I did a review an Amazon. Figured I would include it here. I cannot be as critical as others because I haven’t listened to as many other devices to do a comparison.
I also did not think it was worth creating a new thread over, since this one already exists.
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I have used the BTR5 (ESS) for a couple of weeks. This was a lot smaller than I expected.
I enjoy the sound/tone of this DAC. I used with Steelseries Artics 3 Bluetooth and Focal Stellia. Artics did not have a much of change in sound that I notice. There was a significant change in volume. I was getting distortion at very high volumes. These are not audiophile headphones. They are a cheap(er) versitle gaming headset–PC, Playstation, Xbox, mobile, Switch) and has Bluetooth.
The Stellias there were some differences, but it was more subtle. It should be noted, they are not hard headphones to power and get to perform well. Technically speaking, they would be enjoyable with the BTR5. Using the SE 3.5mm, the volume difference was the biggest difference between the PC and Note 20 compared to running from those devices without. I would say a bit more articulation. Using 2.5mm balance, more clarity, articulation, and volume. I did not try either at max volume, but not distortion at very loud volumes. When using not connected to USB power source, not as articular and clear, but still sounded better than without the BTR5.
The EQ presets are nice to have. There is a custom one that can be created. I do not use these. I prefer my devices to run as close to reference as possible without having to use an EQ. I like bass, but I am not a bass by any stretch of the imagination.
It has good codecs. Having some of the new AptX codecs would be nice, but this is only useful if your source device supports it.
It has an app, where you can select which codecs to support, EQ settings, and a few other things. There are other portable amp/DACs whose apps are more feature-rich. This app fits the device well. This will also be where firmware updates will be done.
Having the device setup to high volume does drain the battery faster, as all devices do. I tend to prefer to control the volume from the source device out of convenience. Devices do not get too much more mobile than this. It is extremely small and can fit in most pockets with ease. The clip is nice bonus, but I do not use it. Obviously having in a tight pocket make it harder to use. I would not not put in a pocket with other stuff because of risk of scratching or other damage.
I believe this device will suit many people looking for a small and portable amp/DAC for drive their headphones. There are some headphones that this will not be ideal because it does not have the power drive them or the volume that some users will desire. It would be difficult to find a device as robust for the given price.