General > General Technical Chat
What's the real reason that laptop batteries are made not-accessible?
SilverSolder:
--- Quote from: magic on December 11, 2021, 01:53:10 pm ---What's a "quack DAC" and who thinks it is more important than what buffer is used to actually drive the headphone load? ;)
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"quack DAC" lol! :D I'm guessing it's 4 DACs in parallel. Maybe you can get better accuracy that way, I don't know! Probably mostly audiophoolery. Agreed about the output amp/buffer being more important....
[Edit: Quad DAC is essentially a marketing name for an ESS brand DAC/Amp chip. It features a 32bit 384 kHz "quad" DAC stage, which is obviously way overspecced for audio frequencies. ]
My criteria for a smartphone are:
1) Must have SD card slot for big FLAC music collection.
2) Must have replaceable battery, and must have availability of extra large capacity batteries!
3) Must have headphone jack to drive headsets and classic car AUX inputs. Bonus for higher quality audio circuitry!
As a result of this thread I've been looking at what's avaliable, I've ended up ordering a V20 to have a closer look at - on paper, I like it a lot for my use case!
The Galaxy Xcover comes close, but because nobody makes extended size batteries for it (yet, at least) it isn't ideal for me. I'm guessing that this model will catch on eventually, it is probably still a little too new to have developed a supporting ecosystem of extended batteries!
SilverSolder:
--- Quote from: NiHaoMike on December 11, 2021, 03:20:56 pm ---
--- Quote from: SilverSolder on December 11, 2021, 01:46:00 pm ---And then there's the fact that the girls like wired headphones, so who's the loser now? :D
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USB is wired, no problems there. I think it's mainly gamer girls who prefer wired since Bluetooth has higher latency.
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If you look at the article in the link, it appears to be the "It-girls" that find the wires satisfyingly bohemian! :D
SilverSolder:
--- Quote from: ogden on December 11, 2021, 03:33:21 pm ---
--- Quote from: SilverSolder on December 11, 2021, 01:46:00 pm ---If the benefits outweigh the disadvantages for you, fine. But you have to accept that not everyone comes to the same conclusion!
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Sure. That's why we have endless list of different shopping choices. BTW I prefer function to fashion/religion and use what is best for occasion. When sitting @computer - I will be using decent wired over-ear headphones. As soon as I expect myself moving, I do not put studio headphones in my pocket, but rather BT earbuds. Charging is not an issue either - because earbud case can receive charging wirelessly from phone back-to-back.
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I do the same thing, except I do carry (smaller) over-ear headphones on the go too, because I find earbuds intensely uncomfortable. I also have two older cars with AUX inputs. One of them does support Bluetooth, SD cards, etc., but the sound quality of the AUX input is significantly better (when sourcing from a quality external FLAC player). I have high hopes for the LG v20, let's see how that works out!
PlainName:
--- Quote --- because earbud case can receive charging wirelessly from phone back-to-back
--- End quote ---
Don't know if I think that is good or bad - on the one hand, as you say, you always have charged earphones, but on the other phone battery life can be an issue without some external thing draining it on the sly.
magic:
There is a public datasheet of this DAC :o
https://www.esstech.com/products-overview/digital-to-analog-converters/low-power-dacs-and-socs-to-headphone-socs/
Built-in headphone amplifier, voltnuts wouldn't approve. No specs at loading less than 300Ω.
No explanation of Quad DAC technology, but it's "acclaimed" :)
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