Having previously used the 1/4" outs from my HD500 directly into my Rokit 5 monitors, I then changed to XLRs so I can take advantage of the ground lift. Because I'm still going direct to my monitors, I've had to turn the monitors and the HD500 master volume both right up if I want a bit of noise, to compensate for the XLRs being at mic level.

My intention is to add a mixer/interface some time soon, the preamp of which will solve the problem, but in the meantime I'm looking for a way to boost the output levels of my presets without changing the existing settings, as everything is nicely balanced with everything else. So, for example, I could change the mixer settings, or add an EQ or compressor or the vintage preamp (or a combination of these things) - something that I can drop in to any/all presets which can easily be removed later.

What's the best way to do this without causing clipping, etc? Or is there another (cheap, as it's a short term fix) solution?