#Class D

[mskittycowthing]

The thief

[yotenotes]

yeah (all except last one are scp ocs)

second image is crazy lore heavy iykyk

[takmiblog]

YDA138 class D Power Amplifier

8Ωのスピーカを使っている人には、素直な周波数特性がデフォルトのままで得られるのでお勧めの基板なのだが、もう出回っていないようだ。もう一枚買っておこうかと思ったが後の祭りである。力強い低音が出るのも美点である。TA2020-020やTA2024はいいICだが、YDA138も相当いいICであるなあ。

[sixtyemeralds]

It appears my intellectual piracy has caught up with me. Now I'm an experimental subject!

[hippieuncle]

some old faces

[audio-luddite]

Dangerous.

I got my Tax statement and it is a refund. DO NOT SPEND IT!

But hey can it hurt to look around?

First I checked up on a couple of LPs I have been thinking about. I want a copy of Joan Baez "Diamonds and Rust". Back in Uni my audio buddy and I listened to that one a lot. It was his copy. I still remember the sound. I want one of my own to listen too with my current system.

On his old system ARC SP3a1 preamp, HK Citation 12 amp, Advent speakers (there was only one model). It was warm and rich and resonant. There was this one cut I remember an amazing piano sound with that LP.

The other LP is maybe perhaps a gourmet copy of Famous Blue Raincoat by Jennifer Warnes. I have two copies of consumer grade pressings. There are some old ones kicking about. IMPEX made one of those fancy box issues which costs three digits and even though I really like the record that is too much money.

I found a less fancy Impex issue, but it is sold out. Discogs has some but..... Damn what the market can bear is quite a lot sometimes.

OK lets just check out the CAM listings. No duty and usually no tax, but shipping can be a bitch for heavy stuff. I seem to like stuff that is heavy. Hey there are some interesting amplifiers.

This one caught my eye.

It is a Pioneer M 25. Dual mono check, that is good. It looks really cool to me. It is 150 Watts full tilt, but is high bias and runs Class A up to a few Watts. She is very handsome to me. It is not very unreasonable at just over $1k, but from a dealer that promises free shipping coast to coast from Ontario. (That is at least $100 bucks). It was a statement amp for Pioneer back in the day. Really tempting, mostly because of the look, dammit.

Oh it's harmless to keep looking right.

Just look for amplifiers under $1100 and there are hundreds. (No tube amps worth looking at that price for sure)

Oh, what is this?

These are Audio Research DS450s. 450 Watt per channel stereo. The owner used them mono into the second ugliest speakers I ever saw. He wants $4700 for the pair original cost $18k. So one for $2350? They are solid state. According to ARCDB they are quasi Class D? That is interesting from a technical perspective.

The ARCDB description notes the power supply is conventional linear with big transformers and Capacitors. I doubt those tiny class D amps can actually work as I do not see how small switching power supplies can put out enough amps. I mean the wires are tiny too. Normal speakers need amps more than volts to work right. But here the output circuit is high current switching. And ARC brags they make everything in house rather than buy "modules" from you know where. So efficient, and ampere heavy.

Too damn expensive for this human, but I am intrigued. Leave it to ARC to avoid the Switching Power supply and have a heavy and expensive iron hunk in the front. I think that is confirmation that of my suspicion there is a fundamental flaw in Class D tiny amps.

I find it amazing the price on much of this stuff. I mean it is just for a stereo after all.

I also find it amazing that reviewers spew so much ignorance about the stuff they criticize. Regarding the big ARC I read a man who praised all the other amps ARC made as "Class A". Obviously confusing the type of circuit with some "class" of quality. He also thought that the aluminum case was for shielding RFI from getting into the amp, but with 400khz switching frequency, it was probably shielded to keep stuff in.

It is fun to explore the listings. I have found treasure from time to time.

[fishyfishyfishtimes]

It's always so weird to come down from the biology heavens to see what the average person believes about animals, plants, ecosystems, just the world around them. I don't even mean things that one simply doesn't know because they've never been told or things that are confusing, I'm talking about people who genuinely do not see insects as animals. What are you saying. Every time I see a crawling or fluttering little guy I know that little guy has motivations and drive to fulfill those motivations. There are gears turning in their head! They are perceiving this world and they are drawing conclusions, they are conscious. And yet it's still a whole thing if various bugs of the world feel pain or if they are simply Instinct Machines that are Not Truly Aware of Anything At All????? Help!!!!!! How can you look at a little guy and think he is just the macroscopic animal version of a virus

[beanknight]

Containment Breach (wip)

The class-D looked up at the two way mirror protecting the researchers. The vizor of his hazmat suit made it so he could see their outlines and vague movements.

They were panicking. Quick flickers of light and shadow zipping back and forth across the room stopping momentarily to shake and spasm. He looked down at the thing they had told him to clean. The men in the swat gear didn’t say what it was, just shoved him into a plastic suit and said “Clean”. That’s when he first noticed he could see through **their** visors.

“Were they tired?” He thought to himself. Their eyes seemed so much darker than the surrounding plastic. He thought they were bags, but why were they so large? He didn’t have time to question before they pushed him into a hallway leading to the containment chamber.

[chernobog13]

Oh boy, look what UPS just dropped off!

[isjasz]

Stellar death

[vesperosy]

happy dungeon meshi day!!!

[otaku553]

Sabo Week Day 2:

Alternate Universe/Metal Pipe

[forgettable-au]

HOW ARE WE FEELING ABOUT THE NEW DELTARUNE NEWS???!! Just two months more...

I wanted to make something to celebrate, but I have NO time soooo here's another WIP for the animation I'm working on hehe

[takmiblog]

PAM8610 class D Power Amplifier (modified)

2024/09/01　この基板はゲインが+32dB（最大）に固定されているので、-20dBのBass Boost付アッテネータを前置した。大幅に利得が落ちてしまったが小型スピーカでも低音がいい感じで出ている。思えば遠くへ来たもんだ。PAM8610は評価（世評）の低いICだが、ここまで来ればもうこっちのものだ。

　AMラジオを近づけてみると、２０ｃｍ以上離せば影響（雑音）は許容レベルである。発する雑音の大きさ（強さ）は　Zobel Network ≫　アンプ基板　である。

[vitreouspositive]

you think he ever regrets taking dee with him?? thinks about the what if where he handled everything by himself and didn't have to witness d-16's fall (haha. fall...) and megatron's rise?

that is, before he reminds himself that he couldn't have done it without dee, and how at the end of the day, he would do it all over again, cannon shot and all, because he's not gonna take that choice away from his best friend. not when everything else was taken away from him...

[pyr0frnzy]

uhhhh happy pride month guys