JCALLY JM7MAX
Visual HiFi Portable DAC/Amp — Dual-Chip, Ultra-Low Noise
- Conexant CX31993 DAC Chip + SGM8262 Op-Amp
- Supports PCM up to 32-bit/384kHz
- SNR ~115dB, Noise Floor ~2.5µV
- Output Power ~118mW @ 32Ω
- 8-Core 448-Strand Silver-Copper Hybrid Cable
- 5-Axis CNC Aluminum Alloy Housing
- Plug-and-Play for Type-C Devices
JCALLY JM7MAX
Dual-Chip Hi-Fi Performance
The JM7MAX combines the Conexant CX31993 DAC chip with the SGM8262 amplifier chip, supporting PCM decoding up to 32-bit/384kHz. This configuration delivers authoritative low-end response, clear vocal reproduction, and faithful high-resolution audio playback. A dedicated high-definition ADC chip enables 24-bit/96kHz recording, making the JM7MAX suitable for music, calls, live streaming, and microphone input.
Ultra-Low Noise and High Signal Purity
With a signal-to-noise ratio of ~115dB (32Ω, A-weighted) and an ultra-low noise floor of ~2.5µV, the JM7MAX achieves a pitch-black background that reveals micro-details without audible hiss. Total harmonic distortion plus noise is measured at ~0.0025% @ 32Ω, preserving the integrity and transparency of the original signal. Channel crosstalk reaches ~-76dB @ 32Ω, ensuring precise stereo separation.
Powerful Output and Broad Compatibility
The JM7MAX delivers ~118mW of output power @ 32Ω (THD+N <1%) with an output impedance of ~0.5Ω, allowing it to drive both low-impedance high-sensitivity earphones and higher-impedance monitors with ease. It supports plug-and-play operation with Android and iOS devices via Type-C, as well as macOS and Windows 10 or later computers that support the UAC 2.0 protocol. (Note: Not compatible with UAC 1.0 devices such as Nintendo Switch, PS5, or Windows 7 PCs.)
Premium Build and Silver-Copper Hybrid Cable
The housing is precision-machined from aluminum alloy using 5-axis CNC engraving, finished with a fine-blasted and anodized matte silver surface for durability and a premium feel. The included 8-core, 448-strand silver-plated copper hybrid cable minimizes dielectric loss and jitter, preserving square wave signal integrity during digital transmission for authentic, detailed sound reproduction.
Visual HiFi Design and Refined Packaging
The JM7MAX embodies a "Visual HiFi" design philosophy, where a transparent window reveals the dual-chip architecture inside, blending technical precision with aesthetic intent. The exclusive packaging features a custom insert that securely cradles the device, preventing movement during transit. A tightly wrapped protective structure guards against scratches and wear, ensuring damage-free delivery from the moment you open the box.
Technical Details
- JM7MAX Unit ×1
- Protective Cover ×1
- USB Adapter ×1
- Warranty Card ×1,
- Dust-proof Liner Paper ×1
- User Manual ×1
