Orange D-MD Micro Dark Valve Hybrid Guitar Head Amplifier. The Orange Micro Dark hybrid electric guitar amplifier head puts great high-gain tones in a simple and very portable package. Based around Orange's popular Dark series of amplifiers, the Micro Dark offers the same searing gain and tonal versatility as its big brothers, but boasts the same tiny format as the Micro Terror. This mighty mite crams 20 watts into a head about the size of a small lunchbox. If you need a simple-to-use, portable amplifier with huge tones, check out the Orange Micro Dark. The Dark series of amplifiers make no secret that they're engineered for high-gain heavy metal. But even with the few knobs on the front panel, you'll be able to quickly dial in a large variety of tones from metal grind to spanky cleans. And if the huge range of tones available aren't enough, the Micro Dark will work with most guitar speaker cabinets, allowing you to fine-tune your tone.