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In Reply to: RE: I'm Still Skeptical These Days Tom posted by thetubeguy1954 on June 28, 2007 at 09:40:54
Notice how many components today use toroidal transformers?
rw
Follow Ups:
E-Stat,
Yes I do notice the increase in toroidal transformers. But sadly I'm not very technically adept so please explain how their usage relates to the "magic brick" and how it effected/influneced sound.
Thanks, Thetubeguy1954
is to absorb the stray EMF generated by traditional laminated transformers. Toroids generate less hum and about one-tenth the EMF, both ideal for use in audio.
Toroids render the bricks unnecessary.
rw
generate a doughnut shaped field. Placing a flat piece of ferrous metal over and centered on a toroidal transformer will actually screw up the normal field, channeling the field form the egdes towards the middle and having them in direct oppostition to each other. You need a hole in the middle to allow the field to drop through, or alternatiely you could use two bricks on either side of the cneter.
I actually use large toroids (unmagnetised speaker magnet material) to very good effect over toroidal fields. Since the fields decrease in strength with distance, placement closer to the source is always of greater benefit.
Try placing toroids over, or under, motor assemblies: your TT motor, or your CD/DVD player spin motors. The sonic improvement can be quite dramatic.
For toroidal transformers, again remove the center bolt holding down tha transformer and replace it with a nylon equivalent. You will hear a more relaxed presentation, and a quickness to the music, with a larger soundstage.
I remember playing a very power hungry speaker with a large amp, and then opening up the crossover to examine the parts. I nearly burned my finger when I touched the bolt holding the air core inductor to the wooden case. The field dropping through the center of the coil was inducing current flow and with no where to go simply generated a lot of heat.
Early on, I purchased some Mu metal and did some experimentation with it. You can actually increase the size of the field by extending the mu metal way over the edges of the magnetic source. That's not necessarily a good thing. Placement and application is quite critical for best results.
Stu
E-Stat,
I've noticed a few different proposed suggestions as to how and why the "magic bricks" worked over the years. The 2 I remember the best are:
1) The brick's weight deaded transformer, chassis and tube vibrations.
2) The bricks absorbed or influenced magentic fields around the transformers.
If #2 is the main reason the bricks worked then I'd agree toroids would render the bricks less effect and perhaps unnecessary. But #2 might not be the only thing the brick affected and it's possible they still might have some influence on toroid-based amps as well. I'd love to hear a brick on an amp that used toroids. We'd know in about 20mins if the brick helped or not!
Thetubeguy1954
s
Some is mere technical speculation - does that sound familiar here? :)
Some is based upon HP's experience. I've seen bricks in his systems since the first time I visited Seacliff in 1980. He's got about a dozen of them. I still have an old pic of that IRS-CJ Premier One-Denneson JC-80-Goldmund Studio/T3 system where he used three of them on the amp. More recently, he used six! of them on the flotilla of black boxes that comprise a double pair of ASR Emitter 2s which do not have toroids. On the other hand, he didn't use them with Edge Signature monoblocks and now doesn't use them on the Edge amp that drives his MC system. He's kinda fanatic about testing that kind of stuff.
rw
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