What is the input sensitivity?

The input sensitivity is 0.77V across the different models in the series.

What is the power supply requirement?

The main power supply is AC: 220-230V at 50Hz/60Hz.

Professional Power Amplifier 400W 4 Channels

Name: Professional Power Amplifier 400W 4 Channels
Brand: DONGGUAN FDB AUDIO MANUFACTURE CO .,LTD
SKU: 943377925

Guangdong, ChinaDONGGUAN FDB AUDIO MANUFACTURE CO .,LTD

US$1.00-3,000.00

1 Piece

Product profile

Customization

Available

Type

Professional Amplifier

Used for

Professional

Model NO.

TA4.4

Function

Pre-Amplifier

Usage

PRO Amplifier

Tube Type

PRO Amplifier

Stereo Power(8ohms)

2*1380W

Stereo Power(4ohms)

2*2288W

Bridge Power(8ohms)

4576W

Frequency Response

20Hz-20kHz

Input Sensitivity

0.77V

Signal to Noise

≥91dB

Thd

≤0.03%

Crossover Frequencies

700Hz, 1.9kHz Passive

Main Power Supply

AC:220-230V 50Hz/60Hz

Packing Size

500*510*135mm

Net Weight

34.7kg/PC

Transport Package

Carton Box

Specification

480x450x100mm

Trademark

FDB

Origin

Dongguan, China

HS Code

8518900090

Production Capacity

5000PCS/Month

Key features

Advanced SMT Technology: PCB board uses SMT manufacturing for high stability and anti-jamming.

Robust Protection System: Includes soft start, overheating, overcurrent, DC, and RF protection.

High Damping Factor: Factors range from >240 to >280 for flexible low-frequency control.

OEM and ODM Services: Customization available for professional audio product requirements.

ISO 9001 Certified Quality: Manufactured under strict ISO 9001:2008 quality management standards.

Fast Lead Time: Peak and off-peak season lead times are within 15 working days.

Company profile

DONGGUAN FDB AUDIO MANUFACTURE CO .,LTD

Guangdong, China

CertifiedBusiness Type: Manufacturer/Factory & Trading Company CertifiedR&D Capacity: ODM Service Available & OEM Service Available CertifiedNearest Port: Guangzhou Port, Shenzhen PortAverage Response Time: ≤24h CertifiedTerms of Payment: LC, T/T, Small-amount payment CertifiedInternational Commercial Terms(Incoterms): FOB, CIF, CFR, EXW

AI-Powered supplier vetting

SummaryThe supplier is a China-based professional audio manufacturer with operations in Dongguan, Guangdong, and reported establishment dates of 2006 and 2010 in different records. Its stated product scope includes professional transducers, speaker cabinets, amplifiers, processors, horns, and related accessories. Evidence indicates a 7,500 m² manufacturing plant, 98 employees, advanced production and testing equipment, 10 R&D engineers, and ISO9001:2015 and ISO14001:2015 certifications. The company reports cooperation with BOSE, Thoman, and Proel in developing models, as well as positive customer feedback regarding quality stability, reliability, and consistency. However, the records contain inconsistent legal/company names and entity classifications, and provide insufficient evidence regarding after-sales processes, financial credibility, and formal customization services.

Supplier typeThe records identify the supplier as a manufacturing-oriented company in the professional audio sector, with a Dongguan manufacturing address, a 7,500 m² plant, and products including transducers, cabinets, amplifiers, and processors. However, one record classifies the company as a trade company, while another identifies a limited manufacturing company, so the exact legal and operating classification is inconsistent.

CertificationsThe supplier explicitly reports ISO9001:2015 and ISO14001:2015 certifications, and also describes a formally enforced quality management system. This provides direct evidence of certified quality and environmental management systems.

R&D capabilityThe supplier reports dedicated R&D activity, 10 R&D engineers, advanced technology and testing equipment, development cooperation with materials and accessories manufacturers, and joint model development with BOSE, Thoman, and Proel. These details directly support meaningful product-development capability.

Production capacityEvidence supports in-house manufacturing of professional audio products, including a 7,500 m² plant, 98 employees, advanced production equipment, testing apparatus, and a broad product range. The supplier also describes established quality-control processes, indicating a substantive production operation.

Client casesThe supplier explicitly states that it cooperated with BOSE, Thoman, and Proel on new-model development, and reports positive feedback from local and overseas customers regarding stable quality, reliability, and consistency. These are direct customer-related references, although the records do not provide project details, dates, or independently verified case documentation.