With the MP40 Vortech Ecotech Marine succeeded a great success a few years ago, but there were critics in the worldwide forums who complained about the volume of the driver unit. Especially at high speeds and in pulse mode, you could register a whirring sound.
Ecotech Marine released the Quietdrive model earlier this year. I also have the mp40QD version and have to say: It is really inaudible from a small distance so I would have no problem putting a tank with that pump into my bedroom. EcoTech says, that the volume reduction results from an optimized energization of the Dry-Side and offers a controller upgrade for older Vortech generations. You can’t get the huge performance upgrade, the mp40QD has, but with the controller upgrade it should be as quiet as the new generation!
I upgraded my older Vortech mp40w – here’s the result: Read more