Why Aurora Sound Is the Voice Amplifiers Manufacturer Global Buyers Trust
Aurora Sound manufactures voice amplifiers for two clear buyer groups: education and training buyers who need a portable waist-hung amplifier that survives a full teaching day, and entertainment buyers who want an all-in-one karaoke machine with a built-in screen and wireless microphones.
The K90 is our all-in-one Android karaoke platform with an 11.6 inch touch screen and two wireless UHF microphones. The M28 is the portable teaching and tour guide amplifier — a 1,500mAh dual-channel unit rated for 9 hours, which is deliberately a full school day plus margin.
Short version: we are the factory, not a trading desk. Our production base is operated together with parent company Shenzhen Aurora Technology Limited — 400+ employees, 8 production lines, 5,000,000+ units annual group capacity and a defect rate below 1.5%. Quotation requests are answered within 3 hours. Below is how that compares with a typical catalogue supplier.
| 능력 | Aurora Sound — Voice Amplifiers Manufacturer | Typical Catalogue Supplier |
|---|---|---|
| Product scope | Portable amplifiers + all-in-one karaoke | Waist-hung amplifier only |
| Battery | 1,500mAh / 9H on M28 | 3-4H, fails mid-day |
| Channels | Dual channel stereo on M28 | Single mono channel |
| Display | 11.6 inch HD touch screen on K90 | No display |
| Microphones | 2x wireless UHF included on K90 | One wired headset |
| Wireless | BT plus UHF mic pairing | Wired only |
| OEM MOQ | From 1 set | 500+ sets |
| Lead time | 3-7 days stock / 12-18 days custom | 30-45 days |
| Certifications | CE, RoHS, FCC | CE only |
Who We Are — Shenzhen Aurora Sound Technology Limited
Shenzhen Aurora Sound Technology Limited is a professional audio acoustic product manufacturer based in Shenzhen. The company is invested by Shenzhen Aurora Technology Limited, an established industrial enterprise with 400+ employees, RMB 300 million annual industrial output, and long-term supply relationships with Walmart, Bosch and Ford.
We specialise in the R&D, production and global export of voice amplifier and the wider acoustic range covering lavalier microphones, smart audio glasses, wireless earphones, Bluetooth speakers and voice amplifiers. We currently export to 50+ countries and support FBA and direct-to-warehouse shipment for e-commerce buyers.
Factory Capability — Our Parent-Backed Manufacturing Base
Production Scale
- 8 production lines — SMT, acoustic assembly, final assembly and packing under one roof
- 5,000,000+ units annual group capacity — annual capacity across all audio categories
- defect rate below 1.5% — defect rate held below this on shipped lots
- 100% on-time dispatch — on-time dispatch record
Engineering & R&D
Our engineering team handles acoustic design, RF tuning, firmware and industrial design in-house. That is what allows us to change an EQ profile, a noise-cancelling behaviour or a housing colour within a running program instead of handing the change to a third party.
Vertical Integration
We control driver selection, chamber design, PCBA, firmware and final assembly. For voice amplifier programs this means the sample you approve is the unit that ships at volume — the most common failure point when a brand works through a trading company instead of a manufacturer.
Voice Amplifiers We Manufacture
All-in-One Karaoke Machines
Self-contained entertainment systems with screen, amplifier and wireless microphones in one unit.
Models: K90
- 11.6 inch HD touch screen with lyrics display
- Android system
- 2x rechargeable wireless UHF microphones
- Dual 8 inch woofers
- Rechargeable 12V battery, BT 5.0 / USB / HDMI
- Black and beige colour options
Portable Voice Amplifiers
Waist-hung amplifiers built for a full teaching or guiding day.
Models: M28
- 1,500mAh battery rated for 9 hours
- Dual channel stereo output
- Noise cancelling
- Works with iPhone, Android and camera
- Compact waist-hung design, ~200g
Manufacturing Process — How We Build Voice Amplifiers
| Step | What Happens |
|---|---|
| 1. Incoming QC (IQC) | Components, cells and acoustic drivers inspected against AQL before they reach the line. |
| 2. SMT & PCBA | Automated surface-mount placement and reflow for the main board, followed by AOI inspection. |
| 3. Acoustic assembly | Driver mounting, chamber sealing and acoustic mesh placement in a dust-controlled area. |
| 4. Firmware loading | Bluetooth pairing logic, EQ profile and voice-prompt language written and verified. |
| 5. In-process QC (IPQC) | Sampling at each station; deviations trigger line stop and root-cause review. |
| 6. Final assembly | Housing, battery, antenna and finishing parts assembled; cosmetic inspection. |
| 7. Functional test (FQC) | 100% audio, RF, battery and button test before packing. |
| 8. Outgoing QC (OQC) | AQL sampling on finished cartons plus drop-test verification before dispatch. |
Testing & Quality — Proving Every Unit Before It Ships
We run 5-stage QC (IQC / IPQC / FQC / OQC / AQL sampling). Every unit passes functional test before packing, and finished lots pass AQL sampling before dispatch.
