#testing people

I was reading some old school hearing people audio reviews. They have terms to describe what they hear. "This Amp has more SLAM than the reference Dinosaur 800!" or "The treble in the fish-fire 10 is very fine grained." What if anything does this mean?

Experience has shown me that things sound different. The differences can be described. Maybe they can be measured. Maybe they are measured, but what does 7th harmonic distortion 95db down sound like?

I have fiddled with things over the years. I recall pulling the cover off an old OP AMP preamp and putting a bigger capacitor in the power supply. It probably would have made zero difference to the measurements at all. It did make it sound different. The Bass was much better. Why, it was because there was a bit more power available for low frequencies which are the most demanding. The Bass was more impactful, it had slam! (in a preamp!)

My interpretation is that bigger power reserves help for big transient power demands which appear as something the word slam captures. How better to describe it. Testing people could open covers and wire the power rails and watch for voltage drops, but that is troublesome and a little bit dangerous. So we hear SLAM, and they see nothing on the scopes.

This is most apparent in power amplifiers as well they have the power.

My old Carver 200t amp does not have slam. Even though is advertises up to 120 Watts per side it sounds weak compared to a much older 60 Watt per side amplifier I have compared it to. The numbers show it is stronger, but it is weaker because of the strange and creative way the power supply is rigged. RMS constant sine wave power does not need slam.

The review I was reading was about an ARC amplifier like mine. They were praising it's slam as being almost as good as a big transistor amp. It has stupid large high voltage power capacitors you could start a car with. They also praised it's treble fine grain. What the hell is grain?

In a photograph grain is visible. In sound what is it like? Maybe it is like the noise fine sand makes as it is poured out of a container. Speaking about that same amplifier I know that high treble (at least what I can hear) is not perfect. There is a very fine and complex distortion up there that reads as a texture. Odd harmonics mixed in there being added to the signal so it is no longer 95db down.

I can tell you that the Nakamichi-san amplifier has comparatively seamless and clear treble. No grain at all. It is superior to the ARC Cl60 in that way. But sometimes superior is not better. I like the sound the ARC has.

There is no contest as to the ultimate SLAM. Nakamichi-san has the title in my house. It has dual mono power supplies, with BIG capacitors and lots of amperes available to push the woofers around. Spin up a copy of Saint-Sains Organ symphony and listen to that last bit. Slam. The last movement of Berlioz Symphony Fantastique demands slam. If you have heard either of those you know what slam is.

If you hear someone tell you about how someone is bad and thus should be cancelled, ask them "Oh really? What did they do?" Even if you do yourself know the cause of the scandal and/or the cancellation, play dumb. Do as if you never heard about it all.

Now usually the people will be able to give you some generality or will sum it up in one sentence or one term. But keep asking "Okay, but what did they do exactly?" [For example: "Oh, they said something awful on Twitter!" "Alright but what did they say?". "Oh it was something transphobic/fatphobic/racist/[insert any other stuff to get offended upon" "Okay, but what did they say exactly?"]

And by pushing a bit forward you will be able to split between the people who actually do know what they are getting offended by, and those who are just getting offended because everybody else is doing it - but don't actually know themselves what the whole fuss is about.

Do i know it is a terrible idea? of course i do.

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