Sockets of sennheiser hd600 broken

Hi David, comment that cables are wrong in the transmitter, to try to find the best possible solution
I wait your answer
Greetings Franco Dosil

Hola David, comenta que cables estan mal en el transmisor, para tratar de encontrar la mejor solucion posible
Espero tu respuesta
Saludos Franco Dosil
https://www.fullcompass.com/brand/sen-sennheiser/replacement-parts
https://en-us.sennheiser.com/accessories
http://www.hifiheadphones.co.uk/spares-accessories/sennheiser-spares.html?currency=EUR&dir=desc&limit=5&mode=list&order=name

0.6 m cable: http://www.custom-cable.co.uk/sennheiser-replacement-lead-3m-en-2.html
1.2 m cable: http://www.custom-cable.co.uk/sennheiser-replacement-lead-for-ie8-1.2-metre-length.html
1.2 m cable with remote and mic (for iPhone) http://www.custom-cable.co.uk/sennheiser-replacement-lead-for-ie8i-1.2-metre-inc-mic.html

Sounds like you need a new cable, the common ground connector is likely broken (open circuit).

Often gives a sound like being underwater :-)

It's likely the groud connection in the cable is broken. Possibly at the plug, it would mean no centre focus and no bass as the headphones get only out of phase sounds. I'm guessing you've tried them in another device - a faulty sockey would do the same.

Broken audio cable entering the transmitter or audio jack plug.

Power supply plug loose / faulty power supply.

Go inside and test the speaker with a small low power battery, connect it quickly (just a quick touch) to the terminals of the speaker, it should pop! If it doesn't it's gone.
If the Sennheiser don't have replacements, then it's bin time!

It looks like the speaker has gone. Check with your local authorised dealer for a replacement speaker.

One speaker element may be blown or wiring may have internal break. It may be cheaper to relace the phones rather than having them serviced, unless they are still under warranty

I've discovered the solution to the problem, I think. What has probably happened is that while wearing the head phone you have probably caught the cable any number of times on door knobs, under your heal, or perhaps around the feet of a passing dog. The cable is very long and very strong — it's Kevlar reinforced.

All this jostling has tended to bend the pins and probably the sockets they plug into. Using a delicate pair of jewelers pliers, preferably smooth-jawed, gently bend the pins outward (maybe even inward) so that they once again make a firm contact in their sockets. It's worked for me pretty well so far.

The fact that some people get no improvement from cable replacement suggests that the problem is with the internal cable sockets. The solution is still the same. I notice after doing a tweek that the plugs feel tight again.

It should be easy - I just eased mine out by pulling on the top and bottom parts of the headphone cushion/pad.

Hope that helps