EVH could tell the difference in materials I recall reading something about his cabinets, the braces or something said it didn't sound right
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Eddie demanded that the 5150 be made of Baltic birch and Hartley was glad to oblige.
When the development team delivered the test model to Eddie he took it apart. Because that's apparently what he did with everything.
So he takes the test cabinet apart and says, "Hartley, I thought we agreed this cab was going to be made of Baltic birch? What's with these little blocks of plywood down here?" Now, he's talking about some block inside the joints of the sides that was just there to give more space to join them or glue them or whatever. Hartley says, "well we decided that would raise the price by ___ dollars and it wasn't worth it because those little pieces aren't going to change the tone at all."
Eddie's not having it. He says it will change the tone and they get into an argument about it.
"Alright Eddie, tell you what. I'm so convinced that not even you can tell the difference of the woods on those little blocks, let's do a listening test. I'm going to build sixteen of these things, and in one of them I'll use your Baltic birch on those little blocks. If you can play through them and tell me which one it is then we'll go with it."
The cabinets are built and Eddie comes back down to the factory, plugs in and let's just one blistering high sustain note rip and vibrate everything until it dies out. Then he unplugs and goes to the next one, all down the line like that until he gets to one and let's the note rip... "That one."
Of course he's right, or there wouldn't be a story.