Weighing in at just 7.4 pounds, this sleek and minimalist bass head is small enough to slip into your backpack or gig bag. But don’t let its size fool you — inside this small steel box is a powerhouse of girthy low-end tone. The Darkglass Microtubes 900 bass head packs a 900-watt wallop. At its heart lies the tonal power of the clean, tight B3K preamp pedal, as well as the gritty, tube-like character of the Vintage Microtubes overdrive.