No chance to try the Tennmak Pros yet, I can't stop listening to music with these Brainwavz B100s, they are seriously good for £50.
The only negative is that they are all plastic and considering the small diameter nozzle they feel a little delicate while tip rolling. Once the tips are fitted they feel fine though and they are so light and ergonomic I can barely feel them in my ears, they are ridiculously comfortable. There is no remote with these, so if that is a deal breaker then no need to read any further.
They come with a nice zip up hard case and a decent selection of tips for this price point, providing two pairs each of small, medium and large silicon tips plus one pair of medium foamies. They also come with a cable clip and a velcro cable strap. The narrow nozzle diameter means they will need the same kind of tip size used by Westone and Shure, so availability won't be a problem.
Then there is the sound...
The sound signature is quite neutral, so no enhanced bass or treble, just a natural sound that has very good extension at both ends. The highs are very good, tons of detail and quite airy. Considering these are single balanced armature IEMs, the bass while not boosted, dig very, very low.
Then there is the sound stage and imaging and that forced a holy **** out of me during my initial listening. The sound stage is quite wide, definitely reaching outside of my head and it is not only relatively wide for an IEM but has good depth too. The crowning glory though is their imaging, which is better than any of my other IEMs by some margin and easily better than my full sized headphones (Senn HD650, AKG K702, Sony MDR-1A & MDR-100aap). I've been listening to songs I know well, such as Hotel California, Rikki Don't Loose That Number and although it's a major cliché, I really have been hearing details I've never heard before and that is entirely due to the incredibly accurate imaging and stellar separation. Silly things like hearing Steve Howe breathing while playing acoustic guitar on Mood For A Day.
I played Queen's "The Prophet Song" through my Fidue A73s, which are a very well respected £100 hybrid IEM with a dynamic driver and a balanced armature driver and the Brainwavz just completely blew them out of the water. Not only did the vocals sound more natural but during the "choir" section, where Freddie uses massive multi-tracking, through the Fidues the voices were arranged in more or less a straight line between my ears, whereas the Brainwavz arranged them around my head, making it very easy to pick out the individual voices.
Sorry about the wall of text but in short, these things are quite amazing and for sound quality I would put them above both the RHA MA750 and the Fidue A73 (which are seen as an upgrade to the VSD3S) - incredible value for £50.
I now want the B150 and the B200 too
(in terms of preferred sound)