
TOP-SELL UPGRADEDPOCKET-SIZED HI-FITREASURE
Dual chip luxury configuration
Massive power Enjoy HIFI
5-axis CNC precision hardware
Suitable for differentmodels"earphone
LOW SNR high output
448 coils luxury silver-plated wire
PATENT APPEARANCEDESIGN
ENTHUSIAST-GRADE SETUP:
HIGH-RESOLUTION AUDIO &POWERFUL DECODING
WIDELY COMPATIBLE:TYPE-C CONNECPORS DEVICE
PREMIUM MATERIALS:
PRECISION-MACHINED
ALUMINUM MABLASTED
AGDTZED FINISH
LUXURIOUS WIRE:
SILVER COOPER 8 CORE 448 COILS
DUAL-CHIP ARCHITECTURE REFERENCE-CLASS HI-FI PERFORMANCE
JM7MAX utilizes the Conexant Cx31993 DAC chip, supporting PCM sampling ratesup to 32-bit/384kHz. Powerfully equipped with the SGM8262 amplifier chip, itdelivers exceptional driving capability for high-resolution audio reproduction.Experience authoritative low-end response and enhanced vocal clarity. Forrecording, a high-definition ADC chip supports 24-bit/96kHz capture.Comprehensive functionalityincludes music playback, inline controls,voice calling, and live broadcasting
HIGH-PERFORMANCE CIRCUIT ARCHITECTUREPORTABLE DAC/AMP DRIVING FORCE ASSURANCE
CIRCUIT-SOUND SYNERGY: SUPERIOR PCB ENGINEERING DIRECTLYGOVERNS A PORTABLE DAC/AMP'S SONIC PERFORMANCE. JM7MAX'SHI-FI CIRCUITRY ENSURES PRECISION CLOCKING AND HIGH-CURRENTDRIVE, DELIVERING FLAGSHIP-GRADE DYNAMICS WITH FOCUSEDTRANSIENT RESPONSE.
JM7MAX COMPARE TO OTHER`S BRANDCORE COMPARISON TABLE
Superior SNR PerformancePristine Sonic Canvaswith Refined Micro-Detail
SNR (SIGNAL-TO-NOISE RATIO) MEASURES THE RATIO BETWEEN USEFUL AUDIOSIGNALS AND INHERENT DEVICE NOISE IN THE OUTPUT. THIS CRITICAL METRICDETERMINES A PORTABLE DAC/AMP'S BACKGROUND BLACKNESS AND DETAILRETRIEVAL CAPABILITY, HIGHER VALUES INDICATE GREATER USEFUL SIGNALDOMINANCE OVER NOISE, RESULTING IN: TRANSLUCENT BACKGROUND PURITY,ENHANCED MICRO-DYNAMIC ARTICULATION. TEXTURALLY NUANCED SOUNDREPRODUCTION.
Ultra-Low Noise Floor : Acoustic Cornerstoneof Pristine Aural Perception
NOISE FLOOR REFERS TO THE AGGREGATE SELF-NOISE GENERATED BY A DAC/AMPDURING OPERATION (UNDER NO-SIGNAL OR LOW-LEVELINPUT CONDITIONS),ENCOMPASSING: COMPONENT INHERENT NOISE (SEMICONDUCTOR SHOT/THERMAL NOISE). DESIGN-INDUCED NOISE (PCB LAYOUT IMPERFECTIONS)EXTERNALINTERFERENCE LEAKAGE. LOWER NOISE FLOOR DIRECTLYCORRELATES WITH SUPERIOR SONIC PURITY.
Superior THD+N PerformanceThe Benchmark Metric for SonicPurity & Signal Fidelity
THD+N (TOTAL HARMONIC DISTORTION PLUS NOISE) QUANTIFIES THE COMBINEDRATIO OF HARMONIC DISTORTION AND NOISE RELATIVE TO THE ORIGINAL SIGNALTHIS CRITICAL PARAMETER MEASURES A PORTABLE DAC/AMP'S RESOLUTIONACCURACY AND BACKDROP BLACKNESS. LOWER VALUES INDICATE REDUCEDSIGNAL CORRUPTION AND NOISE INTRUSION, DELIVERING PURER SOUNDREPRODUCTION AND HIGHER SIGNAL AUTHENTICITY.
Crosstalk suppression:The Fundamental Safeguard for ChannelIsolation & Spatial Layering
IDEALLY, LEFT AND RIGHT AUDIO CHANNELS SHOULD OPERATE INDEPENDENTLYWITHOUT MUTUAL INTERFERENCE. HOWEVER, CIRCUIT DESIGN CONSTRAINTSAND COMPONENT LAYOUT LIMITATIONS CAN CAUSE SIGNAL LEAKAGE BETWEENCHANNELS. CROSSTALK QUANTIFIES INTER-CHANNEL ISOLATION INTEGRITY -LOWER VALUES INDICATE: MINIMIZED CHANNEL INTERFERENCE. PRECISESOUNDSTAGE POSITIONING. DEFINED SPATIAL HIERARCHY.ENABLINGACCURATE INSTRUMENT LOCALIZATION AND LAYERED ACOUSTICIMAGING.
