Ok, maybe I should be more explicit then.
In your arguments you always assume that the amplifier puts out a nice "clean" power waveform (no 2AB present in it). You then reason that the power in the speakers must be the difference between that nice clean power shape and the weirdness of the power lost in the wires. At the same time however, the thought experiment also makes sure that the currents through the speakers remain the same. I am referring to the thought experiment in my first post here (let's not complicate things by attaching both cases to the amplifier at the same time). In both cases A flows through the tweeter and B flows through the woofer.
Now, don't you see that this is a contradiction? The power in the speakers can only change if the currents through them changed. Yet the thought experiment was arranged such that those where kept constant!
Ah, you have not read the entire thread, eh? No wonder.
Post 141 details the actual difference. It uses a voltage source which is common to both. Commonality of drive is important to display the differences between the wire dissipations.
Post 94 shows the difference in wire dissipation between mono and bi.
Post 119 shows the simple wiring difference, for those who don't know what biwiring is..
Unfortunately, I can't find the test schematic for finding the difference at the tweeters. (for this test, use tight tolerance resistors with zero b-dot intercept error..after all, it is low impedance..) If you wish, I'll look for it. Perhaps it was on AVS forum..
Essentially, a pair of IA's, one on each tweeter of the circuit in post 141, with a difference summation of the IA's. Sweep a sine through the entire bandwidth, to assure a null (that's the most difficult part given tolerances and mag pickup with low impedance circs..
note: Test the caps and inductors across the full band..while the inductors I purchased are really consistent in regard to build density, winding diameter etc (down to about .005 inch deviations), inductance across the band consistent to .5%, the caps are a bit more difficult to match exactly. The resistors are not normal either, mine are 250 picohenries, 4 ohms, but most important, no external flux to contaminate the measurements. I posted those somewhere, they were fun to build..
Once null is assured, put in a 10K sine. Verify null. Then toss in 20 hz.
If null breaks, there are several choices.
1. Look for circuit errors.
2. Look for stray coupling.
3. Check the IA's for CMRR.
4. Rethink your first year EE...???
Remember, an EE degree is not designed to get one to think..it is there to prevent anarchy within our discipline. Thinking, that one has to have independently..
I believe this debate, while fairly civil, is almost pointless. I don't speak for everyone here, but I don't think most of have any clue what you are talking about.
Yes, it is civil, isn't it. What I like the best so far, was the "dark Helmut" quip..
You don't need to understand what is being talked about. Many threads here I fall into that boat..
Well, I certainly apologize for any pollution of the forum I might have caused by inadvertently re-opening this thread. I admit I didn't check the dates when I posted my original message.
Never a problem..how did you find it, though..buried so far into the archives..
I didn't want to imply everyone should understand all of it. My native language is not English and sometimes what I'm trying to say comes out the wrong way
I got news for you. I do not care what language is your native one, you have clearly stated everything you have posted so well that I would never have suspected english was not your primary. Very well done.
Cheers, John
