how should i go about insulating my pump?
 

i recently purchased a d4 pump from voyeur mods about a week or so ago, and it seems to have a high pitch whine.

it's quite annoying, as my case is right next to me on my desk.

i read in another thread that voyeur gets their pumps directly from dangerden, but i suppose i was wrong, as this sounds like an older loud revision that everyone was complaining about.

i'd like to quiet this pump down somehow, perhaps by using some kind of insulation.

any suggestions?

Since anything you place on the pump will keep heat in, I would try this:
1) When I just purchased my DD pump it came with a 1/4" thick neoprene pad to mount the pump bottom to the case. I assume yours did too.
2) Line any inside surfaces of your PC case with Dynamat, or a similar, thin noise damping product.
3) The next more aggressive move would be to add some thick foam(Moony bought some from McMaster-Carr). Try one area at a time until you have the maximum amount that will fit without interfering with air flow.
4) I have been searching for a Rheostat for my pump to slow (and quiet it down) it down when i'm not gaming. The specs on the box the pump came in state 24 watts and 1.2 amps. So far the closest I have come is a FrozenCPU 15w rheostat they claim ran a 23w fan with no problem. Also I have seen a couple of drive bay fan controllers that can handle 18w per channel.
Good luck.

i suppose i'll try the dynamat.. but my case has a window. it may look ugly :(

Actually, the Dynamat looks trick if you apply it carefully. It is made up of a thin layer of sticky putty covered with a thick layer of aluminum foil with the Dynamat logo every few inches. When I applied mine I tried to center the logos. It wastes some but I think it looked better.

do you need to cover every surface entirely with the dynamat? (minus the window of course)

this stuff is quite pricey.. $30 for six strips

You're right, the price stinks! The more surfaces you cover, the more effective it will be.

Why buy Dynamat when you can get pretty much the same thing from McMaster-Carr priced at $20 for a 24x48 sheet? DLF of .21 vs the claimed .417 of the dynamat extreme. So use two layers. Half the price. McMaster-Carr item number: 9709T25.

Aaron Spink

Brown bread is another good sound deadener used in the auto sound arena. Much cheaper than dynamat. Roadkill is also resonably priced.

The foam I bought from Mcmaster-carr had a noise reduction coefficient of .8 and pretty much quieted down my MD-30RZ to a whisper. I'd really recommend it, accept it's not the easiest thing to make neat looking. I probably would use something thinner inside of a case...mines in an external box.

err..... those are brand names right??

Lead sheet.

Seriously.

Makes Dynamat seem like cellophane.

You can build one relatively easily that will drive any load you can find a transistor big enough for (you should be able to get 150W easily). You'll need to heatsink the transistor though.

Your idea sounds really intriguining. I would appreciate if you could give me some guidance on transistor selection, circuit layout, etc. Thank you.

Yes funny but true.
Roadkill is made by Stinger.
Not sure who puts out Brown Bread but a google search will find it.