| Test | Standard / Method | What It Proves |
|---|---|---|
| Output power & SPL | Rated load at maximum volume | Meets published output specification |
| Frequency response | Sweep across rated vocal range | Voice band clarity within spec |
| Battery runtime | Continuous amplification to cutoff | 9 hours on M28 |
| UHF mic pairing | Pairing and range bench test | Stable pairing within rated range |
| Feedback test | Maximum usable gain before feedback | Meets published gain margin |
| Drop test | 1.0m, 6 faces, packed | Housing and driver mounting intact |
| Thermal run-in | 4-hour continuous operation at max gain | No thermal shutdown or drift |
| AQL sampling | ISO 2859-1 level II | Lot-level gate before dispatch |
Certifications — The Paperwork That Protects Your Brand
| Certification | What It Means | Why Buyers Need It |
|---|---|---|
| CE | EU conformity for safety, health and environmental protection | Required to sell audio electronics in the European Economic Area |
| RoHS | Restriction of hazardous substances in electrical components | Mandatory for EU and increasingly for US retail channels |
| FCC | US Federal Communications Commission radio-frequency compliance | Legally required for any wireless product sold in the United States |
| BQB | Bluetooth Qualification Body listing for Bluetooth-enabled designs | Lets you legally use the Bluetooth wordmark and logo on retail packaging |
Applications — Where Our Voice Amplifiers Are Used
Classroom Teaching
Nine-hour portable amplifiers that last a full school day without recharging.
Tour Guiding
Waist-hung systems for tour operators, museums and coach tours.
Training & Fitness
Portable amplification for corporate training, gym instruction and workshops.
Home Karaoke
All-in-one K90 systems with screen and dual wireless microphones.
Events & Small Venues
Portable PA for outdoor events, ceremonies and community functions.
OEM/ODM Process — From Inquiry to Shipment
| Step | Action | Typical Timeline |
|---|---|---|
| 1 | Inquiry & requirements review | Day 1 |
| 2 | Engineering feasibility review | 1-2 days |
| 3 | Quotation & sample plan | Day 3 |
| 4 | Prototyping / sample build | 7-12 days |
| 5 | Sample approval (customer side) | 3-7 days |
| 6 | Mass production | 12-18 days (stock) / 35-45 days (custom) |
| 7 | Pre-shipment QC & AQL report | 2-3 days |
| 8 | Shipment & logistics | Per destination |
FAQ — Voice Amplifiers Manufacturer Buyers' Top Questions
What is the difference between a voice amplifier reseller and a voice amplifiers manufacturer?
A reseller buys finished amplifiers and can usually only add a logo sticker. A voice amplifiers manufacturer controls the enclosure tooling, the amplifier matching, the battery selection and the firmware. At Aurora Sound that is how we can offer a genuinely rated 9-hour battery on the M28 rather than a 3-hour unit labelled as 9-hour — a common problem in this category that generates returns and bad reviews for the brand on the box.
What is the MOQ for custom voice amplifiers?
Stock models ship from 1 set, which makes sampling and small institutional pilots straightforward. Logo printing starts at 5 sets. Custom colour starts at 50 sets. Firmware tuning such as EQ, volume limiting or multi-language prompts starts at 200 sets. Full ODM with new tooling starts at 500 sets.
How long does the battery actually last on the M28?
The M28 carries a 1,500mAh battery rated for 9 hours of continuous use, which we specify as a full teaching day plus margin. We verify runtime by continuous amplification to cutoff rather than quoting a theoretical figure, and the test result is included in the FQC record. If your use case needs longer, ask about higher-capacity variants during the engineering review.
Can the K90 karaoke machine be branded for our market?
Yes. The K90 supports logo, colour, packaging and firmware customization. The Android system allows UI language sets and pre-loaded content configuration for different markets. Black and beige are standard, with custom Pantone available at higher volumes. We also support custom microphone branding and retail box design.
Do your voice amplifiers support wireless microphones?
The K90 ships with two rechargeable wireless UHF microphones as standard. The M28 accepts wireless lapel and headset microphones and works with iPhone, Android and camera inputs. If your program needs a bundled microphone configuration that is not in the current catalogue, we scope it during the engineering review.
What certifications do your voice amplifiers carry?
CE, RoHS and FCC. We hold certification on our own designs, so the certificate matches the exact model and configuration you order. Test reports and certificate copies are provided with the first shipment and on request during quotation.
Request a Quote — Start Your OEM Voice Amplifiers Program
Our engineering team returns a feasibility review and quotation within under 3 hours of a complete inquiry. To quote accurately we need:
- Target models or the specification you have in mind
- Required certifications for your market
- Annual volume estimate
- Customisation scope — logo, colour, packaging, firmware
- Target delivery port or FBA destination
Request a Quote → | Browse Voice Amplifiers → | See Our Factory →
Related Manufacturing Capabilities
Wireless Microphones | Bluetooth Speakers | Audio Accessories