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Edit:wrote this before your next post. What I meant is full instantaneous (20khz BW) power, as in an impulse or the leading edge of a square wave, think percussion. You dont need a lot of power in the higher harmonics to get fast rise times, look at the freq. content of a square wave. The point...

If there below 20khz they are. Take a 100hz square wave and filter out the harmonics one at a time starting with the highest freq. It will progressively sound more and more like a sine as the rise time of the square takes more and more time.

What do you mean over the top signals? What I was getting at was, even with 20khz BW limited music with the usual power mostly in the bass you can still get full power 20khz signal rise times. If an amp slew rate limits theres probably IMD in the audio band. Fortunately slew rate has been a...

You an expert on current drive feedback? You sure make it sound easy. Have you ever designed a compressor/limiter? You have no idea what devils are in the details. Its still a compressor/limiter and will sound like one, why do you think it will sound better?

True but you can still get signals with full power, very fast rise times where slew limiting can occur. Look at the freq. spectrum of a square wave, very little power after the first few harmonics,

So you replace the built in power compression protection with a electronic compressor that requires temperature feedback from the coil? Dosnt sound basic to me.

The load is constantly changing as the voice coil temp. changes, Especially at high power.

You also get the disadvantages. https://www.sound-au.com/articles/current-drive.htm

And most amps also have caps in the feedback network to shunt RF away from the input pair to ground.

Thats the key. Delays limit feedback bandwidth. DSP always adds delay. At 10khz a 50us delay will cause instability. Im waiting for the measurements.

Are those raw drivers, no xover/eq? A LPF on a woofer can make a huge difference on attack time, and those graphs,

Actualy H(0)=infinity. Its the integral (area, or H(0)xH(t)) thats zero. So like a square wave its a physicaly impossible signal to create. So like all approximations you have to use it properly.

In this case the freq. response changes in a transformer circuit with source impedance and load capacitance can be obvious. You can even get high freq. ringing if you dont terminate with a proper RC damping network, and that R changes with source impedance and load capacitance. So you have to...

The contribution of the room when real drums are recorded is huge. Many rock/pop studios in the 70s, 80s became famous (among recording engineers) for the way drums recorded in there room.

Proper drum tunning involves pitch. https://www.keepdrumming.com/how-to-tune-drums/ And sometimes there even tuned to the key of the song. From: https://www.redpackdrums.com/post/tune-drums-to-song-key "Percussion instruments don't have a well-defined overtone series, so our brains don't...

For those who want to dig deeper, the audio transformer bible. Bill Witlock Including how to test transformers. Learned something new there, testing small transformers, like these, with a regular ohm meter for DC resistance can magnetize the core...

If you cant use a stud these are the best toggle bolts. The inserts go in before the bolt which simplifies there use, and you can take the bolt out and the insert stays in place so it can be reused. They hold 250lbs each in 1/2" drywall...

Yes, you put an amp (opamp circuit) after the transformer with the proper input impedance to load the transformer. But you still need to know the transformer input loading or add an input amp and it becomes an active device that needs a power supply. And as Siy has said this will probably...

Sure a countinuous response from zero. But the corner freq. depends more on the source output 20ohms than the coil resistance 1ohm. And loading the transformer will also change things. Also, transformers saturate with less current if theres not enough load. Like Siy says, using transformers in...

Your using a speaker to show transformer impedance? I dont see DC on that graph and 2 hertz is a million octaves higher. ;) The specs of a Jensen MC transformer for Ortofon cartridges with a 47k output load, input impedance at 1khz is 31.5 ohms, the DC input resistance is .3 ohms, 100 times...