ACOUSTIC ENGINEERING · SINCE 1958
Slim by Design.
Full of Sound.
Acoustic solutions for AI glasses, ultra-slim TVs, monitors, speakers and laptops. Ultra-slim design, high sensitivity, low F0 and full-range performance bring rich sound to lightweight wearables and compact devices.
R&D and DesignPrecision ManufacturingSystem Solutions
Dual-Driver Speaker · Exploded ViewWOOFER + TWEETER
38,000㎡
Total Site Area
1million / month
Monthly Speaker Capacity
500+
Employees
300+
Speaker Products
06 / CERTIFICATIONS
Certifications
Our certifications cover automotive quality, environmental and occupational health and safety management, and hazardous substance process management. Consistent standards across R&D, production and inspection support product quality, process traceability and reliable volume delivery.
ISO 9001
ISO 14001
ISO 45001
QC 080000
UL VZQC2
01 / ABOUT YONGTUO
Expertise behind every soundRooted in Audio.
Built for the Future.
Founded in 2019, Anhui Yongtuo Audio Co., Ltd. acquired Nanjing Yongtuo Audio Co., Ltd., a company established by Nanjing Electroacoustic, in the same year. Our industry heritage dates back to Nanjing Radio Components Factory No. 2, founded in 1958. Based in Tianchang, Anhui, we integrate R&D, manufacturing and sales to deliver complete solutions from acoustic drivers to systems.
Our business spans speaker drivers, speaker systems, automotive speakers and AI glasses speakers, alongside voice coil production, tooling and plastic injection molding—bringing design and manufacturing together.
Company Profile ↗
OUR HERITAGE
From Nanjing to Yongtuo
A Legacy in Audio Manufacturing
Industry heritage since 1958
Anhui Yongtuo established in 2019
- 1958
The Beginning
Nanjing Radio Components Factory No. 2 was established, marking the start of our audio manufacturing heritage.
- 1980
Industry Consolidation
Three companies merged to form Nanjing Electroacoustic Equipment Factory.
- 1984
University Collaboration
A joint industry–university research base was established with Nanjing University.
- 1994
Corporate Restructuring
The business became Nanjing Electroacoustic Co., Ltd., a joint-stock company.
- 1997
Nanjing Yongtuo Founded
Nanjing Electroacoustic established Nanjing Yongtuo Audio as a subsidiary.
- 2019
A New Chapter
Anhui Yongtuo Audio Co., Ltd. was established and acquired Nanjing Yongtuo Audio in the same year.
OUR CUSTOMERS
Our Customers
Working with industry partners to explore the value of sound.
ORGANIZATION
Our Organization
Coordinated teams connecting R&D, manufacturing and service.
REPRESENTATIVE SPEAKER SOLUTIONS
Speaker Portfolio
Hundreds of speaker designs for a wide range of devices and acoustic requirements.
02.1 / ACOUSTIC SOLUTIONS
Acoustic Solutions
AI & SMART WEARABLES
AI & Smart Wearables
Miniature speaker designs for AI glasses, smart wearables and lightweight devices, balancing compact size, clear speech and comfortable wear.
TV & SOUNDBAR
TV & Home Audio
Full-range performance, bass extension and high sensitivity for ultra-slim TVs, compact enclosures, soundbars and home theater systems.
MONITOR & ALL-IN-ONE
Monitors & All-in-One PCs
Ultra-slim, compact speaker modules fit limited internal space while supporting clear voices and near-field listening.
AUTOMOTIVE AUDIO
Automotive Audio
From tweeters and door woofers to surround channels, we provide multi-driver configurations and tuning support for vehicle interiors.
NOTEBOOK SPEAKERS
Laptops
Miniature full-range speakers for slim laptop enclosures, balancing size, power handling and near-field sound.
PROFESSIONAL AUDIO
Professional Audio
Woofer, coaxial and compression-driver solutions for high sound pressure levels and wide dynamic range.
03 / MANUFACTURING SOLUTIONS
Manufacturing Solutions
TOOLING
Tooling Design & Manufacturing
From structural assessment and mold-flow analysis to precision machining, we provide reliable tooling for speakers and acoustic components.
VOICE COIL
Voice Coil Design & Production
Round, oval and custom voice coils, with materials and process control tailored to different speaker drivers.
INJECTION MOLDING
Injection Molding
Precision injection molding and automated workstations support dimensional consistency for speaker baskets, enclosures and plastic components.
04 / ENGINEERING & MANUFACTURING
Turning Design into Quality
From Simulation
to Validation
Professional R&D facilities and systematic testing support product design, sample validation and volume manufacturing.
01
Acoustic R&D & Simulation
CLIO, SoundCheck and Klippel RD audio test systems, combined with magnetic and acoustic simulation tools, support design validation.
02
In-Line Production Testing
Automated and manual assembly work together, with listening rooms and SoundCheck in-line testing on every production line.
03
Reliability & Quality Validation
High- and low-temperature, power, vibration, drop and salt-spray testing, alongside SPL, impedance and distortion measurements.
ASSEMBLY
Volume Assembly
Eight manual assembly lines, supported by automated component assembly.
TOOLING
Tooling Design & Machining
From DFM assessment and mold-flow analysis to tooling design and manufacturing.
INJECTION MOLDING
Precision Injection Molding
Over 40 injection molding machines with robotic handling and automatic material feeding.
