Well I can't use tenso because of their new policy (since I'm not living at home right now) so I have to resort to online stores in the US. I listen to a wide variety of music so something well-rounded is best. I'm currently using the AD900X for home and CKM500 on the go, without a DAC or amp for either as of now. The problem is that I can only get one of them right now since I'm a poor college student, so getting one means I probable won't be able to get the other for a while. Is the sound of the WS99 more expansive and larger due to it being a full-sized headphone? How about if I phrase the question like this: If you could only listen to either the WS99 or the CKS1000 for 3 whole months without ever listening to the other, which one would you pick?
Let's see.. you have the AD900X, so that is very good. The WS99's compliment the AD900X perfectly - you get two distinctly different yet awesome sounding headphones, and between the two of them you are set for all types of music.
The WS99's are definitely more of a closed sound relative to the AD900X's. They have a very nice soundstage, but nothing like the AD900X's (which are very airy and expansive). With the 99's, you get a ridiculously amazing bass, an overall warmer sound, with a treble that is not too bright. They are very nicely balanced, and have a beautiful lush signature. They are of course not as airy or with the same imaging or expansiveness as the ad900x's. For me, the WS99's excel at electronic/modern bass oriented music, and the AD900X's excel at rock and acoustic etc.
The CKS1000's seem kind of like a hybrid of the AD900X and the WS99 to me. The way they handle the bass is very much like 99's, and the mids are perfect (neither recessed or forward), and the treble is sparkly and energetic. They are very open and airy, with with very wide/deep soundstage, wonderful layering and instrument separation and imaging (like I haven't heard in an iem before). The overall effect is that they bring everything to life and you're immersed by the music. So far they have sounded absolutely amazing with all of the genres that I listen to (mainly electronic, rock, prog rock, pop, korean rap :) etc). So for me the 1K's are the better all-rounders.
If you didn't have the AD900X, I'd probably be recommending for you to get the CKS1000 over the WS99 first. But because you have the AD900X, it's a more difficult decision, because I think that you would love either one. One thing you could consider doing would be to get a cheap but good amp such as the E11 for about $40 to give your ad900x a bit more body and fullness in the low end, and they could easily satisfy your "headphone fix" for a while, and also get the CKS1000 to satisfy your iem fix. Then get the WS99's down the road a bit to complete the trifecta. Just a thought.
If you are looking for a DAC, I am still incredibly happy with the $20 ELE DAC. In fact, the ELE DAC plus E11 is a great cheapo combo.
Edited by waynes world - 4/20/13 at 7:11pm