Quite a few people on various forums are concerned about the emulated out of our DSL20H and DSLCR amps. It seems that there is a set level for the emulated line out and headphones which can only be adjusted with either the guitar volume knob of gain channel knob. The channel volume does nothing to the line out/headphones only to the speaker output.

Is this normal behaviour? Where the gain knobs are the only controls on the amp that increases the loudness of headphone/line out. 

Will Marshall provide a way to increase the headphone volume as is very low against all other devices we use such as iPhones, PC DAWS etc, so makes it very difficult to practice without disturbing the household and neighbours...