Fuse Direction for Pass Labs Amp and Preamp

You never owned Bose 901s or have read why Amar Bose designed them that way, I'm guessing.

@russ69 This is such a great example of what I'm talking about (the myth bit)!

I'll put it to you this way: If someone comes up with a way to get home stereo electronics to favor a certain genre of music, they will be a millionaire overnight. There really isn't any way to do it (if you feel I'm incorrect about this, by all means, please get out there and show the rest of us your circuit or speaker design!!). What makes a speaker (or amp, cartridge, cable, etc.) good for one genre makes it good for another since we humans uses the same range of frequencies for music regardless of what the nature of the music.

Bose designed the 901 to mimic the concert hall, which might suggest to some that its better at classical music. It isn't. I regard it as a failure (insofar as accurate musical reproduction in the home is concerned; if meant to make money it seemed to be successful at that); at the very least there should have been more directly radiated information. The understanding of how the ear processes late delayed information was less understood back in the 1960s (if delayed about 10mS or more, the ear can use the rear-firing information for echo location, thus making the center fill more palpable; to do that the rear of the speaker needs to be at least 5 feet from the wall of the speaker behind it) when the speaker was designed.

Have fun! 🙃

Lets not forget the biggest myth of all East coast, West coast, sound. LOL 😎

Mike

I’m really surprised to read atmasphere say that a fuse can’t have a preferred direction. That is also telling me you don’t look at the wire and how it’s pushed through the dies before soldering them in a preferred direction. Is that right? You don't care which direction the wire is soldered in? I do! 

Second if a Rectifier tube can have such a great affect on a valve amp, what makes people think a fuse, power cable, wall outlet won’t. Not only is there a difference in the sound, there is a reason why. The properties of two different end caps and the way the thermal filament is constructed along with how it was pushed through the dies. AND there is no direction?

Oh YES there is.

It’s simple AC moves in a direction towards the source, period. When it gets there it produces heat if it’s used and it’s moving in that direction because it is being used. The chicken or the egg. Heat is the result of use.. It’s certainly not hot to the tough at the receptacle is it? NO it’s hot where it’s working or producing heat.

You build amps I build cables and equipment. We even have direction on our inline DC fuses.. AC on the outside, DC on the inside.. That’s what is preached by most mechanics.

No direction? WOW! I thought that was figured out 30 years ago, from the 1800 old tech teaching. Things change. I’m actually reading the EE 2020 addition updates, Nano arcing and the quantum effects, Chip mortality # 1 killer, nano arcing and how alloy treatment prevents it. No bare hands anymore. The acid in your hand causes issues in the solder. Hand acids can actually etch a bearing face and cause a failure.

Most of the kooky, loopy stuff audiophile have been saying for 30 years is published reading for Electrical Engineers NOW to keep up.

I rewired two sets of Cary MB. Great result. I’ve seen 30-35 amps redone in our little group. Brian Cheney from VMPS was one. James B, did the work before they both passed in 2012. Cool tea for me.. I'm off work..

BTW another mechanic loaned me the book, we're both into stereo equipment. He's almost 70. Western Electric nutter. AC/DC speakers.