2.5mm 4-Pole Balanced Male to 3.5mm 4-Pole Balanced Female Headphones Adapter, for Balanced 2.5mm Output Devices, Aluminum Alloy Audio Converter, Gold Plated

I use Sennheiser HD 558 and 598 Headphones at both my gaming computers. But between my 5 year old and 10 year old they are extremely hard on cables. After paying too much for special Sennheiser replacement cables, I decided I would take both sets apart, remove the locking mechanism and use a 2.5mm Male to 3.5mm female adapter so i could use standard headphone cables. Initially I bought some cheap china adapters. Was like $7 for a 2 pack, and while they were basically a drop in option they just didn't hold up over time, when i move my head audio cuts out on one side. So I was back to square 1 looking for a solution. I bought a couple different adapters including one of these, it seems much higher quality and is a much tighter fit. Unfortunately it's not a drop in option. Its slightly larger diameter. I had to remove the chrome bezel and used my soldering iron to melt the hole out a bit larger. It looks fine, and I'm hopeful that this will be a final solution. I really think it will be, the quality is much better than the previous adapter, and it fits both the headphones and cable much tighter. I went ahead and ordered a second adapter for the other HD558 headphones. I do not use the balance feature of the adapter, so i cannot comment on that. However I can say it doesn't hinder anything either. It works fine, I have stereo sound, and maybe it's placebo but i'm 90% sure this adapter made them sound better and louder.

No audible degradation in sound that I can tell. Build quality seems very good. Note: Product images on Amazon show EXACT pin out very clearly, unlike other brands where it ambiguous as to what you are buying. Good job, Geekria.

TL;DR - Okay, this is my apology to Geekria. You get 5 stars for making a good product, despite my concerns about longevity due to weight hanging off the 2.5mm jack. In previous versions of this review, I was sure this was not a true balanced adapter, based on wording of the above marketing materials. I actually physically disassembled this piece, and I could confirm visually, that not only does the male jack have 4 poles, but the female jack does as well, and they are all connected by separate leads. In conclusion, this is a real balanced adapter. If used properly, with 3.5mm 4-pole balanced-terminated headphones, it should not damage balanced amplifiers. My only other concerns to note here, is that the 2.5mm jack isn't very thick, and having seen 3.5mm jacks snap easy, putting the weight of a larger connector hanging off the 2.5mm jack worries me. However, I understand it's better, in theory, to solder the 2 connectors together with as little distance/wire between them as possible. **NOTE** - I want to briefly speak on "stereo-balanced adapters" here, and state that the main difference between differential and shared-ground designs, from a performance perspective in regards to headphone driving ability is more power. When using balanced speaker setups, balanced connections have a greater ability to reject common ground noise, or hum over longer cable runs, in studios. Headphones generally have such a short cable run, that unless something is very wrong with your setup, balanced should not solve any problem you're having specifically with the sound coming out of your headphones. However, amp circuits designed for fully differential wiring should not be used with shared ground terminated headphones/cables. People much smarter than me say that you will damage an amp by attempting to do so, it's only a matter of time. Therefore, regardless of the above, I highly recommend that you DO NOT attempt to run your 3-pole headphones balanced with this adapter. BUT, you should feel no worry running this with a fully differential/balanced-terminated pair of headphones.

This product is very sturdy and may work with other devices, but it does not work with Panasonic cordless phones. When you plug this adapter into your Panasonic cordless headset, then plug your corded Apple earbuds into the adapter, you can hear the other party clearly. They can also hear you clearly. The problem is when the other party speaks, they hear an eco on their end. I tried different sets of earbuds and got the same results. I tried two different Panasonic cordless handsets and got the same results. I am not sure what the problem is, but it appears to me there is some sort of faulty design with this adapter for Panasonic cordless phones.

Seems well made and sturdy, feels nice in the hand, solid metal. But the website description is wrong about the dimensions. It's is 0.9cm wide, not 0.6cm like they say. So unfortunately it will not fit into my ADAM audio H200 headphone jack. Very annoying now I have to return, take to the store, wait for refund, buy new product, wait for that. Sigh. Please update your description, it matters what the exact dimensions are!

I forgot to count the bands on the plug mine only has 2 this one has 3

El sonido con este adaptador balanceado en mi fíioM 11 Mejoró muchísimo

It works

I have only just received this and am still assessing it's sound quality. Build quality seems fine. What I wanted to say is the connecter came with a small carrying bag with draw cords just right size to carry my mp3 player! Really please with that so thanks!

Perfect do the job tried it with FiiO BTR5 and beyerdynamic DT 770 Pro the 80 ohm, the sound much better and higher

Corpo in metallo, nessun problema d'uso, Consiglio.

Seems like good quality. Lot of packaging for something so small but it's the quality given. Stereo works when connecting with phone and Bose headphones without a issue. Don't work in stereo mode on pc phone yes.

Handy little thing that enables me to use the balanced output on my A&K dap. I was swapping cables but this was a faff, especially with different size connectors on different headphones. This solves that issue.