64 Audio Aspire 4 In-Ear Monitors For Stage Performance  

Next-Generation Performance Monitoring

Monitor your performance with 64 Audio's next-generation universal in-ear monitors (UIEM) specifically designed for musicians and live music professionals. Whether you're just getting into monitoring with in-ears, not ready for customs, need a backup set, or simply prefer generic fitting products, the Aspire 4 offers best-in-class sound and ergonomics.

Unparalleled Sound Quality

With live music at the forefront of our tuning criteria, we aimed for a balanced sound profile that sits between a highly accurate studio monitor and a contoured device for effective self-monitoring. Aspire 4 features huge bass capable of reproducing some of the toughest frequencies with ease, forward mids for clear articulation, and a top-end sparkle that sets it apart from other UIEMs in its class. This powerful sound signature is a perfect blend of accuracy and musicality.

Proven Professional Heritage

Since 2010, we've crafted thousands of custom in-ear monitors for some of the world's greatest musical talents. This experience has shaped our products and technological advancements, leading to the creation of our most accessible UIEM to date. Sharing the same legendary DNA and patented technology, the Aspire 4 allows anyone to hear like a pro.

Innovative Technologies

• Stainless Steel Nozzle: Our stainless steel nozzle, paired with the molded ABS shell, ensures durability for consistent use and ear tip removal. The flange design and mesh grill prevent ear tips from falling off and keep the sound bore free of debris.

• Apex Core: Our patented pressure-relieving technology, integrated seamlessly into the earphone body, uses acoustic filters instead of pneumatically interactive foam to provide a controlled leak.

• Wave Guide: This custom-designed acoustic structure, integrated into the high-frequency balanced armature driver, increases efficiency by directing and focusing energy for crisp and clear sound.

• LID (Linear Impedance Design): This proprietary circuit corrects the non-linear impedances of the drivers, ensuring proper interaction with the source and preserving the desired sound signature.

Frequently Asked Questions

• How is Aspire 4 different from your other custom and universal models? Aspire 4 is not custom fitting and uses foam or rubber ear tips provided with the UIEMs. Unlike other models like U4s and Fourté, Aspire 4 has an ABS molded shell and stainless steel tip, and uses an IPX (T2) socket instead of a 2-pin socket. It does not feature tia™ technology but incorporates a unique waveguide for high frequencies.

• How does Aspire 4 differ from other four-driver models like U4s and Fourté? Aspire 4 features a 3-way crossover (lows, mids, highs) compared to the 4-way crossover in other models. It uses a revolutionary waveguide for the highs and is specifically designed and tuned for musicians and live-audio professionals.

• What does “Hybrid” mean? Hybrid refers to the use of multiple types of drivers: balanced armature drivers for mids and highs, and a single dynamic driver for lows.

• How does apex core differ from apex™ tech? Apex core achieves pressure relief using different internal structures and materials compared to standard apex tech. It is built into the earphones rather than being an interchangeable module.

• Can I use third-party tips with Aspire 4? Yes, any tips with a 5mm nozzle diameter will fit.

• If the cable fails, do I need to send the whole unit for repair? No, the cable is detachable, and you can purchase a new one from our website or any genuine estron IPX (T2) parts supplier.

• Why do I need to adjust the volume when switching to Aspire 4? Different IEM models have varying sensitivity specs, so adjusting the volume is normal and not an indication of quality or volume capacity.

• Where is Aspire 4 made? Aspire Products are designed, packaged, and quality checked by skilled technicians in the United States and assembled in China using globally sourced components.