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itsamepe
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
MrChiSox
Big changes coming to my tiny little music room, I've recently purchased a new stack. Currently figuring out where to locate it all and ordering up the necessary cables, it won't be too long before I'm up and running. I am now the proud owner of a brand new stack. It's a European brand called Earmen. Amp, DAC, Streamer & Linear Power Supply. It won't be long!
https://www.youtube.com/watch?v=MB15yM4UptQ
Apr 23, 2024
Briankan
Recommendation for my next headphone set? I have Koss 95x
Hey all, What would you recommend I get next and why? I have Koss ESP-95x electrostatic massdrop headphones. These are my first and only audiophile set. I love them. I think my only real requirements is $500 or less for the headphones and that they have a little more low end. I don’t need thump but these are really light on lows…but the experience is still awesome. Also any recommendations on an amp? I only have my electrostatic thingy. I am using the Topping D50 DAC. thx!!
Apr 22, 2024
Simthaniel
Rigs
Modded headphones with qudelix at the core
When I received the Qudelix 5K, I had already modified a pair of Superlux HD-681 headphones. I previously soldered my own balanced connections to the drivers, providing multiple ways to connect and...
Apr 14, 2024
brothamike
A decent set of IEMs
I am in the midst of a 300 hour burn-in but, I will say I am enjoying how this set sounds so far. Before I received these which was btw late by a few weeks, I purchased a Sony/Kimber Kable MMCX...
Apr 12, 2024
merrick97
Should I exchange the PC38X for better headphones?
I bought the PC38X headphones FOR GAMING and they are great, but I have NO use for a Microphone since I don't do competitive gaming and I was wondering if there were better headphone options at a similar price without a headphone, where (presumably) more of the cost was put into making it sound better. I also find that my PC38X don't get quite as loud as I would like and I was wondering if a cheap amp like the iFi Go link would draw a little more volume out of my phones. https://www.amazon.com/dp/B0BN6MM822?psc=1&ref=ppx_yo2ov_dt_b_product_details I went with the PC38X since it was considered the best bang for buck headphones. I care most about using spatial apps like DOlby Atmos and DTS Headphone:X. Suggestions are welcome.
Apr 11, 2024
LostnAmerica
Sound Signature of the Grell Project.
Wondering what type of sound signature the Drop Grell project headphones will have or trying to attain. Any update would be appreciated.
Apr 8, 2024
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Here is a downloadable User Manual Link: https://s3.amazonaws.com/massdocs/UserManual_MassdropxEddieCurrentZDTJr.HeadphoneAmplifier.pdf It is now on the drop page. There is a section about checking interference from wires on the back and tubes on the front. Someone had an issue with the CTH and found his router was the culprit. Hope that helps!
PictureAbove: Another problem I have noticed which is really dicey is that after flipping the switch to the ON position, or Up, no power to the unit. At first I thought the hum was gone but realized there was no power to the unit. It has done this once the other day and I thought I was crazy. Happened at least 4 or 5 times today. Ive only had this thing for 2 days.
https://www.superbestaudiofriends.org/index.php?threads/laconic-lab-night-blues-tube-transformer-coupled-amp.1091/page-9
My unit has hum in both channels (perceptible with HD 650/800, LCD2C, etc.) even while potentiometer is dialed down, inputs are disconnected, no nearby wireless devices (of significant power), and using a power filter (PST-8D) with only devices using linear supplies connected. The 60 Hz noise isn't affected by gain and it affects both channels ~~with equal intensity,~~ so I would assume it is unlikely to be the tubes. I would hazard to guess that something isn't filtered (bad caps?) or shielded properly internally.
Edit (Aug 09): Not equal intensity after closer listening.
We have also heard a couple of users report hum dissipating after lots of hours with the amp...has anyone heard improvements or those who have hum still have consistent hum?
- After some usage I noticed the power switch was somewhat unreliable where the tubes and the orange LED would not always illuminate after flipping the switch on. The amp would power on if depressing the switch slightly from the on position or trying again more slowly. I can tell that there is a power transient occurring (Schiit Eitr glitches - bad USB on the un-isolated side I think - its LED flickers and sound stops with certain noisy mains power transients) when flipping the switch so I don't necessarily think it is a (or only) mechanical issue with the switch.
- Some days later I observed a higher frequency noise (I would need to measure to determine what frequency and I cannot be entirely certain I hadn't missed it before) in the channels with a proportion difference relative to the low frequency hum (i.e., stronger in the right channel like the hum; though less perceptible than the hum) that was also detectable with something like the HD 800 and more so with high impedance output.
- On another day after with one of the incidents with the powering on (coincident but I don't know if correlated), the hum and noise are now much less than before in the right channel (not entirely gone I think) but still distinguishable in the left (I cannot recollect how it compares now to before the change) and of course more so on the high impedance output.
(If the issue can change like this I think it would counter indicate the primary problem being shielding. Speculation: Aside from component differences between productions (and the 115V transformers), if I recall correctly from when the ZDT Jr. was announced, it was said that the only circuit change was changing a resistor value compared to the original Laconic design, so I would wonder if this had an effect (e.g. stability/oscillatory effects?) if there weren't prolific reports of problems with the original product.)
- Today the powering on issue became much worse, whereas before the amp would power on within ~ three attempts, I suspect it was closer to fifteen (over a few minutes) before it did. While I hope this is a statistical anomaly it causes immediate and especially long term reliability concerns if this happens on my next attempts to turn it on.
[Update 2018-10-04: I should mentioned that I have not had issues with powering on the amp since when I originally posted this message. I guess in retrospect, that issue and perhaps some others I had early on were separate problems from the hum that has since been root caused to be due to the magnetic field of the power transformer - that is the only issue I am still observing]
It really does seem like a large number of these amplifiers are having issues despite the official wording of "a few drop participants". While the amp sounds good when the humming/noise is obfuscated, these issues really aren't appropriate for an amp in this price category, and I don't really want a refund at this point after waiting so long, but instead a repair or corrected replacement (I am doubtful the units in the current batch would not have the same issues).