Speakers

Part Number	Description / PDF	Quantity
BOX1-18082-7SP Seltech	SPEAKER BOX WITH SOLDER PADS - 1	0
WD11903Y8H Seltech	SPEAKER 8OHM 500MW TOP PORT	92
SOC40S19DN4 Seltech	SPEAKER 4OHM 5W TOP PORT	0
CO2014L038BN8GMDAW Seltech	SPEAKER 8OHM 500MW TOP PORT	90
BR1506L025YN32M Seltech	RECEIVER WITH MESH - TELECOM - 6	70
SOR4030S11ZN25 Seltech	SPEAKER - 40 MM X 30MM X 11.5MM	100
BR1511L035UN6-WP Seltech	SPEAKER 6OHM 700MW TOP PORT	90
SOD20722X50CV Seltech	50MM SPKR; 50 OHM, VERT. CONTACT	58
CC18S05YN4 Seltech	SPEAKER - 18 MM DIAMETER - 4 OHM	98
BR815S15YN32 Seltech	RECEIVER - TELECOM / HAC - 8 X 1	0
CR1511L030UN8-2 Seltech	MICROSPEAKER - 11 X 15 X 3.5MM -	100
SOC50C07Y50 Seltech	SPEAKER - 50MM DIAMETER WITH WIR	72
SOC36S05B8-1 Seltech	SPEAKER 8OHM 1W TOP PORT	0
NC52W33DF8 Seltech	SPEAKER - TELECOM - 52MM DIAMETE	50
BOX1-18082-2B100GDA Seltech	SPEAKER BOX WITH WIRES + GASKET	0
BOX1-18082-2B100 Seltech	SPEAKER BOX WITH WIRES - 1 SPEAK	80
GR1407S030YN8WP Seltech	5 ATM SPEAKER; 7X14MM	94
CR1813L025UN8-2 Seltech	MICROSPEAKER - 13 X 18 X 2.5MM -	100
TR1205S030YN8 Seltech	SPEAKER 8OHM 300MW TOP PORT	236
CR1609L030BN8 Seltech	SPEAKER 8OHM 500MW TOP PORT	98

Speakers

1. Overview

Speakers are electroacoustic transducers that convert electrical audio signals into sound waves. As critical components in audio systems, they reproduce audible frequencies (typically 20Hz-20kHz) with controlled directivity and fidelity. Modern speaker technology integrates materials science, electromagnetism, and digital signal processing to deliver immersive audio experiences across consumer, professional, and industrial applications.

2. Main Types and Functional Classification

Type	Functional Characteristics	Application Examples
Dynamic Speakers	Electromagnetic driver with cone diaphragm, wide frequency response	Home theaters, PA systems
Electrostatic Speakers	Thin membrane with electrostatic field, excellent transient response	High-end audiophile systems
Planar Magnetic	Flat diaphragm with printed circuits, precise sound imaging	Studio monitoring, headphones
Coaxial Speakers	Multiple drivers on single axis, improved phase coherence	Car audio systems
Subwoofers	Specialized for low-frequency reproduction (20-200Hz)	Cinema sound systems

3. Structure and Components

Typical speaker systems consist of:

Transducer Elements: Voice coil, magnet assembly, diaphragm
Cabinet: Made from MDF, aluminum, or composite materials
Crossover Network: Passive/active filters directing frequencies to drivers
Connectors: Binding posts, TRS/XLR inputs, or wireless modules
Damping Materials: Acoustic foam for resonance control

4. Key Technical Specifications

Parameter	Description	Significance
Frequency Response	20Hz-20kHz 3dB	Defines audible range accuracy
Sensitivity	85-100 dB/W/m	Efficiency in sound production
Impedance	4 , 6 , 8 nominal	Matching with amplifiers
Power Handling	20-1000W RMS	Maximum safe operating level
THD	<0.5% at 1W	Audio signal purity

5. Application Areas

Consumer Electronics: Smart speakers (Amazon Echo), soundbars
Professional Audio: Studio monitors (Yamaha HS8), live sound systems
Automotive: Door speakers, active noise cancellation systems
Commercial: Distributed audio in retail spaces, emergency PA systems
Immersive Systems: Dolby Atmos home cinema setups

6. Leading Manufacturers and Products

Manufacturer	Representative Product	Key Innovation
Bose	901 Direct/Reflecting Series	Omni-directional sound field
KEF	LS50 Wireless	Uni-Q concentric driver
Bowers & Wilkins	800 Series Diamond	Matrix internal bracing
Yamaha	HS8 Studio Monitor	Neutral sound reproduction
Harman Kardon	Invoke	Cortana integration

7. Selection Recommendations

Key selection criteria:

Match impedance/power handling with amplifier specifications
Room size vs. speaker sensitivity (e.g., 88dB+ for large spaces)
Crossover frequency alignment in multi-way systems
Material durability for environmental conditions (humidity, temperature)
Budget allocation: 30-50% of total audio system cost recommended

8. Industry Trends Analysis

Emerging developments include:

Integration of AI-powered room calibration (Dirac Live, Audyssey)
Multi-directional transducers for 3D audio in VR/AR applications
Development of micro-speakers using graphene diaphragms
Adoption of wireless mesh networks (WiSA technology) for speaker arrays
Growth of automotive audio systems with headrest-integrated transducers