|
Audio Asylum Thread Printer Get a view of an entire thread on one page |
For Sale Ads |
70.181.188.112
In Reply to: RE: The difference is labor posted by fmak on November 18, 2014 at 11:24:06
CNC’ed aluminum cases are better for shielding due to their thickness. Aluminum doesn’t do squat for low frequencies - you need steel or something magnetic. But, that adds electrical distortion. The Navy did a study on that decades ago - most of their vehicles are really large steel vessels and they find their way through various sonic tricks. Aluminum doesn't add nearly as much distortion, but if it’s thick enough the Eddy current losses do make for good shielding. Not to mention the better mechanical resonance issue.
There’s also the air flow aspect and how that effects thermal properties of components. A real advantage of CNC boxes is that you can have a heat sink connection anywhere you want. This isn't just an audio thing, either.
LUCY
Follow Ups:
sink connection anywhere you want - why? not true
Do you know that smeltering an Al billet and then shaving this off is one of the most polluting activities that can be undertaken in material processing?
what you say about thickness and shielding is not true either. If maximum EM shielding is needed, then the Al cavities need to be lined with Mu metal and the like.
Why does anyone want to pay over$25000 for a preamp in a 'value ehancing' box?
Some of the better sounding preamps are housed in Acrylic!
I would suggest that most of the expensive preamps are housed in "beautiful" cases. When you're dealing at this price level, pride of ownership enters into the picture-so I'm told by industry people.
Post a Followup:
FAQ |
Post a Message! |
Forgot Password? |
|
||||||||||||||
|
This post is made possible by the generous support of people like you and our sponsors: