Shipped from Singapore; delivery options and costs shown at checkout Free FedEx Priority over USD 250 Handmade in Singapore since 2008

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

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

AAW x Custom Art Project 4+2 Hybrid In-Ear Monitor, photo 3

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

AAW x Custom Art Project 4+2 Hybrid In-Ear Monitor, photo 5

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

Name: Null Audio
Address: #01-03, LHK2 Building, 76 Playfair Road, Singapore, 367996, SG
Telephone: +65 8731 5476
Price range: $$

¥5,100.00 CNY

AAW x Custom Art Project 4+2 is a universal-fit hybrid in-ear monitor from AAW (Advanced AcousticWerkes) and Custom Art, worn with standard ear tips. It has detachable 0.78 mm 2-pin sockets and comes with our Tiburon cable, with the player plug of your choice.

Two 8 mm graphene woofers in an isobaric pair, three FIBAE mid-range armatures and AAW’s NOVA open-vented armature in a 3D-printed shell, with BassFlow modules to set the bass from bass-heavy to mid-forward.

2 × 8 mm isobaric + 4 armatures
FIBAE flat impedance
BassFlow control
Tiburon cable
2.5 · 3.5 · 4.4 mm

In stockShips from our Singapore studio
14-day returnsUnused, in original packaging · conditions apply
1-year warrantyOn the monitors and the cable · then half price for life
AAW, SingaporeChat and phone support

AAW x Custom Art Project 4+2

Two makers. Six drivers.

Project 4+2 is AAW and Custom Art’s joint answer to the hybrid: four armatures and two isobaric graphene woofers, with Custom Art’s FIBAE technology bringing flat impedance and phase to a dynamic-driven system.

Built for band performances, performing artists, worship events and audio engineering, and for anyone who listens closely.

6 Drivers: 2 × 8 mm isobaric graphene, 3 FIBAE armatures and NOVA
8 Ω Impedance, flat across the band
105 dB Sensitivity
10 Hz – 40 kHz Frequency range

At a glance

The build behind the listen

AAW x Custom Art · FIBAE and isobaric woofers · Tiburon cable

2 × 8 mmIsobaric graphene woofers
3 ×FIBAE mid-range armatures
NOVAOpen-vented armature
BassFlowBass control modules

Key features

Dual 8 mm graphene isobaric woofer
FIBAE flat-impedance armatures by Custom Art
NOVA open-vented armature at the nozzle
BassFlow control modules
3D-printed enclosure, digitally designed

Sensitivity: 105 dB SPL @ 1 kHz
Impedance: 8 Ω @ 1 kHz
Total harmonic distortion: ≤ 0.5% @ 1 mW, 1 kHz
Frequency range: 10 Hz – 40 kHz
Drivers: 6 per side
Connector: 0.78 mm 2-pin

FIBAE

Flat Impedance, From Any Source

Project 4+2 is a collaboration between AAW and Custom Art, and Custom Art brought FIBAE: Flat Impedance Balanced Armature Earphone technology. It turns the armature’s load from inductive to resistive, so the impedance stays flat across the band and the phase stays true.

That frees the monitor from one of the oldest problems in the field, its dependence on the output impedance of the source. Whatever the player, Project 4+2 sounds as it was tuned. Here, FIBAE is brought to an isobaric dynamic system for the first time.

Woofer

Two Diaphragms, One Low End

The bass comes from two 8 mm graphene woofers in an isobaric pair, with high-strength neodymium magnets. Working as one, they lower distortion in the low range and reach a higher sound pressure than a typical dynamic woofer.

Acoustic filtering keeps them to their own band, with little overlap with the armatures, so the low end hits hard without crowding anything above it.

Drivers

Three for the Mids, NOVA for the Air

Three FIBAE mid-range armatures carry the voice, smooth and precise. AAW’s NOVA open-vented armature sits deep in the 3D-printed nozzle, close to your eardrum, which removes the pressure loss and tube resonance of a conventional tubed armature. It carries the upper mids and the treble.

The tuning is vigorous and lively: natural, hard-hitting sub-bass, clear detail up top and a controlled treble that does not tire the ear.

In the box

Tiburon Cable Included

Project 4+2 comes with our Tiburon UPOCC copper cable, 1.2 m long, with 0.78 mm 2-pin connectors. Choose the player plug when you order: 2.5 mm or 4.4 mm balanced, or 3.5 mm single-ended.

BassFlow control modules in the box set how much air reaches the woofers, from bass-heavy to mid-forward.

Compare

Project 4+2 vs Z06

Two AAW hybrids built around a pair of isobaric woofers. Project 4+2 adds Custom Art’s FIBAE armatures and swappable BassFlow modules; Z06 has one fixed voicing with AAW’s Bass-Flow vent.

