My T1 is one of my favorite headphones ever.
I like the Beyer sound signature (also own the fantastic DT 880/600 ohm and the DT 1350).
But when i watched some photos of the disassembled headphone, i noticed that the T1 has no dampening material, only plastic.
This is different from the DT880/600 ohm which uses the same semi-open technology but has the dampening inside.
So i decided to try how to dampen the inner cup could affect the sound.
In the beginning this was just a curiosity, but after the mod i noticed that the headphone a had slightly warmer sound, which i like
(i usually like overall neutral headphone with a slight warm timbre).
So i decided to share this mod. Actually my T1 are modded and i think I'll keep them modded.
OK, let's start.
For this mod you need some adhesive felt, small scissors, a small screwdriver, a pencil and some paper.
First thing is to draw on the paper 2 circles, the outer with a diameter of about 6.4 mm and the inner with a diameter of 2.5 mm, then cut them from the paper with the scissors
After this you have to copy the cutted circles on the back of the adhesive felt, using the previews draw to help yourself:
Once you've done, cut the felt with the scissors:
This is the final result:
Now we have to open the headphone. Please be very careful when you do this, the T1 is well built but you need to add an extra care, is always a 900 euro headphone. First remove the pads: gently pull away them and they will come away without problems
Then with the screwdriver remove the plastic ring which holds the driver in place. You have to gently pry on the ear cups to remove the ring.
Now you can remove the driver. Rotate the headphone with the external part of the ear cup upward, put the other hand on the inner part of the ear cup to gather the driver; when the plastic circle is removed, it should come off itself, if it does not, slightly move sideways the ear cups, always with the hand ready to gather the driver.
When you've done, you'll see this:
Notice the absence of dampening material.
Now you can simply put the felt in place and close the headphone
When you close the T1 pay attention that the plastic ring has a precise shape, you have the small protruding plastic piece in right place OR it won't close:
About the sound:
the differences with this mod are not night and day and I'm still experimenting them, but to my ears the sound is warmer, fuller, smoother; the bass has more impact and the male voices seems deeper than before; the hights are very slighlty decreased, soundstage is the same.
I'm curious to hear your impressions, if somebody decides to try the mod.
This mod is 100% removable and the headphone can be restored to original condition, without any problem.
Edited by archigius - 10/6/11 at 10:55am