AUTOMATION
Automated Production
Automated workstations and continuous production lines improve assembly consistency and manufacturing efficiency.
05 / LABORATORY & TESTING
Quality You Can MeasureProfessional Laboratories
Sound, Backed by Evidence
Acoustic performance, reliability, precision dimensional and material testing
support validation from development through volume production.
Acoustic Testing
Klippel RD Test System
Acoustic performance measurement and analysis during speaker development.
Acoustic Testing
SoundCheck QC Test System
Speaker acoustic testing for R&D validation and production quality control.
Reliability Testing
Temperature Test Chamber
High- and low-temperature load, storage and thermal cycling tests.
Reliability Testing
Power Test System
Validation of maximum output power and continuous rated power performance.
Environmental Compliance Testing
RoHS Analyzer
Hazardous substance screening and environmental quality control for materials and components.
Precision Measurement
Coordinate Measuring Machine
Measurement of component dimensions and geometric features.
Precision Measurement
2.5D Vision Measuring System
Component dimension and profile measurement for incoming and in-process inspection.
Magnetic Testing
Magnetic Property Test System
Magnetic material testing to support speaker magnetic circuit design and quality inspection.
Component Testing
Spider Displacement & Cone F0 Testing
Spider displacement and cone resonance measurements to verify critical acoustic components.
05 / INNOVATIONSS66-401 · REV A-0 · 2026.08.25
ACOUSTIC INNOVATION / PRODUCT SHOWCASE
Ultra-Slim Coaxial Speaker
Compact Space. Complete Sound.
The SS66-401 combines a full-range diaphragm and center-mounted tweeter within a compact Ø66 mm diameter, balancing a slim profile, low-frequency design and wide frequency response. Specifications below are based on revision A-0.
11.5mmSlim Profile · Nominal Height
130HzNominal F0
80dBNominal SPL
10WRated Power RMS
FOUR DESIGN HIGHLIGHTS
Four Key Features
Explore the design through specifications, structural drawings and stated test conditions.
Ultra-Slim Profile
H11.5 mmThe specification cover lists nominal dimensions of Ø66 × H11.5 mm for designs with limited speaker mounting depth.
Low F0 Design
130 HzNominal resonance frequency F0 is 130 Hz ±20%, measured with a 1 V input using Klippel equipment.
Sensitivity
80 ±3 dBNominal sound pressure level is 80 dB ±3 dB, measured at 1 W / 1 m with a baffle.
Coaxial Tweeter
Full-Range + TweeterProduct images and drawings show a center-mounted tweeter. The specification lists separate DC resistance values for the tweeter and woofer.
TECHNICAL DATA
Technical Specifications
Model / RevisionSS66-401 / A-0
Nominal DimensionsØ66 × H11.5 mm
Driver DimensionsØ66 × H7.5 mm
Nominal Impedance4 Ω ±15%
Rated / Maximum Power10 W / 12 W RMS
Resonance Frequency F0130 Hz ±20%
Sound Pressure Level80 dB ±3 dB1 W / 1 m, with baffle
Effective Frequency Range100 Hz–25 kHz−10 dB
Total Harmonic Distortion< 5%180 Hz–20 kHz，1 W / 1 m
Product Weight59 g ±5%
Nominal dimensions, driver dimensions and drawing annotations refer to different measurement locations. F0 tolerance is ±20% on the parameter page and ±10% in the drawing notes. Final mounting dimensions and tolerances are subject to engineering confirmation.
DIMENSION DRAWING
2D Structure & Mounting Reference
MEASURED PERFORMANCE
Acoustic Test Curves
Charts are from the original specification. SPL / THD were measured at 1 W, 1 m, in a full anechoic chamber with an IEC baffle.
01 / SPL
Sound Pressure Level
02 / THD
Harmonic Distortion
03 / IMP
Impedance
Source: SS66-401 Specification for Approval, revision A-0, August 25, 2026. This page introduces product characteristics; refer to the official specification for parameters and mounting requirements.
DESIGN PATENTS
Designs & Patent Documents
Two granted speaker design patents held by Anhui Yongtuo Audio Co., Ltd., plus a separately listed patent application acceptance record.
DESIGN PATENT · GRANTED
Speaker (Ultra-Slim Woofer)
- Patent Number
- ZL 2026 3 0066255.1
- Grant Publication Date
- 2026.08.14
- Patent Holder
- Anhui Yongtuo Audio Co., Ltd.
DESIGN PATENT · GRANTED
Speaker (Ultra-Slim, Coaxial)
- Patent Number
- ZL 2026 3 0028786.1
- Grant Publication Date
- 2026.09.08
- Patent Holder
- Anhui Yongtuo Audio Co., Ltd.
APPLICATION · ACCEPTED
An Ultra-Slim Woofer
Application Number 202620174142.8Acceptance Notice Date 2026.02.05
This is an application acceptance notice. Its status is listed separately from the two granted design patents above.
View Original Acceptance NoticeLET’S CREATE BETTER SOUND
Your Next Product
Deserves Better Sound.
Talk to Yongtuo about your acoustic design and manufacturing needs.
Business Contacts
Taiwan Contact: 林仲祥
+886 937 736 116 ↗Address
No. 201 Jingsan Road, Tianchang, Anhui, China