close to Harman and as you will see this trend has continued with the Air Pro 4.
I bought this TWS from Amazon.co.uk but I believe it roughly $70 with typical discounts on the US amazon also.
I won't get into the 'features', but this is an extremely (for the price) feature rich TWS, with mostly everything you could want from sub $100 TWS, wireless charging, AptX Loseless, LDAC Multi-point connections, Auracast (which probably deserves its own post on ASR) and lots of other things but lets get onto the measurements
Earfun AirPro 4 Measurements
Note: All these measurements were taken with my 711 'clone' coupler and are available on my 'blog' here .
Lets start with the frequency response for the default out of the box profile:
As you can see this very closely matches Harman especially in the bass and midrange, the treble could do with a little tweaking which I ultimately did with the built in EQ though any treble EQ beyond 8K will be very subjective IMO.
The channel balance isn't too bad:
The distortion is pretty good considering this is capture at 95db:
As a percentage:
The Group Delay looks ok also:
But since there are lots of sound options to measure, I thought it might be useful for people if I present the various sound profiles.
So first here are the 'simpler' profiles i.e. Bass boost 1 etc compared to 'Harman' in black:
But there are lots of other presents like 'Rock' or 'Classical' which I also measured - though one criticism I would have is these are not different enough:
Here are the most distinct ones on my DB but they are really just subtle variations on Harman:
So as well as the 'profiles' there is also a 10 band EQ which I thought might be useful to measure for its max and min values:
One thing I did find was each band of EQ was much wider than I would have hoped so a change to one does affect neighbouring band significantly, for example the minimal value for 125Hz does pull down a significant range:
So I did decide to use the built-in EQ to see how I would 'fix' the 1.5K to 3K boosted midrange (which subjectively I actually quiet like) but here is what I did I also boosted the treble region to move it close to the harman curve:
For those interested this was this setting inside the Earfun 'Companion' Mobile app:
While obviously you can EQ these separately in your own playback / EQ app, as someone who uses many computers and many headphones, IEM and TWS, if I can EQ the actual device it is as a huge benefit to me, so this TWS starting so close to Harman and then only needing some minor tweaks is great especially at the price, but I would love these manufacturers to starting including PEQ filters similar to what we are starting to see from some usb-c cables and dongles.
Anyway some final measurements, since this is a TWS I thought it would be relevant to measure any audible differences between the various ANC and Transparency/Ambient modes.
Note: I was measuring these in a quiet room so obviously there isn't going to be a dramatic difference.
First the ambient modes which only have a minor difference:
And the App offers 5 different ANC modes:
Not sure why the 'Balanced' ANC mode has a sub-bass roll off but I did measure this a few times and each time it had this response. Mostly the ANC seems to introduce a slight lower midrange 'bump'.
So, I won't get into subjective opinions other than immediately listening to these (before I measured them) they sounded correct and better than I expected and since I ended up destroying my AirPods Pro in a washing machine these will be my daily driver TWS, though the noise suppression with the microphone isn't as good as the flagship models I have tried.
I bought this TWS from Amazon.co.uk but I believe it roughly $70 with typical discounts on the US amazon also.
I won't get into the 'features', but this is an extremely (for the price) feature rich TWS, with mostly everything you could want from sub $100 TWS, wireless charging, AptX Loseless, LDAC Multi-point connections, Auracast (which probably deserves its own post on ASR) and lots of other things but lets get onto the measurements
Earfun AirPro 4 Measurements
Note: All these measurements were taken with my 711 'clone' coupler and are available on my 'blog' here .
Lets start with the frequency response for the default out of the box profile:
As you can see this very closely matches Harman especially in the bass and midrange, the treble could do with a little tweaking which I ultimately did with the built in EQ though any treble EQ beyond 8K will be very subjective IMO.
The channel balance isn't too bad:
The distortion is pretty good considering this is capture at 95db:
As a percentage:
The Group Delay looks ok also:
But since there are lots of sound options to measure, I thought it might be useful for people if I present the various sound profiles.
So first here are the 'simpler' profiles i.e. Bass boost 1 etc compared to 'Harman' in black:
But there are lots of other presents like 'Rock' or 'Classical' which I also measured - though one criticism I would have is these are not different enough:
Here are the most distinct ones on my DB but they are really just subtle variations on Harman:
So as well as the 'profiles' there is also a 10 band EQ which I thought might be useful to measure for its max and min values:
One thing I did find was each band of EQ was much wider than I would have hoped so a change to one does affect neighbouring band significantly, for example the minimal value for 125Hz does pull down a significant range:
So I did decide to use the built-in EQ to see how I would 'fix' the 1.5K to 3K boosted midrange (which subjectively I actually quiet like) but here is what I did I also boosted the treble region to move it close to the harman curve:
For those interested this was this setting inside the Earfun 'Companion' Mobile app:
While obviously you can EQ these separately in your own playback / EQ app, as someone who uses many computers and many headphones, IEM and TWS, if I can EQ the actual device it is as a huge benefit to me, so this TWS starting so close to Harman and then only needing some minor tweaks is great especially at the price, but I would love these manufacturers to starting including PEQ filters similar to what we are starting to see from some usb-c cables and dongles.
Anyway some final measurements, since this is a TWS I thought it would be relevant to measure any audible differences between the various ANC and Transparency/Ambient modes.
Note: I was measuring these in a quiet room so obviously there isn't going to be a dramatic difference.
First the ambient modes which only have a minor difference:
And the App offers 5 different ANC modes:
Not sure why the 'Balanced' ANC mode has a sub-bass roll off but I did measure this a few times and each time it had this response. Mostly the ANC seems to introduce a slight lower midrange 'bump'.
So, I won't get into subjective opinions other than immediately listening to these (before I measured them) they sounded correct and better than I expected and since I ended up destroying my AirPods Pro in a washing machine these will be my daily driver TWS, though the noise suppression with the microphone isn't as good as the flagship models I have tried.
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