The D3020 is the newer, black, vertical standing amp, right? If so, great to hear you had similar results. I might look into it if I want a cheap-ish speaker/headphone amp. Looks like a solid unit!
Now, assuming we heard the same things, isn't it awesome how well the MSR7 scales with power? At first I supposed that a headphone that's so efficient wouldn't really care about power, but apparently it does care a lot. These things just keep on giving...
With that said, I have observed that after modding them, they care about power even more. It probably has to do with the fact that the driver has more air accessible to move. Adding power almost always leads to stronger bass. Not more usually, just better. The already excellent and fast bass of the MSR7 go one step further and hits with more authority, kicks sound heavier. I thought I'd want a beefier amp just for my 58x, but it turns out that the MSR7 may benefit more from one.
Good for you buddy, good for you.
On another note, a friend of mine had these (He is a DJ) and I don't really like them. They seem to try too hard to do bass. Everything else was MIA. Low end detail was good, but that was about it, anything other than electronic music didn't sound good on them. The MSR7 are a far superior all around headphone IMO.
@ModiHiFi
So, I tried your stuff. First off, let's get the medical tape out of the way. I can't really hear a difference. Nothing that I can be sure of, anyway. I will keep it on, however, just to prevent hair and dust from getting in the driver housing. So it's a good change, even if it's only for that.
Felts! I couldn't find the Vlieseline stuff anywhere here, but I did find a store that carries sewing supplies and I asked the people there. They gave me a piece of felt that is, according to them, similar to Vlieseline's stuff. It's compressed cotton too, so I suppose it's at least similar. I have mixed feelings about it. On one hand, it completely tames the treble. There's no more peaks to speak of. But what it also does is make the headphones sound a little bit muffled, like they took a bit too much away. They also killed a lot of detail, sadly. But I think the stuff they gave me is probably too thick. It's a good mm thick actually. I will try to find something half as thick or thereabouts, preferrably like the thin felt AT uses internally. I will also try different placements to see how it changes. Like, the headphones sound a bit livelier if, instead of using a big piece of felt under the pad, I stick a small disk of it on top of the driver, like the pad cloth I did previously. I will also try getting a big piece under the bad, but with a disk cut out of it so that it doesn't directly cover the driver, then I will put the other cloth back on. The possibilities are almost endless at this point.
Everything sounds good, don't get me wrong, we're at the point of fine tuning these things. I'm just after that last 5%...
PS : With the felt on the efficiency went down. Now I need to push my Q1 almost as hard as I do with my 58x. Oh well.