Meze 99 Classics Makeover:
Finally I managed to muster the nerve and time to mod my Meze 99 Classics as I indicated earlier.
Why:
I love this 99 Classics, everything about it. The build, finesse and the vibrant sound it offers. However being so attuned to flat neutral and natural sound of Etymotic ER4SR and Shure KSE1500, I found the bass to be a bit too much for my taste. Also I can sense some micro details are somewhat being suppressed mildly in the background.
The good thing is, Meze built this 99 Classics fully modular and highly serviceable. Which means it is relatively easy to dismantle. The mods that I did is totally non destructive and quite reversible (should the results after mod is not up to my expectations).
So here goes:
After the pads are removed, the housing unit and the driver plate are easily detached with the removal of the 4 torx screws. As seen below it already have a circular foam pad serving as dampening substance.
1st stage of the mod is to replace the small pad with larger and denser foam that will fill the entire chamber cavity. Easily fashioned with a sharp scissors to match the cavity shape. Reassembly would require a bit of persuasion to snap the driver plate back as the bigger foam now will need to be compressed down. The goal for this mod is to emulate very limited sonic resonance that usually will result of tightening of bass (as how I have learned from previous closed back headphone mods)
2nd stage is simply the removal of the fabric screen at the front of the drivers. Easily and safely peeled off with the use of knife edge to dislodge the border glue. I was meticulous with this procedure as I want to preserve the fabric screen to ensure I can place it back should the need arises. The goal for this is to allow for better micro details presentation that could be veiled by the screen. The end state, only one layer of screen will be used now which are the one attached to the stock pads
3rd stage, playing with bass breather ports. As commonly done on many closed back headphones, bass breather holes are used in varying sizes. For example Fostex T50rp series will have several ports that you can close/open to influence lower frequency responses. For 99 Classics there's a pair of 3 rather large holes placed on the top and bottom of the driver plate. In this instance I opted to leave only one hole remaining (one each top and bottom). Electrical tape was used to close the holes and these are perfectly reversible as well.
And so everything reassembled and unless I am telling you that this 99 Classics has been modded, there's no way anyone would guess what lies underneath. All looked stock and tidy.
So does it work? Hell yes! it worked.
The difference:
Immediately audible, bass are a lot tighter and tidy now. Very very disciplined and richly textured. Now it does sound a lot more neutral to my ears. Playing through Diana Krall's tunes confirmed my expectations as the micro details are more pronounced with her piano strokes and percussion decays presented with better authority. Spinning through Russian Circles "Harper Lewis" also confirmed that the bass now remained impactful and deep, minus the overpowering presence. Guitars raged with better bite on the riffs much similar to what I normally heard through ER4SR and KSE1200. Most importantly, the 99 Classics vibrancy that we love remained intact.
Bottom line, I am very happy with the results, it exceeded my expectations and loving this Meze 99 Classics even more now