Review on 🔊 Enhance Audio Experience with Mini Stereo Line Level Booster Amplifier Preamp - 20dB Gain & Volume Control by Crystal Smith

Provides the gain and impedance matching needed to connect a line level preamp source to the 1V input of a studio power amp. The device does not add any noticeable noise or hum. to the signal. On the awkward side: - The volume control (actually the gain) has no detents or knobs, so it's difficult to adjust consistently. - You must provide your own power supply. However, it's simple: I charge my Apple iPhone charger with a handy ⅛ inch USB power connector. The device is small and light so it doesn't want to stay in place due to the weight of the cord or the tension. You can, I want to tie it. In my case, I used small self-adhesive rubber feet to keep the unit from sliding on the shelf it's on. What to do: Boost line-level signals without adding noticeable noise, hum, or distortion.