I was going through this thread for a good week or so. Finally my Stax 3100 system is here and I'm happy to share my initial impressions on this system. This is actually an upgrade of my HD600 which I was very happy about. I had a chance to give Audeze LCD-X a try for a few days also.
I must say that I had quite high expectation after reading reviews (no, I didn't audition L300 before). What I'm extremely happy about is their weight. After spending all day with LCD-X (675grams) my neck was in pain for few days. Stax are almost the same weight as HD600 which I like.
L300 are very airy and detailed. Love this part. This was my first impression on sound. Also seemd little bright at first but probably because of huge amount of details and air. Sound stage bit smaller than LCD-X but more precise and tidy. Luckily bass is not as overwhelming, it's just about right on most tracks, just sometimes doesn't go as deep as I like (I'd blame pads as I'm not getting right seal). Mids are my problem just a bit. I have a feeling that Audeze offered a bit more refined and structured mids. More rich. (I may be wrong, this may be also due to Audeze's warmness. I need some more time to come to final conclusion). But this was something I valued LCD-X the most and it's missing here a tiny bit.
Build, is... hmm. Just ok. Nice, soft cable, quite poor headband plastic, bit better earspeaker plastic, very thin pads. My ear is touching the inside plastic (but surprisingly it's not as iritating as for other cans. I can handle 4-5 hours).
I've seen many threads and videos about replacing pads from L500 but I'm not a huge fan of leather (natural or synthetic), I would rather get some velvet so I will try to DIY own pads. Plastic is ready, memory foam and few pieces of nice soft velvet I could get for 10 euros + basic sewing skills. If that doesn't work I will get L500 pads...
This is just my impression. I'm not experienced but happy to own Stax system.
