Sennheiser PC37X randomly goes bad after disconnecting the cable ?
Greetings, Yesterday I was using my headset like normal with my macbook, just listening to music and on a call with people like usual, and the headset was perfectly fine. The stock wire that came with the headset is extremely long and yesterday it annoyed me very much that it kept getting tangled with itself, so I decided to see if the cable is replaceable. I pulled out the cable from the headset and saw the adapter, and looked online for a replacement. Upon plugging it back in, the audio sounded extremely muffled and washed out. Im not sure what I did wrong to make it mess up like that as I've always taken good care of it, ive had it for about 2 years and its always just been chilling on my desk, but anywho I thought the cable just went bad and ordered a replacement. The replacement came, and the issue is still persistant, so I am not sure what the issue is I've tried multiple different headsets and the issue is not with the port, and I also tried it with my windows laptop and...
Apr 23, 2024
http://www.esstech.com/PDF/ES9018-2M%20PB%20Rev%200.8%20130619.pdf
As GourouLubrik correctly pointed out K2M is a cheaper 2 channel version of ES9018. It's a version EES made for mobile market to use in mobile phones, tablets and mobile DAPs. iBasso DX90 mobile DAP uses two K2M DACs, one per channel.
I've had gear with cheap regular DAC chips inside that sound outstanding and gear with super expensive DAC chips that sound like... meh. DAC chip itself does not make the audio DAC to sound good - the implementation is everything. Circuit layout, onboard stages of power filtering, regulated power supply, etc. If you looking to play anything above 24/96 not to mention DSD its better be a very good implementation.
There is absolutely no es9018 inside, both chip plays DSD256 natively - es9018 has been reported to also work with DSD512 but I don't think this is officially supported.
It's a portable "flagship" - not real flashship (es9012 for stereo only, es9O18 for both mono, stereo and multichannel applications).
es9018k2m consume less energy, but provide only 2 dacs units instead of 8. I won't go into technical details, but using 4 dacs units in parallel make it better/easiers for I/V stage.
es9018k2m cost 18.90$ per unit / 65.90$ per unit at Ismosys (official distributor) You can check prices here: http://ecommerce.ismosys.com/ordering/index.php?manufacturers_id=34
You pointed up a diy kit at 66$ (that needs 3 external regulated power supply which add costs)
es9018 is more versatile, much more complex and costly to use. A good implementation scheme is using separate VCC L+R /VDD L+R /DVCC. That's 5 power supply rails only for the dac chip, Shunt type are advised because the chip is sensitive to output impedance of the power supply. Es9018K2M only needs two.
As you see, ES9018 is still the "true" flagship, but it behave like a diva and consume much more power, so it's much more costly to implement it doing everything right. I prefer to see a 9018k2m properly done that a es9018 done badly.
Es9018k2m can detect the incoming logic signal (spdif, i2s or dsd) automatically, no need to use any hardware or software to config the signal, ES9018 needs a micro-controller for this task.
Still, es9018 has been used in "portable" DAP such as Ibasso DX100 or Sony PHA3. Upcoming fiio X7 is also rumored to sport an es9018.