Party Speaker Testing Process

For party speakers designed for high sound pressure, long-term operation, and multi-module integration, the testing process should cover a closed-loop management system from sample reception to report issuance. The core stages include: sample reception and filing-preprocessing and appearance inspection-functional verification-electroacoustic performance testing-electrical safety and EMC-environmental reliability-wireless and protocol testing-aging and consistency testing-result determination and reporting. This process caters to the needs of R&D verification, factory inspection, and third-party compliance testing, and is applicable to various scenarios such as indoor/outdoor parties, commercial events, and professional sound reinforcement.

• China Market Access: Audio-visual and information technology integrated equipment should prioritize safety assessment using GB 4943.1-2022; traditional AV equipment can also refer to GB 8898; for mandatory certification, audio equipment is usually included in the CCC catalog and requires completion of safety and EMC projects before being marketed.
• Export to the EU/UK: The EU conducts safety assessments according to EN 62368-1 (or EN 60065 depending on the product category), and EMC follows EN 55032/EN 55035; the UKCA corresponds to EN 62368-1/EN 60065 and UKCA EMC requirements. 
• Industry and Group Standards: Electroacoustic performance and test methods can refer to SJ/T 11523-2015 (Performance Test Methods for Loudspeakers Used in Line Array Systems), SJ/T 11840-2022 (Technical Specifications for Smart Speakers), QB/T 4327-2012 (Loudspeakers for Keyboard Instruments), QB/T 4328-2012 (Loudspeakers for Electronic Drums), etc., to refine indicator specifications and test conditions.

• Electroacoustic Performance: Frequency response, total harmonic distortion (THD), sensitivity, impedance characteristics, maximum sound pressure level (SPL), directivity, signal-to-noise ratio, sound field uniformity, transient response, etc., are tested in an anechoic/semi-anechoic chamber. Focus is placed on full-frequency flatness, low-frequency extension and distortion control, coverage uniformity, and peak headroom.
• Electrical Safety: Insulation resistance, dielectric strength, leakage current, temperature rise, grounding continuity, electrical clearance and creepage distance, fire protection and material flame retardancy, stability and mechanical hazards, terminals and flexible cords, external wiring terminals, etc., are tested. The judgment criteria are based on the corresponding clauses of GB 4943.1-2022/GB 8898 or EN 62368-1/EN 60065.
• EMC Emission and Immunity: Conducted/radiated emission and electrostatic discharge (ESD), electrical fast transient (EFT), surge, radio frequency field induced conduction, voltage dips and interruptions tests are performed according to the GB/T 17626 series and EN 55032/EN 55035 to ensure that the device does not interfere with surrounding equipment and possesses the necessary immunity.
• Wireless and Protocol: Connection stability, pairing and anti-interference, frequency deviation and transmission power consistency are verified for Bluetooth/UHF/2.4G. If DMX512 or lighting control protocols are integrated, linkage timing and abnormal conditions (disconnection, reconnection) are verified.
• Environmental Reliability: Conduct high/low temperature/constant humidity, vibration, shock, drop, swept-frequency vibration, and packaging and transportation tests to evaluate reliability and appearance/structural integrity under extreme temperature and humidity, mechanical shock, and logistics stress.
• Energy Efficiency and Power Consumption: Measure power consumption, standby power consumption, and efficiency to verify energy consumption limits and thermal safety margins under long-term high load and standby scenarios.

• Near-Field Phase and Frequency Response Consistency: Compare the phase curves and frequency responses of units of the same model at a near-field point approximately 1 m from the loudspeaker to identify phase reversal/wiring errors and perform flattening and crossover optimization for full-range and subwoofer units separately.
• Stereo Sound Image Correction: Set test points on the central axis of the listening area, measure and correct the left and right channel delay differences to ensure the central sound image is stably located on the axis.
• Full-Range and Subwoofer Phase Coupling: Using the nearest full-range and subwoofer as the coupling target, perform phase/delay matching in the main listening area to avoid energy cancellation in common frequency bands and low-frequency decoupling.
• Sound Field Modification and Reverberation Control: Measure and evaluate frequency response uniformity and coherence at multiple points, and combine with room reverberation time (swept-frequency method/pulse method) for EQ adjustments; for strong reflection frequency bands caused by decorative materials, prioritize collaborative treatment through physical sound absorption and system EQ.

• Batch Consistency: Establish a sampling AQL plan for key indicators (such as frequency response, SPL, THD, and impedance), combined with environmental stress screening and long-term full-load aging, to eliminate early failures and improve consistency.
• Automated Regression: Introduce automated detection methods to compare the test audio output of the speaker under test with standard audio files. If the error exceeds the threshold, the sound quality is determined to be abnormal, reducing subjective human differences and improving regression efficiency. 
• Traceability and Reporting: Establish a unique identifier and test data file for each prototype/batch, and issue a test report in accordance with CMA/CNAS requirements. The report includes sample information, test environment, instrument calibration, project results, judgment criteria, and uncertainty (if applicable). Original records and waveforms/logs are preserved for traceability.