Full review here:
http://www.head-fi.org/t/748220/review-rha-ma750-flawless-victory
Sound:
The overall signature is of a very, very wide U-shaped form, with equal and excellent extension on both ends. The bass is very special and takes a really different form than the MA350, RHA entry-fi previous model, and many other mid-fi earphones that the MA750 compete against. Instead of focusing on a strong and thick mid-bass centered low-end, the MA750 offer a flatter response at the mid-bass section. It's still rather strong as dynamic drivers can get, but doesn't show a certain lift or peak. On the other hand, what the MA750 really have is an impressive sub-bass response, with definitely more emphasis than the rest of the bass making it a more refined and less tiring earphone. As such, the bass is deep with a very good rumble quality, well bodied and layered, and yet fairly quick with a natural sense of decay. Not a bass cannon by any means but capable of showing more than enough power when needed. Both the Dunu DN-1000 and Brainwavz S5 have a much mid-bassy signature what might be more 'fun' for some, but this RHA set is more refined and better controlled over those ones.
The midrange of the MA750 is something unique. Neither forward nor recessed, but pretty much neutral in position. It's very clear and open, carrying a fair sense of warmth yet clean of bass bleed, though it does need some period of burn-in to bloom and achieve a perfect weight and dynamics. Even though it's already very impressive from the first listening sessions, personally I found that it took about 200 hrs to settle down and finally show the real strengths. The midrange it's not only well balanced with the lows and highs, but also intelligibly textured and bodied for excellent instrumental and vocal performance. Overall midrange clarity is at least on par with the RE-400, though both single dynamic models differ in flavor; the RE-400 giving higher priority to more forward, effortless and sweeter vocals, while the MA750 is emphasizing instruments a bit more and a bit drier in the vocals dept.
Treble is pretty much a mirror to the bass response. Transition from upper mids to lower highs is very smooth and main treble is relatively flat, or at least doesn't show certain peaks. What the MA750 really have is a stronger emphasis at the upper treble region for better extension and wider stage. With the stock single tips, the MA750 could classify among brighter IEMs; not a 'hot' treble set but yes a sharp one. The R-50M, DN-1000, Altone200, or even the DN-2000, all TWFK dual BA based phones, are expectedly hotter on the mid-treble, more tiring, and probably more prone to sibilance (with exception to the DN-2000 which is surprisingly smooth for a TWFK hybrid phone). The RHA MA750 are not lazy either, but are just more focused at the upper treble. Overall micro-detail is very good, though not as microscopic-detailed as the above BA variants, but really well done for the asking price and higher. Instead of being frontal and analytical, details come in a more dynamic way which requires some time to truly appreciate them.
So far so good, and this RHA model excels in every region. And yet, where I find the MA750 really shine is in stage and instruments, and especially in timbre. Soundstage is rather big and very spacious as usually proud good dynamic drivers IEMs can get. It's wide with equal sense of height and depth, giving a very good 3D surrounding effect. The MA750 sound is bigger than the Altone200 and R-50M but not as huge as the Dunu DN-1000, not to mention the enormous sounding DN-2000 with their much out-of-the-head sound. Actually it could be similar to a balanced well driven Hifiman RE-600. Instruments are way awesome, both in separation and quality. They have the detail, the texture and the weight, and also a very natural decay and right timing. Be it drums, strings, horns or cymbals, all of them are presented in an engaging and immersive way.
