DD12V-D4 – 12v Pump
The pump included with the DD kit is small and powerful and easy in use, no need to wire through to the mains as it will gladly take a 12v line from your PSU. This means less wiring and you can easily hook it up to a rheobus to regulate its speed.
The rheobus must be able to provide 18W per channel and to get the motor running it needs 6v according to its specs sheet, in practice it actually needs almost the full 12 to get started. We used a very simple yet effective rheobus from Sunbeam
which allows you to go from 0->12v in very small steps. The only downside of using this rheobus is the inability to start the pump when the voltage is set to less then 6v. The more expensive rheobus models like the Cooler Master Aerogate can overcome this issue since they provide 12v at start-up and then drop back to the preconfigured setting.
Noise wise this pump scores quite high when running at full voltage, dropping it to 7v makes it a lot more bearable and when screwed tight into your case the sound is like a silent humming. When looking at the specs of this pump compared to the Hydor L30 it seems this pump out performs it slightly when running at 12v, not bad at all!DD12V D4 vs Hydor L30
Future in-house testing will prove how much difference there is between this DD pump and other known ones from Eheim and Hydor.
The only minus point I found was the lack of a preinstalled power connector for the pump, since this pump can be plugged straight into your PSU’s 12V connector I found it strange that DD did not provide this out-of-the box.