D4 WITH jumper
 

I recently got my 3/4 barbed D4 from DD, and it HAS the jumper inserted in the back of the motor housing.
I wont have a chance to run it for a bit, and was just wondering if I may have received an old/loud D4.
I know that the muffled D4 (especially the swifty) wont have the jumper....
I had contacted DD and requested the D4 that is slightly less noisy than the original, but not less powerful.
In unfair words of another thread, the "second" revision. I AM making that revision thing up however !! (nikhsub, and BillA, you know what I am talking about with the rev thing)
Does anybody have experience with the 3/4 barb version of the D4?
Do I have the old loud version...I would rather not run it and exchange it if I do.

SenC.

With the jumper ON, the pump needs ~ 10V to start, with the jumper OFF, needs ~ 6v to start, that is the ONLY function of the jumper.

This seems odd to me. I have the Swiftech MCP650 here, with the jumper, and it starts at 5v with the jumper on.

This is exactly what Bill told me... Jumper on needs around 10v to start the pump up, with the jumper off it needs less, around 6v or so. :shrug:

*Edit* few, found the post so ya'll dont think im nuts.
http://www.ocforums.com/showpost.php...3&postcount=71

Yeah - I saw that a while back and specifically tried that out when I got the MCP650. The jumper didn't seem to make one iota of difference being on or not.

hmm, lost in Hungarian again ?
that info was from Laing, no reason to not believe it - until now ?
I'll investigate