Dynamic Range (DR): Enabling SonicStratification & Authentic Reproduction
DYNAMIC RANGE MEASURES THE RATIO BETWEEN A PORTABLE DAC/AMP'SMAXIMUM UNDISTORTED OUTPUT AND ITS MINIMUM DISCERNIBLE SIGNAL LEVELGREATER DR EMPOWERS THE DEVICE TO: RESOLVE MICRO-DETAILS (E.G.INSTRUMENT HARMONICS, VOCAL BREATHS) WITH CLARITY. MAINTAINDISTORTION-FREE REPRODUCTION DURING MACRO-DYNAMICS (E.G. DRUMIMPACTS, CHORAL CLIMAXES). DELIVER NATURAL INTENSITY GRADATIONS,ACHIEVING UNALTERED STUDIO MASTER AUTHENTICITY.
Low-lmpedance OptimizationAmplification Prowess Fully Realized
OUTPUT IMPEDANCE UNDER 32Ω LOAD (I.E., THE INTERNAL CIRCUIT IMPEDANCEAT THE OUTPUT TERMINAL OF THE DONGLE DAC/AMP) IS A KEY METRIC FOREVALUATING HEADPHONE AMPLIFIER COMPATIBILITY.A LOWER VALUE (≤1QISCONSIDERED EXCELLENT INDUSTRY-WIDE) ENABLES BROADER HEADPHONECOMPATIBILITY AND MORE STABLE AUDIO PERFORMANCE. INDUSTRY STANDARDRECOMMENDATION: AMPLIFIER OUTPUT IMPEDANCE ≤ 1/8 OF HEADPHONEIMPEDANCE
SINAD: Signal-to-Noise and Distortion RatioThe Key to Pure Audio Output
SINAD is the ratio of the useful signal (a standard lkHz sine wave) tothe sum ofnoise (such as circuit noise floor) and distortion signals(such as harmonic distortion,intermodulation distortion, etc.). lt isa critical metric for assessing the purity ofthe output signal fromDAC dongles. The higher the SINAD value, the greater the proportionof the useful signal, and the less noise and distortion-resulting incleaner sound quality and higher fidelity.
SINAD: Signal-to-Noise and Distortion RatioThe Key to Pure Audio Output
OUTPUT POWER IS A CORE PARAMETER MEASURING THE DRIVING CAPABILITY OFA DAC DONGLE. IT REFERS TO THE EFFECTIVE OUTPUT POWER DELIVERED WHENDRIVING HEADPHONES OF DIFFERENT IMPEDANCES (SUCH AS 16Ω,320, OR 300Q)THIS METRIC DIRECTLY REFLECTS THE DONGLE'S DRIVE COMPATIBILITYWITHVARIOUS HEADPHONE IMPEDANCES, PROVIDING CRITICAL REFERENCE FORMATCHING EOUIPMENT WITH HEADPHONES.
WIDELY COMPATIBLEWITH MANY DEVICES
JM7MAX supports high sampling rate formats up to 32-bit/384kHz. it is compatiblewith:Android/i0s devices via Type-C ports (phones/tablets).MacOS/Windows 10(or later) computers supporting the UAC 2.0 communication protocol.lt is not compatible with devices using UAC 1.0, such as: Switch,PS5 consoles,windows 7 computers
PRODUCT SPECIFICATION
NAME VISUAL HIFI PORTABLE AMPLIFIER
MODE JM7MAX
MAIN CHIP CONEXANT CX31993
ОPAMPCHIP SGM8262
PCM RATE 32bits/384KHz ADC RATE 24bits/96KHz
SNR≈115dB(320,A-wt.) DNR≈103dB(32Ω)
CROSSTALK≈-76dB(32Ω)
THD-N≈0.0025%(32Ω) ≈0.0025%(300Ω)
NOISE LEVEL:3.5 PO≈2.5uV(32Ω, A-wt.)
OUTPUT IMPEDANCE ≈0.50(32Ω) OUTPUT POWER ≈228mW(16Ω/THD+N<1%) ≈118mW(32Ω/THD+N<1%) ≈13mW(300Ω/THD+N<1%)
APPLIANCEFUNCTIONSUPPORT
Plug and play support game、music、live streamingSUPPORTphone call、microphone、recording etc
APPLIANCE
Compatible with:Android/i0s devices via Type-C ports (phonesitablets). MacOS/Windows 10 (orlater) computers supporting theAPPLIANCEJAC 2.0 communication protocol,not compatible with devicesusing UAC 1.0, such as: Switch,PS5 consoles,windows 7 computer
WIRE MATERIAL
8 core silver cooper 448 coils, spiral design
SHELL METWEIGHT
Aluminum alloy five-axis CNC curved surface precision engraving anodized matte silver finish with 180-mesh fine sanding
COLOUR Matte silver
DIMENSION 115士10mm
GROSS WEIGHT 47g士5g