Review on 🔊 AIYIMA Tube T2 6J1 Tube Preamplifier: HiFi Bluetooth 5.0 Vacuum Tube Preamp by Sarah Moore

Pro Today I received AIYIMA Audio 6J1 tube preamp. I plugged it in and turned it on. The unit actually sounded good and the treble and bass controls worked flawlessly. The device made a very well-made and solid impression. The Bluetooth worked great. In terms of functionality and build quality, this device gets a 10 out of 10. Cons I don't really understand what this device does. I connected this device to my Yaqin MC-13. I connected the device to Aux 2 on my Yaqin. After doing this I cranked the phone volume all the way up and set 13s to 1/4 volume. I connected my bluetooth phone to Aiyima and adjusted the volume of Aiyima to 3/4. Everything sounded good. I then turned off Bluetooth and connected my phone via a lightning adapter to Aux 1 on my Yaqin at the same volume as before (iPhone all the way up and Yaqin at 1/4). Without Aiyima I didn't hear any difference. With or without Aiyima, my phone plays at the same volume through the amp. Summary From what I understand it should act as a preamp. The only feature I get is the ability to adjust the treble and bass, as well as the ability to connect my phone to my amp via Bluetooth via Aiyima. I don't see any amplification or amplification of the sound. Yes, I can turn the volume up and down on Aiyima and hear it working, but there is no difference between not using Aimiya and using the volume on my iPhone. All the same.