Project 4+2 vs Z06
Feature	Project 4+2	Z06
Drivers	2 × 8 mm graphene isobaric + 3 FIBAE BA + NOVA	2 × 6 mm isobaric dynamic + 4 BA
Bass	BassFlow modules, bass-heavy to mid-forward	Bass-Flow vent, one voicing
Sensitivity / impedance	105 dB @ 1 kHz / 8 Ω	110 dB @ 1 kHz / 12 Ω
Frequency range	10 Hz – 40 kHz	Same
Cable	Null Audio Tiburon; 2.5, 3.5 or 4.4 mm	Null Audio Epsilon; 2.5, 3.5 or 4.4 mm

In the box

Ready to listen

AAW x Custom Art Project 4+2 in-ear monitors One pair
Null Audio Tiburon cable 1.2 m, 0.78 mm 2-pin
Player plug 2.5, 3.5 or 4.4 mm, chosen at order
AAW carrying case
BassFlow control modules
Ear tips Assorted
Cleaning cloth
Owner’s club card

Specifications

Technical details

Monitor

Type: Universal-fit hybrid in-ear monitor
Drivers: 2 × 8 mm graphene dynamic in an isobaric pair, 3 × FIBAE mid-range armature, NOVA open-vented armature
Bass control: BassFlow control modules, bass-heavy to mid-forward
Sensitivity: 105 dB SPL @ 1 kHz
Impedance: 8 Ω @ 1 kHz
THD: ≤ 0.5% @ 1 mW, 1 kHz
Frequency range: 10 Hz – 40 kHz
Enclosure: 3D-printed; AAW second-generation digital enclosure and acoustic chamber
Connector: 0.78 mm 2-pin, detachable

Cable

Cable: Null Audio Tiburon UPOCC copper, 1.2 m
Player plug: 2.5 mm or 4.4 mm balanced, or 3.5 mm single-ended; chosen at order

Service

Warranty: 1 year, on the monitors and the cable
Returns: 14 days from delivery, unused and in original packaging; 30% restocking fee, shipping not refunded. Defects are covered by the warranty.
Ships from: Singapore

5 stars: 9 (100%)
4 stars: 0 (0%)
3 stars: 0 (0%)
2 stars: 0 (0%)
1 star: 0 (0%)

Excellent IEM

I purchased the Project 4+2 and am very pleased with the IEMs. The audio is natural neither warm or cool. The separation is exceptional. It expands into the existing surround sound by allowing sounds to be interpreted as three-dimensional with neither horizontal, nor vertical limitation.
It comes with 3 sound customizable sound filters (normal, Vokal, and bass)
The bass is powerful but not overwhelming nor does interfere with the mids or vocals. It completes the audio making the audio sound full without fatiguing your senses.
This IEM produces accurate sound allowing the audio/music to be heard as the producer intended. If you want an accurate IEM this is the IEM to go with.

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 :)

Good Sound

BassFlowControl is very useful. It's good to be able to try different things so that you don't get bored with the sound.

Good iem

Very good sound deep bass I like it IEM

AAW CUSTOM ART PROJECT 4+2

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

good iem

fantastic!

Very good

부드러운 저역대
안정적인 고음

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.

AAW + Custom

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

If Later on I would like to get another pair Project 4+2 again, can I get them with my custom ear mold and/ or reshell?

Null Audio

Yes, please quote your previous order number so we can look up the impression files

I purchased a pair of AAW x Custom Art Project 4+2 IEMs, could you let me know which brand and model the foam tips are? I wish to order replacements

Thanks

Null Audio

earphone nozzle is 5.5mm. any 3rd party tips accommodating this size will fit~

When is expected delivery time of project 4+2?

Null Audio

re-stocking now, new stock to arrive next week.

Questions

Good to know

What do the BassFlow modules do?

They regulate how much air reaches the dynamic woofers, which changes both the amount and the texture of the bass. Swap them to move Project 4+2 from bass-heavy towards mid-forward.

What is the driver configuration?

Six drivers, which give the name its 4+2: two 8 mm graphene woofers in an isobaric pair, three FIBAE mid-range armatures and AAW’s NOVA open-vented armature for the upper mids and treble.

Who is Project 4+2 for?

Bands and performing artists, worship teams and audio engineers, and anyone who wants a hard-hitting low end with clean mids and an easy treble. With FIBAE it sounds the same from any player, whatever its output impedance.

Which cable fits Project 4+2?

Project 4+2 has 0.78 mm 2-pin sockets. Choose Standard 2-pin (0.78 mm) on any of our cables; see the AAW cable guide.

What warranty and returns apply?

Project 4+2 has a 1-year warranty on the monitors and the cable. Unused universal IEMs in their original packaging can be returned within 14 days of confirmed delivery, with a 30% restocking fee. See shipping and returns.

Do you ship worldwide?

Yes. Most countries get free shipping by EPAC, and FedEx Priority is free on orders of USD 250 or more. In Singapore you can also pick up from our studio at 76 Playfair Road.

Next in the chain