I have an RP401X2 with one PMP-400 (Laing DDC 3.25) atm. Unfortunately, the unit is not wired for PWM like Swiftech's MCP35X. How in the world do I quiet this pump? My basic fan controller is problematic because of the pump's startup voltage requirement - I don't want to have to change the speed on startup.
What is the simplest, least expensive way to get this pump running at a lower voltage?
What is the simplest, least expensive way to get this pump running at a lower voltage?