Guangdong, China
Business Type:
Registered Capital:
500000 RMB
Plant Area:
>2000 square meters
Management System Certification:
ISO 9001
Average Lead Time:
Peak season lead time: within 15 workday
Off season lead time: within 15 workday
OEM/ODM Service
Sample Available

Power Amplifier, Four Channel Amplifier, High Power Amplifier manufacturer / supplier in China, offering 4*800W 4 Channels Professional 2u Power Amplifier, Three Channels Professional Power Amplifier for KTV (ME34), 3 Channel 400W Power Amplifier for Speakers and so on.

Gold Member Since 2016

4*800W 4 Channels Professional 2u Power Amplifier

Get Latest Price
Min. Order / Reference FOB Price
1 Piece US $280-680/ Piece
Port: Guangzhou, China
Production Capacity: 2000 PCS Per Month
Payment Terms: T/T, Western Union, Paypal, Money Gram, cash
Type: Professional Amplifier
Usage: KTV System, Club, Stage, School, Church
Used For: Professional
Tube Type: Transistor Amplifier
Function: Post Amplifier
Sound Channel: 4.1

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Basic Info

Model NO.: QM408
Output Number: 4
Voltage: AC 220V
Element Number: Push-Pull Amplifier
Circuit: Td
Warranty: Two Years
Connector: Original Neutrik
Dimension(Wxhxd): 483X88X396 (mm)
Aging Test: 4 Hours
Rack Size: 3u, 4u
Color: Customized
Transformer: Toroidal
Heat Sink: Air Cooling
Housing: Metal
Trademark: LONZN or OEM
Transport Package: Carton with Water-Proof Bag
Specification: 2U
Origin: Guangzhou, China
HS Code: 8518400090
  • QM series of amplifiers are designed with perfect protection circuit,  uses mature Class AB amplifying circuit design, which leads to its static performance, high efficiency, safety.
  • Unique design and special makes the outstanding cabinet.
  • It can be used Stereo Mode or parallel connection single channel mode.
  • The extra gain switch can choose kinds of amplification multiple, which can match diffirent peripheral equipments.
  • The high-performance heat dissipation design and the comprehensive Automatic protection measures make it possible to match diffierent professional occasions.
Features :                                                                                                                                

•   Very high power and channel density

•   Four-channel flexibility

•  Automatic SMT technology, there will be little mistake in producing.

•  Zero current transition system protects the amplifier well.

•  DC protection, Overload protection, Overheat protection, Short circuit protection, Soft start

•  4 hours of aging test make every amplifier work smoothly before package.

•  Efficient cooling system, 100% pure copper heat sink

•  Thickening steel plate design.

•  Comprehensive protection and warning

•  Warranty: 2 years Guarantee.


Stage, Convention Centers, Ballrooms, Conference room, Theaters, Club, Church, Concert and etc.

Related Products: 
Output power      
Stereo Power()4 X 300W4 X 400W4 X 600W4 X 800W4 X 1000W4 X 1300W
Stereo Power()4 X 450W4 X 600W4 X 900W4 X 1200W4 X 1500W4 X 1950W
Bridged mono power()1200W1800W2400W3000W3600W4200W
Bridged mono power()1600W2400W3200W4000W4800W5600W
THD<0.5%(10% of full power); 
IMD<0.1%(60Hz/7KHz,10% of full power)
S/N Ratio>105dB(A weighted)
Dampling Factor600:1
Frequency Response±0.1dB, 20Hz~20KHz
Channel Gain Difference<0.25dB
Stereo Isolation≥-70dB
Slew Rate>80V/μS
Input Resistance20K ohms balanced, 10K ohms unbalanced
LED signalSignal, Power, Clip, Protection
Max Power Consumption1680W2526W3368W4200W5000W6000W
Dimension(W)483 *(D)370 * (H)88mm

10 Reasons to choose us!
1. Full product line & One-stop service can meet all your need.
2. All products are designed by our development team according to the market trends.
3. All products & material pass quality-oriented inspection.
4. Abundant supply ability, Monthly production capacity is above 2000pcs.
5. Every client's information will be protected.
6. KEY account management, such as special discount and protection of sales area.
7. Fast delivery.
8. 2 years warranty.
9. Prompt solution can be provided to you by our professional engineers and staffs.
10. Excellent prompt 24 hours on-line service. ( pre-sale Service, Middle-sale Service & after-sale service.)
1. Who are you?
RE: Kaitew Industrial limited registered in Hongkong while we have factory in Guangzhou covers an area of 5,000 square meters. We've been devoting ourselves to the R&D, manufacturing and marketing of high-quality professional audio system for over 10 years.
2. What's your main product lines?
RE: Power Amplifier & Processor,Martin Style Line Array, PA system, Stage Monitor, Subwoofer, Home Theater, Karaoke Speaker, 
3. Do you support OEM service?
RE: Yes, if you have your own brand, we can provide perfect OEM/ODM service with your own brand.
4. What is the MOQ?
RE: MOQ is 1 piece, 
1piece for sample checking is available.
5. Do you support spare parts?
RE: Yes, 1% free spare parts are sent together with every shipment.
6. What kind of payments does LONZN support?
RE: T/T, L/C, Western Union, Money Gram, Cash are acceptable.
7. How about the delivery time and how do ship the goods ?
RE: 3-7 days for trial order.

15 days or more for quantity order since receipt of 30% T/T deposit payment.
For sample order we usually ship by DHL, UPS, FedEx or TNT. For big order, Airline and sea shipping is also optional.
8. What is your packing?
RE: In sea cargo, Items will be packed with PE foam, then put it into carton. And, pallet with soft cushioning packing materials will protect the items during shipping.
In air cargo, items will be packed with PE foam, then put it into carton with wooden frame for protection.
9. How do you follow my order?
RE: We'll give you regular production status reports, ensure delivery time and arrange freight forwarding, oversee packing and loading of cargo.
We'll response to your ANY Feedback promptly & keep in touch with you regularly.
RE: We'll reply the inquiry during your regular business hours, inquiries are normally answered within 2-10 hours of receipt INCLUDING HOLIDAYS.
Contact details:
Contact Person: Angelia

Mobile: +86 137 5172 9465
Factory Audit are welcome. Should ANY QUERY, Just Call Angelia.


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