And finally, the timbre is "perfect", and personally the best characteristic of the MA750. Not even the hybrid DN-2000 has this beautiful natural tonality, despite their higher detail; but the hybrids' disadvantages are hard to totally avoid. The only set that could really beat the MA750 in this regard is the RE-600, and only when the strong AMP-S amplifier is used (and we're talking about $600+ setup here). Still, all this comes under one condition, the eartips. I tried different tips, including the RHA self MA350 tips, and found that the MA750 stock single tips provided the best sonic results and this great timbre, tonality and imaging.
http://www.head-fi.org/t/748220/review-rha-ma750-flawless-victory
Sound:
The overall signature is of a very, very wide U-shaped form, with equal and excellent extension on both ends. The bass is very special and takes a really different form than the MA350, RHA entry-fi previous model, and many other mid-fi earphones that the MA750 compete against. Instead of focusing on a strong and thick mid-bass centered low-end, the MA750 offer a flatter response at the mid-bass section. It's still rather strong as dynamic drivers can get, but doesn't show a certain lift or peak. On the other hand, what the MA750 really have is an impressive sub-bass response, with definitely more emphasis than the rest of the bass making it a more refined and less tiring earphone. As such, the bass is deep with a very good rumble quality, well bodied and layered, and yet fairly quick with a natural sense of decay. Not a bass cannon by any means but capable of showing more than enough power when needed. Both the Dunu DN-1000 and Brainwavz S5 have a much mid-bassy signature what might be more 'fun' for some, but this RHA set is more refined and better controlled over those ones.
The midrange of the MA750 is something unique. Neither forward nor recessed, but pretty much neutral in position. It's very clear and open, carrying a fair sense of warmth yet clean of bass bleed, though it does need some period of burn-in to bloom and achieve a perfect weight and dynamics. Even though it's already very impressive from the first listening sessions, personally I found that it took about 200 hrs to settle down and finally show the real strengths. The midrange it's not only well balanced with the lows and highs, but also intelligibly textured and bodied for excellent instrumental and vocal performance. Overall midrange clarity is at least on par with the RE-400, though both single dynamic models differ in flavor; the RE-400 giving higher priority to more forward, effortless and sweeter vocals, while the MA750 is emphasizing instruments a bit more and a bit drier in the vocals dept.
Treble is pretty much a mirror to the bass response. Transition from upper mids to lower highs is very smooth and main treble is relatively flat, or at least doesn't show certain peaks. What the MA750 really have is a stronger emphasis at the upper treble region for better extension and wider stage. With the stock single tips, the MA750 could classify among brighter IEMs; not a 'hot' treble set but yes a sharp one. The R-50M, DN-1000, Altone200, or even the DN-2000, all TWFK dual BA based phones, are expectedly hotter on the mid-treble, more tiring, and probably more prone to sibilance (with exception to the DN-2000 which is surprisingly smooth for a TWFK hybrid phone). The RHA MA750 are not lazy either, but are just more focused at the upper treble. Overall micro-detail is very good, though not as microscopic-detailed as the above BA variants, but really well done for the asking price and higher. Instead of being frontal and analytical, details come in a more dynamic way which requires some time to truly appreciate them.
So far so good, and this RHA model excels in every region. And yet, where I find the MA750 really shine is in stage and instruments, and especially in timbre. Soundstage is rather big and very spacious as usually proud good dynamic drivers IEMs can get. It's wide with equal sense of height and depth, giving a very good 3D surrounding effect. The MA750 sound is bigger than the Altone200 and R-50M but not as huge as the Dunu DN-1000, not to mention the enormous sounding DN-2000 with their much out-of-the-head sound. Actually it could be similar to a balanced well driven Hifiman RE-600. Instruments are way awesome, both in separation and quality. They have the detail, the texture and the weight, and also a very natural decay and right timing. Be it drums, strings, horns or cymbals, all of them are presented in an engaging and immersive way.
And finally, the timbre is "perfect", and personally the best characteristic of the MA750. Not even the hybrid DN-2000 has this beautiful natural tonality, despite their higher detail; but the hybrids' disadvantages are hard to totally avoid. The only set that could really beat the MA750 in this regard is the RE-600, and only when the strong AMP-S amplifier is used (and we're talking about $600+ setup here). Still, all this comes under one condition, the eartips. I tried different tips, including the RHA self MA350 tips, and found that the MA750 stock single tips provided the best sonic results and this great timbre, tonality and imaging.
I am still don't decide to buy RHA or The shure...