Heaven IV

BAM air control mechanism has been developed further, and a small, simpler product has been achieved. Comprehensively reproduces the vivid atmosphere of live music.

Our special BAM (Balancing Air Movement) Mechanism, which optimizes air movement inside the housing, has pushed the evolution of earphone body design to the next level with a simpler structure and slimmer body. The result is a balanced, natural sound that reduces unwanted sibilant high-frequency sounds. The heaven Ⅳ delivers deep spatial expression and a true "live sound" atmosphere.

AWARD

Hi-Fi Choice,
RECOMMENDED
2014, UK

AVForums
Best Headphones of 2013
2013, UK

AVForums
HIGHLY RECOMMENDED
2013, UK

Hi-Fi Choice,
RECOMMENDED
2014, UK

AVForums
Best Headphones of 2013
2013, UK

AVForums
HIGHLY RECOMMENDED
2013, UK

BAM mechanism produces bass sounds and stereo spatial interpretations

With balanced armature driver units, iron is driven to produce sound, and as such, these drivers face a number of problems, amongst which are "proving tiring to listen to", "having sound that is subtle and beautiful, but lacking in depth and being flat" and "lacking bass interval". At final, we decided to focus on developing technology for the reproduction of bass tones and three-dimensional space with the full-range reproduction of a theoretically unproblematic single driver unit, rather than taking things in a multiway direction. We went back to the beginning and reviewed the performance of the balanced armature driver, focusing our attention on something we had previously overlooked ? airflow inside the housing. We developed BAM (Balancing Air Movement), a mechanism that optimizes airflow inside the housing through the creation of an aperture in the driver unit, which is usually sealed.

While achieving bass tones and deep, three-dimensional spatial representation, which proved difficult with single driver full-range reproduction, we achieved a BA type that at the same time made for natural listening the user doesn't tire of.

An original balanced armature driver unit with an aperture that is optimized for the BAM mechanism.

Using BAM, which optimizes airflow in the housing, this driver unit has been developed to our own specifications and has an aperture arranged on the back of the driver unit, which is usually sealed.

A highly rigid stainless steel housing machined with the utmost precision for a new BAM type

The housing, which has been machined from stainless steel, appears simple at first. But the inside has been precision machined. To achieve the new BAM mechanism, it was necessary that the precision with which the housing was machined be higher than usual. This paid off; it was possible to make the internal structure simpler than it was previously, and the effect of the new BAM has been shown across all bands. We succeeded in suppressing the bracing high tones typical of balanced armature types without sacrificing clarity. The sound quality, with its three-dimensional spatial representation and sense of speed is the same as before, and a natural sound quality you don't tire of listening to has also been achieved.

Original ear pieces available in five sizes

Three types of ear pieces come with the product. The new E type employs two types of silicon differing in hardness for the sound conduit section and the section that comes into contact with the user's ear. Compared to the section that comes into contact with the user's ear, the sound conduit section utilizes a harder silicon with grooves in it, so as to combine strength with flexibility. Can be fitted into the user's ear while maintaining its round shape. For the section that comes into contact with the user's ear, soft silicon has been employed, making for a comfortable fit and a high level of sound insulation. Joining the E type and the five sizes it comes in ? SS/S/M/L/LL ? are the A type and the B type, which differ in terms of how airtight they are and in terms of bass reproduction (come in three sizes). Please choose the size and type that is right for you.

An original cable that suppresses touch noise

Compared to previous cables, this is more flexible. An original, flexible cable that suppresses touch noise.

BAM aperture that reduces sound leakage and dispenses with the need for an aperture on the back face.

Color variation

VIOLET, WHITE, BLACK, three color variations

Specifications

Product code: FI-HE4BVI3 / FI-HE4BWH3 / FI-HE4BBL3

Housing: Machined stainless steel

Driver: Balanced armature

Sensitivity: 112dB

Impedance: 16Ω

Weight: 16g

Cord length: 1.2ｍ

Accessories

Steel carry case, Silicon ear pieces (E type 5 sizes, A and B types 3 sizes each)

How to wear the earphones

Please check the L (left) and R (right) indicators at the back of the left and right housings. Holding the product, fit into the ears using a slight twisting motion. Since sound quality differs greatly according to the positioning of the ear piece, move each ear phone around while playing music until you find the position with the balance that suits you best. Once you have experienced this position, it will be easier to find subsequently.
* The L (left) bush has a left and right identification protuberance, so that it is possible to distinguish between left and right in the dark by feel.
* It is usual that a person's ears differ in shape from left to right. As such, the optimum positioning of the product differs from left to right.

Sound quality reviews

Easy-listening clarity with few idiosyncrasies charaterize this model. These earphones produce beautiful softly lingering high frequencies and congenial vocals close in proximity with an easily transmitted ambience. Since these earphones produce honest sound and are suited to all music, we encourage you to listen to a variety of music sources with them.

User reviews

These earphones are the first final earphones that I have bought.
I'm completely satisfied in terms of sound quality. I don't really care for high frequency burr and so tended to shy away a bit from BA types, but there's no high frequency burr with these earphones, and they play middle and low frequencies nicely.
Being a single BA, the sound field is kind of narrow, but they have a very natural sound and so I think they would work with pretty much any genre.
The touch noise is really bad, so if you're going to use them outside, you'll definitely need to do something about it.
This is a gem of a product that I would recommend even for those who don't care for BA types.

（male, -）

I listen to anime songs, pop music, band music and hard core.
To start, it goes without saying that the range above the middle range production was fantastic, as is characteristic of BA types. What surprised me even more was the strength of the low ranges.
Usually BA type earphones are not that good with low ranges, but that's not the case with these – they really surprised me.
Vocals also have reach, and since the balance from bass to high frequencies is extremely good, it is extremely enjoyable to listen to music with them.
Personally, these are earphones that I would really recommend.

（male, 20-29 years）

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