I had ifi go blu for one week now and I have put it through its pace. Overall I am happy with the device as it meets the purpose I got it for .. small portable with great sound .. and it delivers on all of it..
BUT… here are some findings or quirks
- Hiss.. I have seen the quantity of hiss you hear is based on codec you select. Also when you turn on device it hisses for 3 secs and goes dead silent. Then play something on phone and in some quiet portions you can notice the slight hiss . Again it is there if you look for it . In non critical listening or when outside I doubt anyone would discern. I am bit spoilt so it wanted it to be dead silent
- Battery life.. I had to charge the device 3 times total in a week based on my regular listening mode. What codec you choose has drastic impact on battery life. With LDAC I get about 5.5 hrs , with Aptx I get 7 hrs. Also xbass and xspace chew through the battery life.But it needs few cycles to stabilize battery . I have seen the same issue wit UE fits tws which had horrendous battery life first few weeks now I get constant 5 hrs with it
- Connection range - again this is codec dependent.. with LDAC and AptxHd I get shortest coverage maybe. 10 to 15 feet with Aptx it gives me more than 30 ft same as my other tws iems. Looks like non metal body is not doing much with improving range. My Sony WM1z which metal body and Bluetooth 4.1 has better range than ifi go blu
- Connection stability.. I had one issue with LDAC connection. When I moved outside it’s range it just dropped the connection and I had to manually restart on my phone. My other tws iems stutter but reconnect when back in range. This didn’t atleast for LDAC
- Playback controls.. when I lost connection and restarted back on phone. Some playback controls like play pause didn’t work. I had to forget the device in Bluetooth and reconnect for all things to work. This could be android issue or poweramp player issue as well
- LED colors. .. the color for xbass on and xbass +xspace on looks same to me .. it is nether yellow or white. Not a issue I just cycle but a quirk nonetheless
- Android quirk., with LDAC it always chooses “best effort” which is in between 330 kbps and 900 kbps. At this quality it sounds worse than SBC. Also when you change the sampling to 16/44 and best quality (990 kbps) for LDAC in developer options it resets back to default every time you connect blu to the phone.. the default settings for LDAC is 32/96 best effort. So I decided to keep it on Aptx HD . I could barely tell the difference between LDAC 990 kbps vs Aptx HD.. but I wish I could use the full LDAC bandwidth always on my phone
Even though I am bit annoyed by the presence of slight hiss with K10s it is really non issue during playback especially during non critical listening session. However the sound signature of this player makes for all these small issues. It is simply musical and organic and puts a smile on my face. Detail retrieval is very good and I like tonal accuracy. Hence keeping it. I was considering up5 but I find ESS Sabre sound bit fatiguing.