21 Inch 4 Ohm Neodymium Subwoofer PA Speaker with Powerful Bass Performance

• Customization: Available
• Screen Size: Without Screen
• Application: Home, Commercial, Stage/Outdoor/Party
• Model NO.: K-21DS115-4
• Product Name: 21 Inch Subwoofer
• Nominal Diameter: 530mm/21.0inch
• Rated Impedance: 4 Ohm
• AES Power: 1700W
• Peak Power: 3400W
• Frequency Range: 30-1000 Hz
• Sensitivity: 97 dB
• Ebp: 120 Hz
• Magnet Material: Neodymium Inside Slug
• Voice Coil Diameter: 115 mm(4.5 in)
• Winding Material: Aluminium
• Winding Depth: 36mm/1.42in
• Lxwxh: 21.6*21.6*10.1 in
• N.W.(1PC): 15 Kg
• Customized: 2/4/8ohm
• Transport Package: Rigid Double Corrugated Shipping Carton
• Trademark: OEM/ODM
• Origin: Guangdong, China
• Production Capacity: 20000pieces/ Per Month
• Package Size: 64.00cm * 62.00cm * 35.00cm
• Package Gross Weight: 20.200kg

Product Description

 21 Inch 4 Ohm Neodymium Subwoofer PA Speaker with Powerful Bass Performance 2/4/8Ohm

·97 dB sensitivity
·30-1000 Hz response
·115 mm(4.5 in) Aluminium voice coil
·1700 W continuous program power capacity

 

Use for pro DJ speakers, pro PA speakers, pro karaoke speakers, live sound speakers, fixed installation speakers, studio monitors and home audio speakers.

Product Paramenters

TYPE	ND SUBWOOFER
Nominal Diameter	530/21	mm/in
Rated impedance	8	ohm
Minimum Impedance	6.4	ohm
AES Power Handing	1700	W
Max Power Handing	3400	W
Sensitivity	97	dB
Frequency Range	30-1000	Hz
Voice Coil Diameter	115/4.5	mm/in
Winding Material	Aluminium
Former Material	Glass Fibre
Winding Depth	36/1.42	mm/in
Megnetic Gap Depth	14/0.55	mm/in
Megnetic Material	Neodymium Inside Slug

THIELE & SMALL PARAMETERS
Resonance frequency	Fs	27	Hz
Dc resistance	Re	4.4	ohm
Mechanical factor	Qms	6.5
Electrical factor	Qes	0.23
Total factor	Qts	0.22
BL factor	Bl	46.6	T.M
Effective Moving mass	Mms	405	g
Effective Cas air load	Vas	200	liters
Effective piston area	Sd	1680	cm2
Inductance	Le	4.3	mh
Max linear excursion	Xmax	±15	mm
	EBP	117	Hz

 

MOUNTING AND SHIPPING
Overall Diameter	550/21.6	mm/in
Bolt Circle Diameter	528/20.7	mm/in
Mount Baffle Cut-out	506/19.9	mm/in
Speaker Depth	257/10.1	mm/in
Flange And Gasket Thickness	15/0.59	mm/in
N.W.(1pc)	15 / 33.0	kg/lb
G.W. (1 pcs)	20.2 / 44.5	kg/lb
Shipping Size (1pcs)	640x610x350 mm	25.2x24.0x13.7  in

 

Details Images

 

Welcome to
 

Company Introduction

 

Our advantage

·Have a product development and design team.On average, at least 10 new products are developed annually.

·Our R&D personnel have 22 years of design and development experience
·Development assistance software: FINEMOTER, LMS, CLIO, COMSOL

TJ Audio Speakers is favored and recognized by customers for its high-quality products and beautiful prices. We look forward to receiving your inquiries!

Customer Case

 

FAQ

Q1: How can I get sample?
A: If you need a sample test, please contact us. We will make it according to your requirements. But you may need to pay the sample fee and its shipping fee.

 

Q2: How much is the shipping cost for samples?
A: Different sample have different weights and packaging sizes. Please contact us for details.
 

Q3: Can I print my logo on the product and packaging?
A: Of course you can. Just need you to send us your logo design and authorization documents, we will make it on the product and packaging according to your request for your confirmation.
 

Q4: Can you produce according to customer's design?
A: Yes. We mainly do OEM/ODM services.
 

Q5: How are your products packaged?
A: Generally, we pack in brown cartons.
 

Q6: How to strictly control the quality of products?
A: We have strict quality control on products from raw materials to production process, and all products are tested before leaving the factory.

Packing&Shipping

Packing:

1)Neutral Packing 2)Strong Carton 3)Reinforce the edge with hard paper 4)Put into another shipping carton

Shipping:
 

1)Ocean Transport  2)Air Transport  3)Rail Transport  4)Road Transport  5)International Express