Review on [2021 Updated] AIYIMA Tube T7 Audio 6N3 Tube Preamp Bluetooth 5.0 Warm Vacuum Buffer Preamplifier with Treble Bass Tone - Ideal for Enhancing Home Theater Systems by Brian Gopalan

I like this device very much. I have a 2.0 stereo with powerful floorstanding speakers in my garage when I'm working on my next mechanical project, and my receiver didn't have Bluetooth capability. I previously bought an Aiyama 6J1 preamp which sounded great but had a hard time playing quieter music and audio books. I contacted Sandy from customer service and was told that the improved Bluetooth capabilities in the T7 would fix the problem. I was very satisfied with the friendly customer service and the timely resolution of my problem. The new device works perfectly, has an excellent assembly design with good button sensitivity and excellent sound quality. I don't know why some people mentioned the Bluetooth range because this receiver picks up my phone at 60-70 feet away, even through walls. Excellent unit. Will buy more products in the future!