Almost all Bluetooth speakers or wireless speakers sold in the world are produced in China. More than these speakers, from simple USB speakers to home theatre speakers to large professional speakers used in large concert halls, all types of speakers are outsourced from various manufacturing companies in China.
Speakers with low sound quality are actually a curse on consumers’ ears. Not only does it cause excitement, but it also makes customers hate a song. Therefore, the sound quality of speakers is the most direct demand for buyers, and it is also the most beneficial for sellers to occupy a favourable position in the market; behind all this, quality control in the production process is a very important step for sellers.；
The quality of these speakers could be ensured through inspections and quality control protocols during Pre-production, during production and pre-shipment.
It is necessary for importers to establish effective quality control procedures to ensure the timely delivery of finished products that meet all relevant quality and safety standards. For brands or retailers, active quality control is essential to meet these challenges and optimize supply chain performance.
Different Types of Bluetooth Speakers
Bluetooth Speakers Inspection in Asia
AQI Service provides inspection services for Bluetooth speakers and wireless speakers at every stage: from supplier investigation, audit to the quality control, and final delivery of toilets during the process.
AQI’s quality experts understand the customer’s requirements, ensure that on-site inspections are properly performed on-site, and finalize clear reports to explain and explain all details.
Throughout the quality control process, we will verify the appearance quality, specifications, functions, reliability of your speakers.
During the Pre-shipment inspection, the inspector should find various defects by inspecting the packaging, markings, labels, instruction manuals, accessories, barcodes, functions, and the appearance/appearance of the product.
During the inspection of speakers, we found some common major and minor defects, including but not limited to sharp points, sharp edges, scratches, missing accessories, incorrect barcodes, poor paint, poor assembly, the sound is not balanced, malfunction, Speaker phase reverse, and live electrical parts are exposed, etc.
Why is it important to Arrange Bluetooth Speakers Inspection?
- Identify any issues in product size/specification to save cost and time
- Reduce defects/flaws in the product and maintain a good brand image of the product
- Save on possible rework and product recall costs
- Confirm that the products will not be damaged during packaging and loading
How to Inspect the Bluetooth Speakers?
Before conducting inspections, AQI technical engineers need to understand your product characteristics to determine key risks. By combining our Speakers Inspection Checklist with your unique product specifications and quality requirements, each inspection can be customized.
We will identify and classify defects based on your Acceptance Quality Limits (AQL), verify the quality of mass production, perform product function and reliability tests on-site, and assess your compliance with product specifications and sizes.
Assess the quality of your product materials and workmanship, using a number of quality control checks and tests, including:
|Barcode scanning test
|Instruction manual check
|Fatigue test/Power switch on/off 5 times
|Frequency response test
|Manual Shock test
|Impedance check for speaker
|Perform earth continuity test if applicable
|Hi-pot test if applicable
|Sensitivity test for speaker
|Sound pressure level
|S/N ratio check
|Signal to noise ratio check
|LR channel polarity test
|Rub test and adhesive test
|carton drop test
|Lithium battery charge and discharge tests if applicable
|product’s testing certificates
|AC power plug fixing check
|Input voltage check
Bluetooth Speakers Function Check
- 1. Bluetooth wireless audio playback
- 2. TF card audio playback if applicable
- 3. Hands-free function check if applicable
- 4. Bluetooth compatibility test with various Mobile phone
- 5. Others function according to the client’s spec or instruction manual
Bluetooth Speakers Internal check
All Internal wiring should be routed to provide sufficient creepage and clearance distances and to so as to avoid damage to the insulation. All screws should be found, they should be fully tightened and with no damage to the screw heads. Check that anti-tamper screws are used when required. Request at least one picture to show the whole construction of the product. Compare the components with CDF and list out any difference
Performance and reliability are critical to ensure consumer satisfaction. especially some smart wireless speakers. However, some reliability tests cannot be performed at the inspection site. It requires a specific environment and test equipment to ensure compliance with applicable safety standards and regulatory requirements. AQI Service Inspectors can randomly take samples in production according to customer requirements and forward them to tested by an accredited laboratory.
Quality Control Standards for Speakers
AQI Service adheres only to the most relevant and current international standards in coming up with speaker inspection and quality control procedures used in its operations.
Below are some of the most common standards which are used in the creation of AQI quality control standards and inspection procedures:
|The International Electrotechnical Commission standard IEC 61305 provides performance testing methods for high fidelity speakers.
|This International Electrotechnical Commission standard provides specifications for speakers and speaker systems except those with built-in amplifiers. The British Standards Institute (BS EN 60268-5) and German Institute for Standardization (DIN EN 60268-5) also provide adaptations for this IEC standard.
|IEC 62537-1 /-3 /-4
|This International Electrotechnical Commission standard series deals with various interfaces for speakers accepting digital input signals, including USB speakers.
|This American National Standards Institute standard provides testing procedures on classification, manufacture, and structural design of speakers intended for use in large concert halls and related large public places.
|This Underwriters Laboratories Inc. standard defines the safety requirements for commercial audio devices including speakers and speaker systems using 300 volts or less intended for use in commercial spaces.
|This Consumer Electronics Association Technologies standard defines test methods for the determination of performance and physical measurement of mobile speakers as well as labeling and specifications reporting requirements.
|Underwriters Laboratories, Inc. UL 6500 safety standard applies to household, commercial, and other general use audio and video devices, including speakers.
|ASTM F2617 – 08e1
|The American Society for Testing and Materials International provides ASTM F2617-08 to protect the public from hazardous substances including lead and mercury found in consumer products with plastic parts.