Review on Nobsound 12AX7 12AU7 Vacuum Tube Preamp HiFi Preamplifier - Unleash Audiophile Excellence! by Jodi Ward

After trying several reasonably priced tube preamps in various configurations, I decided to try something better. The difference is so noticeable my kids have been asking me if I have new speakers or an amp. I switched the signal lamps to Phillips and Electroharmonix and after about 10 hours the sound was really good. I hooked it up to a mid-range Yamaha solid-state amp, as well as reference speakers and an Energy subwoofer. It's worth every penny so far. Expensive cables, DAC voltage regulators and nothing close to the improvements of this preamp. I'm getting rid of the power conditioner and silver compounds. Build quality could be better but a few hundred dollars more expensive. For me that's more than enough, I'm all about the sound and it's really good.