Originally Posted by ForsakenArcher
I am joining the club as well, removed the grills a few days ago, foam behind the pad also removed, and listening only to HD600 for every use since then. I slightly prefer the sound without the grills. I particularly like how vocals sound even better to me with this simple mod. They sound so close and engaging. Although I will be missing some of the warmth of HD600 with grills on, I still prefer it without grills, overall clearer and slightly wider soundstage and more treble. Next up will be HD650 replacement cable I guess.
Totally agree 100%! You and I must hear things the same way!
You do lose a tiny bit of warmth with no grills, but not too badly. You might still be ok with adding back in the foam from behind the pads.
To me, the 650 cable makes my 600 sound warmer and fuller in the lower mids. Hopefully nobody cries about those comments, but that's what I hear. It would measure the same. Soundstage seems better with stock HD-600 cable (due to less warmth). Sennheiser knows what they're doing and IMO the 650 cable is best for the 650. Nothing wrong with the 650 cable on the 600 though. The 650 does have a higher capacitance rating, but I won't go there.
If anyone is using the HD-600 without the grills and loves it, there is a way to re-create this experience with the grills in place.
What you do is take a tiny square of Creatology adhesive foam (same kind for the HD-800 mod. Sold at Michaels). You make it less sticky with your fingers and place it on the back of the driver on the circle. People can say it will blow up the driver all they want but it has still gets air to "breath" from the sides. Basically it's similar to using HD-580 grills and sort of limits air getting to the driver. It should be about the size of a quarter maybe, but square. Actually slightly smaller.
I was totally baffled how this sounds nearly identical to using the HD-600 with grills off. It's very close. To me the HD-600 sounds more flat with the grills removed or the foam in place. With stock 600 grills the HD-600 sounds like it has a slight mid-bass hump, so most people might prefer this.
With that foam mod you can also tune the warmth and sound with varies sizes. You can even block off just half of that circle "vent" with not much loss of warmth.
With the mod, the HD-600 just sounds so much more clear and detailed. You do sacrifice some warmth, but it depends on what you want. It's also extremely easy to get behind the grills. You don't even need to remove the pads, just the cable. I don't even need to detach the headband, but it makes it easier.
BTW as strange as it sounds, the best way to determine the differences is to use these with gaming. I was playing Fallout 3...
Edited by tdockweiler - 3/1/13 at 1:11pm