Hello, Just purchased this Zoom B3 and it works nicer than my Roland Micro Cube Bass as a stereo preamp. My issue with most stereo setups is background noise, in this instance I have my SWR Baby Blue II head and Acoustic Control Model 126 Combo. The SWR has always introduced a hum into the output, not anymore. At least not as much, if any. The Zoom is a lot easier to setup than my old Roland GT-6B. I think that is what it was. The GT-6B was a bear for buzzing noise. My cabinets driven by the SWR are an older Kustom Tuck and Roll single 15 with Altec lansing speaker and a custom built 12 inch. The Model 126 uses its internal speaker only.