iFi uno DAC & Headphone Amplifier - USB-C Audio Interface with 32-bit/384kHz/DSD256/MQA Support - Customizable Sound Modes for Streaming, Gaming & Music - Compatible with Windows, Mac, Smart Devices & Active Speakers - Perfect for Home Studio, Office Work & Entertainment Setup

I need to be able to play music from my iPhone through my home audio system. My home receiver does support Bluetooth, but I was unhappy with the experience of connecting the phone this way. I found that I had to turn the volume on the receiver WAY up in order to hear the music at an acceptable volume. I also wasn't thrilled with the overall sound quality. I'm no audiophile - this is just music streaming from Spotify, not lossless FLAC files - but I felt like it should sound better than it did.Enter the iFi Uno. This has proven to be exactly what I needed. In my case, I had to pair it with the "Apple Lightning to USB 3 Camera Adapter", which you can find here on Amazon for about $38. With these two devices, I'm able to enjoy music from my phone through my home audio system at a high level of quality. Hook the lightening adapter to the phone. Hook the Uno to the USB-A port on the adapter. You're good to go. For bonus functionality, hook a lightening charging cable to the other port in the adapter, and your phone can also recharge while it's playing your music.With the Uno device, you are bypassing the iPhone's onboard DAC in favor of the dedicated one in the UNO. I can definitely hear the difference in quality. You also get the benefit of the Uno's pre-amp, which lets you boost the volume a bit, so that you don't have to go nuts with the home receiver's volume. I'm connecting to the home receiver with the Uno's RCA connections. I am using the Uno's "power matching" feature, which seems to add a slight increase in strength to the signal, but it's very subtle. This feature may be aimed more at headphone users, but that's not what I needed the device for. The onboard equalizer seems to work fine - I can hear the difference in the 3 pre-set sound profiles - but I don't use it. I prefer to use Spotify's equalizer to adjust the sound if necessary.So for about $120 for the two devices, I have a setup now which allows me to get the most out of my streaming music and my home audio system. For me, it's been well worth the cost. The only downside is that this is a wired connection. It lacks the convenience of Bluetooth, but the improvement in sound quality and volume has been well worth the slight inconvenience for me. I hope someone finds this helpful.