Quote:
Originally Posted by Bugsmasher
Cathar-
Where would you place the MCP600/AquaXtreme 50z in relation to the Eheim 1250 and D4 at 12v and 13.8v in terms of noise?
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MCP600 doesn't get all that much noisier even at 13.8v. My opinion is that the MCP600 sounds much like as if you had 4 or 5 Eheim 1250's running at once (but not vibrating against anything). When inside an enclosed case, the MCP600's noise (a rumbling drone) is generally tolerable if it's not rattling or vibrating anything, but not so if you are targetting super-quiet.
The D4's I personally find to be irritating. Somewhat louder than the MCP600's, but the buzzy square-wave whine is
really irritating. However, if you have a few 80mm case fans running at 2500-3000RPM, or 90mm fans running at 2000-2500RPM, then it's about here where you won't significantly notice the D4's noise over the fans if the D4 is inside the case. Also in lower restriction loops, as noted above, the D4's are less noisy.