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
More likely B.S...
Never seen a credible spec taking with a useful standard that can place THD+N that low, largely due to a total lack of equipment capable of that kind of measurement.
And regarding the topology, unless higher-order distortions are controlled just as much as lower-order distortions, the THD spec will not be even remotely useful.
The topology that THX claims to use here is a high-efficiency dedicated low frequency design. If the website is factually accurate (doubtful in light of other incorrect statements on the site), then the current feedback will not manage higher order harmonics well at all, and the general sound will be similar to a saturated class-D amp.
None of it even approached 140 dB, and the best I have ever seen was the LX800 prototype which could manage 138dB. Chris Straum is dead now, and there is a 0% chance he would ever work with THX.
Here is the spec with the reference design: https://www.triadsemi.com/wp-content/uploads/dlm_uploads/2016/12/triadsemi_tsthx88_productbrief.2016-12-19.pdf
APx555 Loopback @ 5.5 Vrms, 1 kHz
Massdrop THX AAA 789 @ 5.5 Vrms, 1 kHz, 300 Ω (100 mW per Ch):
Massdrop THX AAA 789 @ 0.55 Vrms, 1 kHz, 300 Ω (1 mW per Ch):
Edit: This is really interesting, can you run this with a set of 10-20 ohm cans or iems?
I think I'll buy one just to put on my analyzer, to see if the hype is real.
The crazy good specs for this headphone amp are @ zero gain... it remains to be seen what happens in different scenarios.