 One of the challenges we faced when designing the new department 10 valve pedal range was the internal power supply system. The original Blackstar HT valve pedals ran out of 22 volt 1.1 amp power supply. For these new department 10 pedals we really needed these to be 9 volt 500 milliamp power supply inputs. So they integrate into your pedal board. The difference between the original valve pedals and the new department 10 pedals is a difference in five times less power consumption. Achieving this massive power supply reduction means using the latest technology in highly efficient power supply conversion. This is alongside the addition of cabri, which uses the latest technology in low power consumption DSP. We needed this power consumption drop, but we didn't want to affect the sound of the pedal at all. And we needed the valve to still run at over 200 volts. Preamp valves can be run at much lower voltages, though the valve characteristics stabilize at around 180 volts. So hence we're running at this higher voltage. This highly efficient power conversion circuit that we use can be thought of much like a transformer. Converting a low voltage high current power supply to a high voltage low current power supply. And this is exactly what's needed to drive a preamp valve. Here's a test setup showing the conversion process. One voltmeter is attached to the power supply input to the pedal. Another voltmeter is showing the voltage generated via the boost conversion process. If I plug in the pedal you can see this process in real time. As you can see the input voltage is showing 9 volts DC. The output voltage is showing just over 200. Now as the valve heaters warm up you'll be able to hear the pedal come to life.