Do I have the latest firmware? I wouldn’t know as the app doesn’t indicate if you do or not. HomeKit integration ought to be possible now that Apple have lifted the requirement for embedded chips. This speaker got major latency. Don’t buy it if you’re looking for a BT speaker to use with any mobile music making apps. The sounds the speaker makes to when turning it on/off and whatnot, NEEDS to be set to a default lower volume, user definable preferably. I used the aux in, and had to max out the onboard volume/amp as the device I had connected didn’t have enough juice to get any normal volume. When you max out the volume on this speaker it will blow your ears of with a LOUD sound letting you know that you’ve maxed out the volume. This is dangerous, it’s loud enough to permanently damage a persons hearing. You need to lock that issue down ASAP. It is a major issue when using the aux-in with a weak sound source. I would be dead by now if my mixer and DAW behaved like this. Sleep/standby after x amount of time with no sound regardless of power source. Have the speaker wake up when it receives a connection via Bluetooth (regardless if connected to a power outlet or not). My €90 BT soundbar does this, so ought to be possible on a €400 premium BT speaker.Finer volume increase from iOS devices if possible, it gets loud even at the lower 3-4 notches in iOS. Perhaps a bit of control over the bass/treble, adjustable via the app -> onboard speaker storage/setting, if possible. This would be handy for nighttime listening etc. This would be a bonus, not crucial in anyway.This speaker is €400+ (euro). That’s a, high, premium price point. It doesn’t matter how good/bad the actual speaker is when it’s riddled with issues like the internal blings and blongs sounds, no way to wake it up via Bluetooth, and so on.

After reading all of the reviews, most negative, I still gave the app a shot. Let me say for starters that I absolutely love my Onyx 4. It’s been amazing since the day that I purchased it. The app is unfortunately another story. I’m a “tech head” and can basically trouble shoot anything and get it to work. But the HK app definitely needs further development. After MULTIPLE strategies to get the app to work, I am still unsuccessful. I have reset the speaker, reset the Bluetooth, reset the phone, and numerous other techniques. The app still has not “found” my speaker and after multiple attempts nothing has worked even though I no issues playing music (which sounds amazing on my Onyx 4). I will always be an HK fan for the hardware, but the app is basically useless. Obviously, some people have gotten it to work and I applaud their accomplishments. But having “some” people find success and the rest get absolute failure is not a good ranking to say the least. I hope the developers address the issue and make this app work for all of their loyal HK owners.

Recently I purchased two HK Onyx Studio speakers to use in stereo mode. At first I tried just connecting them using the HK button on each speaker which works but apparently defaults to party mode. After installing this app I was able to easily switch to stereo mode. Sounds fantastic!!Don’t know if this matters but in my case I only paired one of the speakers to my iPhone. I then connected the other speaker by using the HK Connect button on each of the speakers. I have not tried pairing both speakers to the iPhone as this doesn’t seem necessary.

Worked the first time connecting to TWO Onyx 4’s, yet when paired watching movies there was a latency problem. Voices in videos were half a second behind what was being displayed in videos. Second time after a few days the app won’t recognize the speakers even when BOTH are connected to Bluetooth.. Keeps telling me to turn my Bluetooth on and won’t go past that page. However, I still can link both Onyx 4 speakers without the app, which is nice. I noticed with one speaker connected to Apple TV 4 there was no latency. I have yet to further test both speakers. But speakers are great. I’m believing these issues will be addressed with updates. That’s why I’m leaving a review hoping Harmon Kardon will fix these issues.