I have a Vox Stomplab for about 18 mos now, and I'm a little confused about the global out put settings on the pedal. Per the manual:
"This setting compensates the output from the guitar amp model so that it will be suitable for connection to the input jack of your guitar amp. A1: Use this setting if you’ve connected the StompLab to an amp with a distinctive mid-range character, such as a UK-made open-backed combo. A2: Use this setting if you’ve connected the StompLab to a cleansounding amp, such as a typical US-made open-backed combo. A3: Use this setting if you’ve connected the StompLab to a stack-type amp, such as a 4x12 closed-back cabinet. 13 Ln: Use this setting if you’ve connected the StompLab to a line input, to a headphones, to the power amp input of a guitar amp, or to a recorder"
However, in reality, I've found that settings A1, A2, and A3 seem to "color" the sound so much that it sounds way too boxy and muddy. The Ln output, on the other hand, is very clear, open and bright sounding, although a little harsh at times and maybe lacking a little warmth.
So from what I've seen, it's almost as the manual has it backwards. Setting A1, A2, and A3 add color to the sound to simulate different amps, and the Ln input sends out a very sterile signal and leaves it up to your amp (or the settings you use on the pedal) to add color to the sound.
I was just curious if anyone else had experienced this or had any alternative perspectives on how these settings are supposed to be used. Of course, I'll do whatever sounds best for my setup, but I feel like I missing something if I'm doing the opposite of what the user manual says...
edit - I'll add that I'm using a Bugera V5 with an EH820 speaker.