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RE: Test of Once-Removed Theory





MB: If you are going to test the two explanations put forward for why the "magic brick" improved the sound, and if one of the explanations was that the chunk of iron inside the "magic brick" absorbed the magnetic field created by the transformer in the equipment, then you have to also use a chunk of iron!!

TG1954: Of course you're 100% correct "IF" I wanted to make my DIY "magic brick" exactly like VPIs it would have to be iron. My goal is not to simply create an exact DIY copy of VPI's brick. Instead I'm hoping to discover why it worked and then possibly improve it's performance. I'm not very technically adept and I thought there might be other metals known to absorb ot affect magnetic fields even better than iron. If that was the case I'd want to use that metal instead of iron. The idea being that it "might" cause an even greater, better effect. I was hoping you might know which metal is best at absorbing or influencing magnetic fields.
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MB: You say that you don't want the metal to scratch your transformers. Why do you want to put the metal directly onto the transformers ? In the majority of cases, the "magic brick" was placed on top of the equipment's outer CASE !!

TG1954: Unfortunately my transformers are "exposed", yes they're covered by metal cylinder covers but I don't want the covers scratched either. I provided a picture of my amp from the front and side so you can see what I mean. So I'd have to place my DIY brick on top of these covers. Hence the need/desire for felt.
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MB: You are quite correct in wondering if an additional layer of felt would affect the sound. The answer is yes, as will a second layer of felt as will a third layer of felt !!!

TG1954: Ok that's what I'd thought you were going to say.
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MB: To begin to understand so much, you have to move away from "something affecting the audio signal" or "something affecting the acoustic air pressure waves in the room".

TG1954: I'm willing to try and understand that something else besides "affecting the audio signal" or "affecting the acoustic air pressure waves in the room" is happening. Can you begin to help me understand what you're suggesting is actually occuring instead?
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MB: Quite simply, instead of searching for a wooden case in which to place the chunk of iron, use a plain (unprinted) cardboard box !!!

TG1954: Great suggestion. I'll start with that.

Thetubeguy1954

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