What is the lead time for production?

The average lead time is within 15 workdays for both peak and off-peak seasons.

What are the input and output connections?

It features Combo XLR input sockets, Link XLR sockets, and Speakon output connectors.

What is the THD (Total Harmonic Distortion) level?

The THD is less than 0.05% at 1kHz and less than 0.1% at 20Hz-20kHz for 1W.

Class D Power Amplifier K4-1700 4 Channels 2800 Watt Karaoke Amplifier

Name: Class D Power Amplifier K4-1700 4 Channels 2800 Watt Karaoke Amplifier
Brand: Guangzhou Xinbaosheng Audio Equipment Co., Ltd.
SKU: 711213122

Guangdong, ChinaGuangzhou Xinbaosheng Audio Equipment Co., Ltd.

US$400.00-600.00

1 Piece

Product profile

Customization

Available

Type

Professional Amplifier

Usage

Hi-Fi, AV, KTV System, Stage

Model NO.

K4-1700

Used For

Professional

Tube Type

Transistor Amplifier

Function

Post Amplifier, Amplifier Combined, Pre-amplifier

Sound Channel

4.1

Output Number

Voltage

110V or 220V

Element Number

Monoamplifier

Conductive Mode

Amplifier Type

1u Digital Amplifier

Product Name

K4-1700 Power Amplifier

Class

Class D Power Amplifier

Channel

4 Channel

Output Power 4Ω

2800wx4CH

Output Power 8Ω

1700wx4CH

Frequency Response

20 Hz - 20 kHz

Application

Commercial, Professional Performance

Certificates

CE, RoHS

Warranty

Three Years

Service

OEM ODM Support ;After-Sale Service

Transport Package

Strong Packing

Specification

Trademark

Sinbosen

Origin

Guangdong Province, China

HS Code

85184000

Production Capacity

5000 PCS/Month

Key features

High Power Output: Delivers 2800W per channel at 4 Ohms or 1700W at 8 Ohms for powerful audio performance.

Class D Efficiency: Uses Class D module with R-SMPS for high efficiency, low heat, and compact 1U design.

Comprehensive Protection: Features short circuit, thermal, overload, DC, and open circuit protection systems.

Superior Sound Quality: Low THD (<0.05%), high SNR (>106dB), and DSP processor for clear, powerful bass.

Flexible Customization: Supports OEM/ODM, full customization, and minor adjustments based on client needs.

Wide Voltage Range: Operates on 90-265V AC with PFC, suitable for global power standards.

Professional Warranty: Provides a three-year warranty with engineer support for quality issues.

No MOQ Limit: Accepts orders from 1 piece to large volumes with no minimum quantity restriction.

Company profile

High Repeat Buyers ChoiceYears of Export Experience

Guangzhou Xinbaosheng Audio Equipment Co., Ltd.

Guangdong, China

CertifiedBusiness Type: Manufacturer/Factory & Trading Company CertifiedR&D Capacity: ODM Service Available CertifiedCustomization Options: Customization from Samples, Customization from Designs, etc. CertifiedExport Year: 10 Years CertifiedNearest Port: Guangzhou PortAverage Response Time: ≤4.50h

AI-Powered supplier vetting

SummarySinbosen demonstrates broad customization and ODM capability, has introduced new products within the past year, and reports RoHS compliance. It offers small orders and customized samples, a stated three-year warranty, 18-hour service availability, and free after-sales support for quality or product problems. Production indicators include seven production lines, six to ten quality-control staff, inventory capability, and lead times within 15 working days in both peak and off-season periods. However, the supplier has no valid manufacturing-capacity contract with related subcontractors, no supplier management-system certification, no overseas warehouse, overseas branch or agent, showroom, or offline trade-show participation. Inspection and supplier-assessment procedures exist without records, and approved-supplier lists lack signatures or dates. Financial information is present only as year labels, so financial credibility cannot be verified. Customer-case evidence is limited: no Fortune 500 cooperation or...

Supplier typeThe supplier presents itself as a manufacturer with R&D, ODM, customization, inventory, and seven production lines. It exports mainly to Europe and North America, but has no overseas warehouse, branch, agent, showroom, or overseas-service country coverage.

CertificationsRoHS is explicitly identified as the supplier’s sustainable-development and product-compliance certification. However, supplier management-system certification is listed as NIL, so certification coverage is limited to the stated product-related standard.

After-Sales capabilityThe supplier states that it provides a three-year warranty, welcomes small orders and customized samples, offers 18-hour online service, and provides free after-sales support for quality or product problems. These are explicit service commitments, although no performance records are provided.

R&D capabilityThe supplier reports new products within the past year, ODM service, and broad design customization. It has two years of total R&D-engineer experience and no available SDK, indicating some product-development capability but limited evidence of advanced technical integration.

Production capacityProduction evidence includes seven production lines, six to ten quality-control staff, inventory capability, 30 qualified service-capability suppliers, and lead times within 15 working days in peak and off-season periods. A material control weakness is that no valid manufacturing-capacity contract exists with related subcontractors, while inspection and supplier-assessment procedures lack records.

Customization capabilityThe supplier explicitly supports customization from samples, full customization, customization from designs, minor customization, flexible customization, ODM services, and customized samples for small orders. This is direct evidence of broad customization flexibility.

Client casesThe supplier reports no OEM service for popular brands and no cooperation with Fortune 500 companies. No named customers, project examples, or verifiable case studies are provided, so customer-case strength cannot be established.