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AAW x Custom Art Project 4+2 Hybrid In-Ear Monitor

Cable termination
The Most Sophisticated Hybrid Architecture

AAW and Custom Art teamed up in this unpresented collaboration to design a never-seen-before hybrid architecture featuring FIBEA technology to bring flat impedance and phasing to an isobaric dynamic driver-based system. Furthermore, 4+2 utilizes advanced Nozzle-less Open Vented Armature (NOVATM) Driver coupled with 3 mid-range balanced armature drivers housed in a digitally designed acoustic chamber. 

FIBAE™ Technology

Flat Impedance Balanced Armature Earphone (FIBAE™) technology is the world's first, revolutionary, In-Ear Monitor design providing flat impedance and phase. By changing Balanced Armature driver character from inductive to resistive Custom Art solved one of the oldest problems in the industry – dependence on output impedance of sound source for correct earphone output. With FIBAE™ technology your earphones will always perform best from any DAP.

Nozzle-less Open Vented Armature (NOVA™) Driver

In this hybrid structure, we choose to use a specially designed armature driver with an open front acoustic vent and embedded it deep into the 4+2's 3d printed nozzle. The proximity to the user eardrum eliminates sound pressure decay and any unwanted resonance in a typical tubed balanced armature design.

Dual 8mm Graphene Isobaric Woofer

The 8mm dual isobaric woofer is equipped with dual diaphragms and high strength neodymium magnets. The isobaric design offers reduction in low range THD and higher sound pressure output in comparison to typical dynamic woofers. By further utilizing acoustic filtering technique, it is to only function in minimal overlapping frequency range as opposed to the balanced armature drivers. It pushes the bass performance to a new level in the 4+2 while not overpowering the rest of the spectrum.

BassFlow™ Control

By regulating the amount of air supplied to the dynamic woofer, the BassFlow Control is able to quantitatively and qualitatively dictate texture and response of the bass frequency. The bass can be adjusted to fit the listener’s preference, from the bass-heavy to mid-forward.

3D Printed Enclosure and Precision Engineering

With wholly digitized design process, 4+2 employs AAW 2nd generation digital enclosure and acoustic chamber design. Driver and nozzle placements are simulated hundreds of iterations to determine the ideal phasing and response. It is then 3D printed to precision to maintain consistency in mass production.

Sound Signature

4+2 is tuned with a vigorous and lively sound signature in mind, it offers a natural but hard-hitting sub-bass, which you will never find in a full balanced armature setup. FIBAE mid-woofer driver delivers smooth and precise mids. The dedicated NOVATM driver offers crystal clear details in the upper mid and high range. The treble extension is well controlled to provide a non-fatiguing listening experience. 4+2 delivers expansive headroom, high fidelity with extreme dynamic range and fast transient responses.
Suitable for band performances, performing artists, worship events, audio engineering and anybody who appreciates exceptional listening experience.

Specification
  • Sensitivity: 105dB SPL@1Khz
  • THD<=0.5% @1mW@1Khz
  • Impedance: 8ohm@1Khz
  • Response: 10Hz~40Khz
  • 3D Printed Enclosure
What's in the box
  • Project 4+2 In-Ear Monitor
  • 48" Tiburon OCC Copper Detachable Cable
  • AAW Carrying Case
  • BassFlow™ Control Modules
  • Cleaning Cloth
  • Assorted Ear Tips
  • Owner's Club Card
  • 1 Year Limited Warranty

Customer Reviews

Based on 6 reviews
100%
(6)
0%
(0)
0%
(0)
0%
(0)
0%
(0)
C
CHIH K.Y. (Taoyuan District, TW)
AAW CUSTOM ART PROJECT 4+2

A good product with good work, good tone and high cost.

h
hyeoung g.k. (Uijeongbu-si, KR)
good iem

fantastic!

준호 오. (Gunpo, KR)
Very good

부드러운 저역대
안정적인 고음

A
Anonymous (Seo-gu, KR)
Interesting sound

Bassflow module + NOVA Driver + Isobaric woofer make sound more interesting ever. Headroom stage feature is like sphere, and Bass~Mid area sound is attractive enough.

Y
Yongwook J. (Seoul, KR)
Comfortable sound, with 3 distinctive Bassflow modes

Very good bass of isobaric woofer, and flat mid-high sound feels so comfortable, made me listening music hours without any fatigue or problems.
FIBAE technology make this receiver more useful, just plug in smartphone with 3.5 jack and can listen beautiful sounds. And with nice dac/amp, it’ll make you flying with notes.
Also, Bassflow module is very useful. It makes reasonable change on sound - especially in sub-bass and bass frequency area... anyway on positive side to me. (I love normal/bass mode)
Good receiver for many users wanna experience and feel of Isobaric woofer and Bassflow module. Very pleased and satisfied of this project :)

L
Linda C. (Central, HK)
AAW + Custom

The vocal is clear, the bass is strong, and the sense of space is sufficient. I like to use bass mode. thanks.

Customer Reviews

Based on 6 reviews
100%
(6)
0%
(0)
0%
(0)
0%
(0)
0%
(0)
C
CHIH K.Y. (Taoyuan District, TW)
AAW CUSTOM ART PROJECT 4+2

A good product with good work, good tone and high cost.

h
hyeoung g.k. (Uijeongbu-si, KR)
good iem

fantastic!

준호 오. (Gunpo, KR)
Very good

부드러운 저역대
안정적인 고음

A
Anonymous (Seo-gu, KR)
Interesting sound

Bassflow module + NOVA Driver + Isobaric woofer make sound more interesting ever. Headroom stage feature is like sphere, and Bass~Mid area sound is attractive enough.

Y
Yongwook J. (Seoul, KR)
Comfortable sound, with 3 distinctive Bassflow modes

Very good bass of isobaric woofer, and flat mid-high sound feels so comfortable, made me listening music hours without any fatigue or problems.
FIBAE technology make this receiver more useful, just plug in smartphone with 3.5 jack and can listen beautiful sounds. And with nice dac/amp, it’ll make you flying with notes.
Also, Bassflow module is very useful. It makes reasonable change on sound - especially in sub-bass and bass frequency area... anyway on positive side to me. (I love normal/bass mode)
Good receiver for many users wanna experience and feel of Isobaric woofer and Bassflow module. Very pleased and satisfied of this project :)

L
Linda C. (Central, HK)
AAW + Custom

The vocal is clear, the bass is strong, and the sense of space is sufficient. I like to use bass mode. thanks.