Ronnie - yes.
Fred = no dac. this is digital only. Look at the back - it's only digital
Way too expensive for what it is. It's US$400 on Taobao
ǬÁúÊ¢QLS QA660 ĸ´ø¼¶Êý×ÖתÅÌ ·¢ÉÕHIFI ²¥·ÅÆ÷ 24bit/192K-ÌÔ±¦Íø
IMO you'll do better to buy a netbook and a cm6631a usb card.
Fred = no dac. this is digital only. Look at the back - it's only digital
Way too expensive for what it is. It's US$400 on Taobao
ǬÁúÊ¢QLS QA660 ĸ´ø¼¶Êý×ÖתÅÌ ·¢ÉÕHIFI ²¥·ÅÆ÷ 24bit/192K-ÌÔ±¦Íø
IMO you'll do better to buy a netbook and a cm6631a usb card.
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QA-660 vs netbook
The rational (from qlshifi website)
Perhaps this is just mumbo-jumbo marketing BS. What I do know is that after modifying the QA-550 with a new clock and Paul Hynes shunts, the QA-660 beats it out of the box. Not to mention the large OLED display, dual clocks, mp3/flac capability (albeit at limited rate) and 24/192 wav. No amount of DIY (at least for me) would get the QA550 to that level.
The rational (from qlshifi website)
Perhaps this is just mumbo-jumbo marketing BS. What I do know is that after modifying the QA-550 with a new clock and Paul Hynes shunts, the QA-660 beats it out of the box. Not to mention the large OLED display, dual clocks, mp3/flac capability (albeit at limited rate) and 24/192 wav. No amount of DIY (at least for me) would get the QA550 to that level.
Asynch USB does not have this problems.
"CDP is always far better than PC-HiFi" = not correct.
You can do fft test on QA output ? How much period jitter, phase noise, etc ? I am very interested in results. Opinions usually are new is better, so tests results are very important.
Has the QA have sata for ssd ? hdd ?
"CDP is always far better than PC-HiFi" = not correct.
You can do fft test on QA output ? How much period jitter, phase noise, etc ? I am very interested in results. Opinions usually are new is better, so tests results are very important.
Has the QA have sata for ssd ? hdd ?
how do you connect via I2S TDA1541A and QLS QA550?
i have both devices and solder 4 wires from qls qa550 board to 1,2,3 and 5 (gnd) pins on tda1541a but i don't hear normal sound - only on highest volume level i hear music with many noises. so it's not direct connection? i connect ESI Juli@ by 4 wires tomy tda1541a and its work perfect! what's wrong now with QLS QA550?
i have both devices and solder 4 wires from qls qa550 board to 1,2,3 and 5 (gnd) pins on tda1541a but i don't hear normal sound - only on highest volume level i hear music with many noises. so it's not direct connection? i connect ESI Juli@ by 4 wires tomy tda1541a and its work perfect! what's wrong now with QLS QA550?
That would make so much sense to me. My flac library is 500gb and growing. A external drive interface would make this so incredibly expandable. An Ethernet interface with a rest api would let me control it via my cell phone or tablet which would make this so much better... For now I'm stuck with foobar as I really don't think the external player semantic works well with the storage limits.
I'd love to get diyAudio community engaged with a manufacturer to get the requirements right....
my connection now is:
LRCK -> LE/WS
BCK -> BCK
DATA -> DATA/LDATA
GND -> GND (A) (pin 5)
MCK -> not connected.
is it right or not? why its not working like with ESI Juli@?
Hi,
it seems not so simple, I am not an expert but have a look at my DAC schematics/abstract/
Cheers,
Ignat
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Bigger LCD need firmware mod. Unless you just change LCD with bigger one and same character.
I refer to this post on this thread www.diyaudio.com/forums/digital-sou...ard-16-44-1-wav-transport-30.html#post3162491 , i have pm/email him but no response.
there is also another blog with different lcd, tried to contact this guy on tweeter but no reply yet. https://myl8test.wordpress.com/audio/qls-qa-550-sd-card-wav-file-player/
I also have contacted clark (qls contact person) but the answer is no any bigger lcd
it seems that this product no longer imported by kk anymore, i got lucky that my friend let me buy his player. I've just replaced the clock to tentlabs, change some caps, remove optical out, change coax to bnc, and lastly use separate regulator using LT1085
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Present state of one of my QA550's:
Shunt-regs from -EC Designs- on clock and main receiver chip supplies, the last one in series from a Teddyreg.
I am waiting for a better quality clock.
Guys, put good discrete regulators: it is worthwhile.
Best regards,
M.
that's fugly
I just tested using 16x2 lcd, bought it from arduino community, it's cheap and have backlitgh, but the char displayed is only 8x2, i'm emailing clark from qls if any other firmware can be used to display more char.
I just find a proper case for this player, only need to make a custom faceplate, maybe using hardwood. original one is 10mm thickness, impossible for handrill
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Yeah, I'm dirty to work...
Yours is lovely.
Consider using the I2S out directly to a DAC and upgrading regulators.
My secret weapon for digital sounding analog, which make the skeptics laugh, is Dammar varnish enriched with graphite powder applied to the receiver and DAC chips. Almost free tweak
I have to revarnish this unit.
Good luck.
M.
My diy AD1865 dac only accept BNC input, while upgrading regulators will not come in any short time, still have other diy projects to come
good news for anyone who is interested to get more text, Clark just sent me a dedicated firmware for 16x2 display (firmware name has suffix 1602) and it works. However some differences compared to original firmware on how items are ordered, which you may like or dislike.
I also asked clark if any firmware for bigger display, maybe 32 or 64 char
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