SUT - electrical theory and practical experience

@holmz  : No problem, my mistake.

R.

Dear @antigrunge2  : " arrogant language without any knowledge basis for their argument. "

Please give us an examples of " arrogant language " from "  incredible how many people on A‘gon.

and if you can share with us from where or why you said " without any knowledge basis for their argument. "  Some examples could be fine.

Appreciated.

R.

holmz  : No problem, my mistake.

 

R

@rauliruegas 

When I left the TT a few weeks back, it was looking like this:

 

So it is on the table of the operating theatre and a new bearing is en route.

I was not able to find an anodiser to anodise the arm board, so I’ll put in, in the shiny raw alloy state.

@rauliruegas,

For the record and no pun intended, TI did not exclude wide bandwidth MM.  Their written statement was "This is generally not a problem with moving magnet cartridges, since they are usually severely band-limited above 20 kHz...".

Otherwise, your preamp spec with slew-rate 350 V/us and 1.5MHz bandwidth mathematically (using the equation to determine slew rate at frequency) is capable of a peak voltage (at 1.5MHz) of about 3.7V.  Any more than this and at 1.5MHz, the amp becomes unstable.

What does this mean in real-life?  Well, that's a good question.  There are obvious 'designers" such as Goldmund and Spectral WELCOME to Spectral Audio'sHome Page who adhere to very high 'speed' high slew-rate (Spectral is >1000 V/us with bandwidth 1.5 MHz) designs as the optimum.  While others do not.  

The 'bandwidth' (no pun intended) of audio design and followers of each is equally wide (no pun intended).  For one to stipulate that one is better than the other, IMHO is an exercise in futility given the wide variation in just individual sensitivity to sound which academia has indicated can be a factor of 10:1:  

Consider what is written page 16 – of Microsoft Word - P406POM_Lect5.doc (illinois.edu) UIUC Physics 406 Acoustical Physics of Music ©Professor Steven Errede, Department of Physics, University of Illinois at Urbana-Champaign, Illinois 2002 - 2017. The Human Ear ⎯ Hearing, Sound Intensity and Loudness Levels (78) "The time-averaged, or RMS sound intensity threshold of hearing (@ f = 1 KHz) is: ~ 2.5x10-12 RMS Watts/m2 = 2.5 RMS pico-Watts/m2. Individual people may hear better/worse than the average person, and so threshold of hearing from one person to another can vary as much as 1/10 or 10X this!!!".

Take care and best wishes for the holidays,

antinn, In your quoted paragraph, I think they are using "Watts" as an expression of acoustic power or energy.  On that assumption, and wanting to know how acoustic watts is defined, I found this on Wiki: "Sound power or acoustic power is the rate at which sound energy is emitted, reflected, transmitted or received, per unit time.^[1] It is defined^[2] as "through a surface, the product of the sound pressure, and the component of the particle velocity, at a point on the surface in the direction normal to the surface, integrated over that surface." The SI unit of sound power is the watt (W).^[1] It relates to the power of the sound force on a surface enclosing a sound source, in air. For a sound source, unlike sound pressure, sound power is neither room-dependent nor distance-dependent. Sound pressure is a property of the field at a point in space, while sound power is a property of a sound source, equal to the total power emitted by that source in all directions."  It's not an easy concept to grasp.