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
This is an exceptional amp that is a hell of a lot of fun to experiment with (this is where my love of tubes began). First of all the 6sn7 tube is a phenomenal tube (check this thread on headfi if you really want to learn about this tube https://www.head-fi.org/threads/the-reference-6sn7-thread.117677/). Since buying the Darkvoice, I've purchased over 50 different 6sn7 tubes...all of them remarkably different from one another). I change them constantly depending on what I'm listening to. Obviously, you do NOT need 50 tubes to get alot out of this amp (but be careful of the tube bug... it's hit me really bad :) ).
If you get this amp, DEFINITELY replace the stock tubes. For the 6sn7, my favorites have been the vt231 varieties (pretty much all are good, but the Sylvania vt231 and Raytheon vt231 pair very well with the 6xx.. both are generally available in the $30-50 range... just be sure the seller has excellent feedback and experience selling tubes..and they should test as close to NOS as possible). Another tube I have really liked with the 6xx are ones made by Brimar (cv1988....the British variant of the 6sn7). The brimars can be pricey, so you'll need to be patient until you luck upon a deal. I got an amazing NOS Brimar from a seller in Cyprus for $35, but it took a while until that came along). There are also PLENTY of great 6sn7's under $20 (Sylvania 6sn7gta and national union 6sn7gt are two of my favorites in this range).
I also recommend changing the power tube. For about $20, the rca jan-6as7g is a very good bet. My favorites are the Tung Sol 5998 (can be pricey, but a decently priced one comes along every now and then) and lately I've really liked the tung sol 7236, which is VERY similar to the 5998 but can found for much less (I just picked up a very good one for $10).
I have found that different pairings of power and driver tubes make a big difference with the 6xx. My current favorite combination is the Sylvania vt231 and the Tung Sol 7236 (truly sublime). It's staggering how good this amp sounds with the right tubes and the right headphones.
A couple of other comments if you buy the Darkvoice. The 6sn7s tend to hum when you pop a "new" one in ("new" meaning you just bought it). In nearly all cases, unless the tube is defective, the hum will go away. The best way to get rid of hum is to remove the power tube (with the amp turned off of course), put the 6sn7 with the hum in and then turn on the amp. And then leave it on like this for several days straight (at worst a week). After doing that I haven't had the hum return for any of those tubes.
One final note... this time about the 6xx. I strongly recommend making some relatively easy mods that will truly bring out the best in these cans. I did the dynamat and felt mods recommended here: http://www.superbestaudiofriends.org/index.php?threads/sennheiser-hd650-love.44/#post-446
Ok, that's enough for now
Just checked and saw one for $35 with best offer accepted. This was the seller I purchased from with a $25 offer (actually purchased 2 at that price).