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
Sound quality wise, Bass is very controlled. Treble's in a sweet spot: detailed but not fatiguing. Mids are smooth and natural. I'm mostly running the HD6XX (HD650) through the balanced out. Soundstage is realistic, and the separation helps it sound more vast than it probably is. The overall sound is natural and realistic nothing exaggerated. Some sounds are so uncanny, I need to turn to make sure no one's sneaking up on me.
The thing is built like a tank. The unit itself does click with each volume step, as the relays switch on and off. It's actually quite a satisfying click. And those clicks aren't audible through headphones. There are a few clicks that are audible through phones, on specific steps like 39-40. But I only hear them if I'm really listening for them.
The NFB-1AMP is pretty much the same amp section as the 28, but I think it's even quieter and may have a bit more power, being a dedicated amp. In addition to the Summary page on Audio-GD's site the User Manual page also has a lot of useful information. Info that's more focused on specific features, and settings.
From what I remember they have great sound stage, with a bit of grain in the treble. I personally like warmer amps like my Fiio K5 with them. If I remember correctly, the O2, being a super neutral amp, made the grain stand out a bit more. I've heard that the M9xx pairs well with them too. But I haven't tried it myself.
Tube amps are another avenue to pursue, I haven't tried any tube rolling yet with my Little Dot mkII, just running stock at the moment. But it runs at a pretty high output impedance. You might get a little better control with something that's lower output impedance, as the 7xx's are semi sensitive. A good Hybrid Tube could do well, like a Schiit Vali or CTH.
Probably any of the Cavalli stuff that's currently active on Massdrop, would play well with the K7xx. But that's more speculation. Maybe someone else could weigh in on this more.
I haven't got to play them much with the NFB-28, I plan to mod the mini XLR connector on the K7xx to run it Balanced.
But that's why I suggested a Hybrid Tube amp, like the Vali 2 which has an Output Impedance of 1.2 ohms in low gain and 5.8 at high. Which should give you more control, before it gets too loud or distorted. Even with the 6xx I wouldn't go past 12 o'clock on my Little Dot mkII which is too loud for normal listening but with minimal distortion.
There's also other factors that come into play like the actual sensitivity rating. My T50rp mk3s are 50 ohms but have a sensitivity of 92db/v. The K7XX and HD6XX are similarly sensitive at 105 and 103 respectively. So the T50's require more voltage to match volume with the others.
I guess what I'm getting at is it's hard to tell without trying it first hand. But I think the 1/8 rule will get you in the ballpark. Here's some more technical reading on the subject from NwAvGuy's blog. http://nwavguy.blogspot.com/2011/02/headphone-amp-impedance.html
hopefully that's helpful.
In a true tube amp, most of the tubey distortion comes from the output tubes. In a Vali 2 hybrid, it only uses tubes for the pre-amp stage. You got some benefits from tube gain, but it's not the whole package.