Brainwavz M4 IEM Review
Got my BRAINWAVZ M4 sample unit in. Initial impressions are very good. These are the same as the production units, but the hole in the back of the housings are different, as well as the band on these are a bit wider. As samples, I got the M4's, case, and Comply tips as extras. These are the non mic version.Specs:
* Transducers/Drivers: Dynamic, 10mm
* Rated Impedance: 16ohms Closed Dynamic
* Sensitivity: 101dB at 1mW
* Frequency range: 20 ~ 20000Hz
* Distortion: <= 0.3% @ 94dB
* Channel balance: =< 3dB (at 1000Hz)
* Rated input power: 4mW
* Maximum input power: 20mW
* Plug: 3.5 mm gold plated, L Shape
* Cable length: 1.2 meters Y cord
* 1 year warranty
* Dimensions (Packaging): 160 x 135 x 38mm
* Net Weight: 10g
* Gross Weight: 132gAccessories:
These will come with the M4 production units:
* 1 x Comply foam tips
* 3 x Pairs of ear tips (S/M/L)
* 1 x Shirt clip
* 1 x Hard carrying case
* 1 x Instruction manual
* 1 x Warranty cardBuild Quality:
Very nicely constructed. The vented housings, and the nozzles appear to be machined aluminum, painted, or perhaps anodized black. The "R" and "L" markings are nice and bright. I can't tell if the cable coating is transparent, or if it's just made that color/design, but it feels very durable. There are strain reliefs in place. The cables are Y cord, and cinched.Comfort And Isolation:
I have only used the silicone tips thus far, but they fit in my ears perfectly, with a nice tight seal, and are very comfortable.Sound:
I'll be pairing this up with my ROCKboxed Clip+. I listen to this player daily at work, and is my most used player, and the one I'm most accustomed to listening to. This is initial listening, with no burn in time. I will update as I go.
I'll be listening to various artists, genres, and am using mp3 files.
Microphonics are definitely present if you wear them straight down, as with many Y cords above the cinch, but is easily remedied by slinging the cords over the ear.
The M4's carry a wide soundstage, and possess a very natural sound. There's good separation, with consistent detail. Spectral balance is good.
I like the bass right off the bat. It's fast, more punchy than boomy, and not over powering, yet still impactful, with no bleed over into the mids.
The mids and highs have good clarity and detail, with good response. I like the balance they carry. These are bright, but not not B2 bright. I haven't had any harshness or sibilance issues with these at all. I do notice that these have better detail at moderate volume levels, as opposed to higher levels. This is not a problem for me, as I listen to my music at moderate levels.
For those more familiar with the BRAINWAVZ family, it's as if the M1's and B2's merged, and their offspring is the M4's, carrying over some of the M2's genetics. Detailed like the M1's, yet more analytical like the B2's, and possessing some
of the M2's bass.Update 1 - Burn In:
Have logged around 25-30 hours on these now. (Sorry I didn't keep exact time) I do believe these benefit from a little burn in time. Though the highs are still bright, they seem to have relaxed a bit. The bass has smoothed out a bit as well. I would like to point out as well that like the B2's, the M4's don't tolerate crap files. I checked the file size on some of the songs that sounded a bit brighter, especially with the high hats, and indeed they were lower bitrate files.
I normally listen to rock music, but I must say I have really enjoyed some of the acousticals in the country music. It's crystal clear. Very clean sounding.
I will keep updating. I will include if I feel there's any difference with the Comply tips, and also about amping.Update 2 - Amping:
Plugged the E11 into the Clip+ with the M4's. It definitely smooths the sound out. The bass get's slightly
more boomy than punchy, warming up a bit. The highs are slightly
less detailed with amping, but they smooth out, and are less bright.Update 3 - Comply Tips:
Tried the Comply tips tonight. To start with, I'm personally not a fan of the Comply tips. They're okay at first, but hurt my ears after extended listening. (Personal opinion) Perhaps I'm not using the right size, but as samples, I only got one size with them.
Sound wise, they seem to muffle the sound slightly to me. It does tame the highs somewhat, but over all, I feel the sound sounds more contained. Like it's closed in more. Not as detailed, and it's as if some sounds cut off faster, if that makes sense. Perhaps decay is the word I'm looking for. I got the best possible seal I could with them. (d2k came up with a plausible explanation HERE
Overall sonic traitsCons:May
be too bright for some
Loses detail at louder volumes
L-Shaped plug (personal preference)Conclusion:
I received these just a few days ago, and have only been able to listen to them for around 10 hours, but am very impressed. I like detailed IEM's, and the M4's deliver. From the detailed and analytical mids and highs, to the impactful bass, these have been a pleasure to listen to. Out of the entire BRAINWAVZ line up, the M1's have always been my favorite, until now. It'll be hard to put these down. I believe the M4's to be the most accurate and natural sounding of the entire BRAINWAVZ line up.Other Reviews/Impressions At MP4Nation:
.Other Reviews/Impressions Elsewhere: