AIAIAI x HIDDEN

Modified on Fri, 27 Mar at 12:30 PM

The AIAIAI x HIDDEN collab had preorders in June 2025 and was officially out in November 2025. Hidden is a well-respected brand within the fashion and music industry. We aim to deliver the highest standards for our customers and therefore greatly appreciate Hidden’s focus on design and quality which correlates specifically to AIAIAI’s values.

TMA-2 HIDDEN Edition

Premium modular Bluetooth headphones with critically acclaimed sound performance from our professional TMA-2 line balancing punchy bass and clear highly detailed representation.

What's included: H84 Headband - HIDDEN, E46 Earpads - HIDDEN, S90 Speaker unit - HIDDEN, C92 Cable - HIDDEN, A80 Pouch - HIDDEN

Parts comparison

If you need to replace a part or want to compare specs, here is how the Hidden parts align with our standard modular products:

Hidden Part	Standard Equivalent	Note
H84 - Headband	H01 - Headband	Slim and lightweight polycarbonate headband with soft, durable PU foam padding
E46 - Earpads	E04 - Earpads	Over-ear, lined with durable PU-leather, high isolation
S90 - Speaker units	S11 - Speaker units	High-end wireless performance
C92 - Cable	C05 - Cable	straight black 1.5m thermo plastic cable with soft touch surface

Connectivity & Compatibility

Full Modularity: The TMA-2 Hidden is fully compatible with all existing TMA-2 parts (Headbands, Earpads, Speakers, and Cables).

Ultra-Low Latency (W+ Link): You can pair these with the X03 Transmitter if you need ultra-low latency.

Note: The X03 Transmitter is a standard AIAIAI accessory and is only available in Black.

Specifications

Driver diameter (mm)	40
Frequency	10Hz -40kHz
Bluetooth version	5.3
Bluetooth playback time (hours)	40
Bluetooth operating range (m)	10
Charging time (hours)	2

UNIT-4 HIDDEN Edition

Portable speaker with studio grade sound. Powerful performance and accurate sound representation. Battery-powered and wireless audio for a cable-free and seamless experience.

What's included: 1x UNIT-4 Wireless+, 1x Custom grill, 1x UNIT-4 Power supply, 1x Protective Pouch

Compatibility

The UNIT-4's are compatible with the X02 transmitter and can when connected to X02 play with a low latency under 16ms.

Note: The X02 Transmitter is a standard AIAIAI accessory and is only available in Black.

If you want extra accessories for your UNIT-4 you can find it here: https://aiaiai.audio/accessories

Specifications

Frequency range	40Hz to 40kHz, -10dB
Frequency response	50Hz - 20kHz ±2dB
Bluetooth version	5.2
Charging time (hours)	3
Power supply	USB-C
EQ adjustment	5-band adjustable EQ via AIAIAI app
Analog input	3.5mm mini-jack stereo + 6.3mm TRS balanced mono

Connecting via Bluetooth

Power on your UNIT-4 by press and holding the middle button
Double press the mode button to enter pairing mode (LED blinking fast)
Find AIAIAI UNIT-4 on your device and connect.