Bassology Audio

INEARZ Zen 4 Quad-Driver Musician In-Ear Monitors

$599.99


We used ADEL technology that will enhance the way you hear music. This technology adds a second eardrum to our in-ear monitors. This second eardrum takes the punishment of the pneumatic pressure caused by sound in the ear canal and delivers a clear, crisp sound that’s unlike anything you’ve ever heard. And it’s not louder noise coming from your earbuds. The results from the show that using ADEL allows listeners to enjoy Enhanced Loudness Perception (lower volumes sound significantly louder and better over conventional devices). This provides them a louder yet safer, high-fidelity listening experience at significantly reduced power levels (1/4 to 1/16th typical levels) with no perceived loss in volume.

Features:

  • Quad-Synced Premium Balanced Armature Dual Port Drivers
  • Single Bore Design
  • Universal Fit
  • ADEL Technology
  • 3D printed hypoallergenic acrylic shells

Tech Specifications:

  • 2 Low, 1 Mid, 1 High Balanced Armatures
  • FR Range: 20Hz-20kHz
  • 4-Way Crossover
  • Impedance: 28 Ohm @ 1kHz
  • Sensitivity: 113 dB SPL @ 1kHz
  • Noise Isolation: -26dB (+/- 2dB)
  • Input connector: 1/8″ (3.5mm)Stereo Jack

Included:

  1. Standard 2-pin detachable cable
  2. ADEL S1 module
  3. 3 pairs of silicone ear tips (S, M, L)
  4. 3 pairs of foam ear tips (S, M, L)
  5. Cleaning tool
  6. Round hard case
  7. Round soft zippered case
  8. Leather cord keeper
  9. InEarz Audio sticker
  • Premium - Quad-synced Premium balanced armature speakers 48 inches (1.2m) high fidelity stereo cable with gold plated 2-pin connectors and 3.5mm gold plated TRS stereo plug. The headphone's hypoallergenic shell is 3D-printed for exacting performance and ergonomic shaping for a fit that is always as smooth as the sound.
  • Technology - The pinnacle of design and technology has come to Zen. With rich bass, smooth mids, and exhilarating highs, this 4 drivers in-ear system tells a story that has to be heard to believe. Featuring ADEL Technology along with an expertly crafted 4-driver balanced armature module. The universal fit shell comes with a selection of replaceable tips to ensure a comfortable fit that can be personalized. Your ears are punished enough; isn't it time to let them relax in a state of Zen.
  • Fit - The universal fit shell comes with a selection of replaceable tips to ensure a comfortable fit that can be personalized. Your ears are punished enough; isn’t it time to let them relax in a state of Zen. Two types of ear tips in three different sizes ensure that the universal fitting experience is easy and that the earphones are comfortable enough to wear all day or all night.
  • Sound - The Zen 4 fully harnesses its quad drivers in order to deliver breathtaking sound with a very tall, deep soundstage. 4 balanced armatures (2 low, 1 mid, and 1 high) with 4-way crossover create a listening experience that is inviting, soothing, and enveloping. The overall sound signature of the Zen 4 is silky-smooth; all the mids are lush and stress-free. Those seeking a great deal of sparkle may find the treble to be slightly too smooth, without quite enough bite and air to satisfy.
  • Includes - 1 Pair Zen with ADEL S1 Auto Modules. 48 inch (1.2m) high fidelity stereo cable with gold plated 2-pin connectors and 3.5mm gold plated TRS stereo plug. Tip holder/organizer with Small, Medium, Large tips in both silicone and foam. Aluminum, watertight storage case. A canvas carry case w/ carabiner. Leather cord-wrap system and Cleaning tool.
Professional-grade in-ear monitors engineered for musicians and audiophiles. The Zen 4 features four balanced armature drivers (2 low, 1 mid, 1 high) with a 4-way crossover that delivers rich bass, smooth mids, and detailed highs across a full 20Hz-20kHz frequency range. ADEL Technology reduces ear fatigue by managing pneumatic pressure in the ear canal, allowing you to enjoy clear, high-fidelity sound at lower volumes with 113 dB sensitivity and -26dB noise isolation. Universal fit shells with hypoallergenic 3D-printed acrylic accommodate six ear tip options (silicone and foam in S, M, L sizes). Includes premium 48-inch gold-plated stereo cable with 2-pin connectors, hard and soft cases, cleaning tool, and cord keeper.
Free shipping • 3–5 calendar day delivery • Free 30-day returns and exchanges • 24/7 customer support
ShippingFree shipping on every Bassology order.
ReturnsFree returns and exchanges within 30 days.
Support24/7 customer support whenever you need help.
Customer Sound Notes

What listeners love about this product.

Short review-style highlights designed to make the product page feel more trusted, premium, and conversion-ready.

★★★★★
Clean sound and comfortable fit.

The sound feels detailed and easy to enjoy for long sessions, whether it is for music, work, gaming, or focused listening.

Verified Bassology Buyer
★★★★★
Feels premium for daily use.

The build, comfort, and listening experience make it a strong pick for customers who want dependable audio without overcomplicating the setup.

Everyday Audio User
★★★★★
Easy to recommend.

A solid option for anyone upgrading their sound experience with better comfort, stronger clarity, and a cleaner audio routine.

Bassology Sound Pick
Why It Fits Your Setup

Built for modern sound routines.

This section helps customers quickly understand how the product can fit into real everyday audio use.

Everyday Listening Made for music, videos, and personal sound time.

A clean choice for customers who want a smoother listening experience throughout the day.

Work & Focus Supports calls, concentration, and quiet productivity.

Useful for home office routines, study sessions, travel work, and focused listening moments.

Gaming & Media Better immersion for entertainment and gameplay.

Designed to support clearer sound, stronger presence, and more enjoyable media sessions.

Confidence Backed by Bassology customer-care promises.

Enjoy free shipping, 3–5 day delivery, 24/7 support, and free 30-day returns or exchanges.