Description
The 64 Audio Aspire 4 is a four-driver universal in-ear monitor built for musicians, engineers, and live-audio professionals who need reliable, reference-grade monitoring on stage and in the studio. Its hybrid 1DD+3BA configuration delivers deep bass from a dedicated dynamic driver while three balanced armature drivers handle mids and highs with the clarity that stage work demands. Built with a lightweight molded ABS shell and a stainless steel nozzle, the Aspire 4 stays comfortable through long sets while resisting the wear of constant tip changes.
Key technologies include 64 Audio's Apex Core pressure-relief system for an expansive soundstage, LID (Linear Impedance Design) for consistent interaction with any source, and a custom waveguide on the high-frequency driver for crisp, efficient treble reproduction. The detachable IPX cable with a 90° 3.5mm jack is designed for stage durability and sweat resistance. With -20 dB of isolation, 104 dB sensitivity, and a 20Hz–18kHz frequency response, the Aspire 4 delivers a balanced, musical signature that works equally well as a backup pair or a primary monitor.
Specifications
| Driver Configuration | Hybrid: 1 dynamic driver + 3 balanced armature drivers (1DD+3BA) |
| Frequency Response | 20Hz – 18kHz |
| Impedance | 11Ω @ 1kHz |
| Sensitivity | 104dB @ 1kHz @1mW |
| Isolation | -20 dB |
| Shell Material | Molded ABS Shell |
| Nozzle | Stainless Steel Nozzle (5mm OD) |
| Color | Black |
| Cable | 48" Black Detachable IPX (Estron) Cable, 90° 3.5mm Jack |
| Fit Type | Universal Fit (UIEM) |
| Technology | Apex Core, LID (Linear Impedance Design), Waveguide |
| Included Items | Carry Case, Foam + Silicone Ear Tips, Comply Oval Foam Tips, IPX Cable, Cleaning Tool, 1/4" Adapter, Shirt Clip |
