I am well aware that the brain is a major consumer of energy. That, IMO, says nothing about whether the brain is “efficient” in its use of energy much less how its evolution may have led to “efficient” functionality.
I also believe that efficiency has nothing to do with why we perceive differences when the objective data tells us otherwise (and to avoid the audiophoolery debate I go to vision): why do we “see” a face on the moon even though the facts tell us it is a random geological formation? Or why do we see animals, faces, etc in clouds or on a blank painted wall? To do so eats up energy “creating” a perception that is not there?
My answer, which some scientists espouse and I am simply agreeing with their conjectures, that the human brain is evolved to find patterns and differences because that was a positive survival skill. To find a difference in an otherwise featureless” plain or grassland can help one find their way and not get lost, or to find the stalking predator, among other perceptual uses. However, the perceptual system is also prone to lots of false positives, finding patterns and differences where none exist. If one believes this, then it seems that the positive value conferred is offset by the false positives. But it does leave us with a lot of false positives. I think this explanation for visual perception also applies to audio perception. Lots of false positives for differences in audio where none exist, because the value of hearing a slight change in the sonic environment is useful when being stalked by a predator, or when hunting for food; not to mention conducting violence against other competing human tribes.
I also believe that efficiency has nothing to do with why we perceive differences when the objective data tells us otherwise (and to avoid the audiophoolery debate I go to vision): why do we “see” a face on the moon even though the facts tell us it is a random geological formation? Or why do we see animals, faces, etc in clouds or on a blank painted wall? To do so eats up energy “creating” a perception that is not there?
My answer, which some scientists espouse and I am simply agreeing with their conjectures, that the human brain is evolved to find patterns and differences because that was a positive survival skill. To find a difference in an otherwise featureless” plain or grassland can help one find their way and not get lost, or to find the stalking predator, among other perceptual uses. However, the perceptual system is also prone to lots of false positives, finding patterns and differences where none exist. If one believes this, then it seems that the positive value conferred is offset by the false positives. But it does leave us with a lot of false positives. I think this explanation for visual perception also applies to audio perception. Lots of false positives for differences in audio where none exist, because the value of hearing a slight change in the sonic environment is useful when being stalked by a predator, or when hunting for food; not to mention conducting violence against other competing human tribes.
@Halauhula I am not disagreeing. Pareidolia (detecting pattern or meaning where there is none) is clearly an evolutionary adaptation that allows us to make quick decisions in situations where false negatives are way more dangerous than false positives. The "save energy by being intellectually lazy" comes in at the next level, when questioning (or not) the first reaction.
Intellectual laziness is IMO, learned and not built into our brains, nor does that have anything to do with efficiency. Taking thoughtless action without careful consideration often expends more total energy- brain and muscle, then a correct thoughtfully considered response.
Let that be a warning to all those who think there may be a difference when there is none.
Let that be a warning to all those who think there may be a difference when there is none.
Which explains why, after all these years, I still wait at the podium at Burger King in order to be seated.
Mini Dispante 3U/300mm ordered. Should be big enough for 4 channels & PS.
I'd see if Connex can make a ±30 V one. Or dial the ±32 V down as far as it'll go, at least if you plan to use 4 Ω speakers with the amp.
I've used a ±36 V version of the SMPS800RE in an amp I built for a client. It worked well.
You might want to check the cost of a corresponding pair of Mean Well RPS or LOP-series. They could be even lower cost and, frankly, Mean Well is a better product.
Tom
There's a personality trait called need for cognition, i.e., the need to think. Some have a higher need for this than others. It's correlated with intelligence, but it's a separate construct.
Then there's ignorance, which I bet is learned.
Both are different than the split second decisions our brains make on a continuous basis. Seriously. If you haven't already, and you're interested in this topic, read Kahneman. It's an insightful read. Matlin, Human Cognition, is another good cognitive psychology text. It covers cognition more broadly than Kahneman. Humans are fascinating.
Tom
Oh, yes. You can always stack the amp channels if you run out of floorspace. I prefer long threaded female-female standoffs for this. www.mcmaster.com is your friend in need (though not a very cheap friend).
TOm
Speakers are 6.something 0hm. Out of curiosity I’ll end up trying all kinds of power supplys.
I’m thinking I should get ISS.
Got a pic of one of those Ferrules. They must be petite to fit the rca screw point.
We’re pretty much all analog here.
Nice setup! The DAC3 is convenient since you can connect 2 analog sources (tape deck as in my case or vinyl) in addition to a digital streamer.
The small ferrules for the analog input were 22ga similar to this one: https://www.digikey.com/en/products/detail/phoenix-contact/3203053/859104.
It worked well with the Belden 9451 wire I used for the input.
Another convenient use was using the larger 2.5mm^2 type to connect a 14ga+22ga wire, 14ga going into the Mod86 and 22ga extending to the Guardian-86.
The small ferrules for the analog input were 22ga similar to this one: https://www.digikey.com/en/products/detail/phoenix-contact/3203053/859104.
It worked well with the Belden 9451 wire I used for the input.
Another convenient use was using the larger 2.5mm^2 type to connect a 14ga+22ga wire, 14ga going into the Mod86 and 22ga extending to the Guardian-86.
That is an amazing, pro-quality looking build, @itsikhefez! The bottom plate is a slick touch. VERY good photos. Well done!