Technical Help
& Education
Glossary Of Terms
Speakers Main Page
How Speakers Work
Choosing Speakers
What's A Woofer?
What's A Midrange?
What's A Tweeter?
Other Speaker Types
More Speaker Types
What's A Capacitor?
Installing A Capacitor
What's A Crossover?
What's An Equalizer?
Speaker Enclosures
Theile/Small Param.
About Power Amps
Installing An Amp
Installation Tips
Power Ratings
Installing/Replacing
Head Units/Receivers
Installing Neon/LED
Eliminating Noise
Use The Right Tools
Manufacturer's Links
Home Stereo
Tech Information
FAQ
Glossary
Home Speakers

Personal Stereo
& Electronics
Laptop Computers
Cell Phones & PDAs
Portable TV & Video
Electronic Readers
MP3/Music Players
CD Players/Booms
Earphones/Buds
Digital Cameras
Video Cameras
Personal GPS
Bluetooth
Calculators
Accessories

Marine Stereo &
Electronics
Stereo Amplifiers
Stereo Speakers
Stereo Woofers
Woofer Tubes
Enclosed Speakers
Wakeboard Speakers
CD/Mp3 Receivers
TVS & Video
VHF Radios
GPS Navigation
Fish Finders
Depth Finders
Chart Plotters
Accessories

Home Stereo
& Electronics
Flat Screen & HD TVs
Surround Sound
Home Theater
DVD Players/Tivo
DVD Recorders
Blu-Ray Devices
Amplifiers/Tuners
Speaker Systems
Subwoofer Drivers
Midrange Drivers
Tweeter Drivers
Powered Subwoofers
Outdoor Speakers
Stereo Accessories
Digital Photo Frames
Video Game Systems
Game Accessories
Video Games
Home Security/Alarms

Computers &
Related Products
Desktops & Laptops
Add-Ons/Peripherals
Computer Monitors
Computer Software
Computer Games
Printers & Scanners
Ink/Specialty Papers
Parts & Components
Computer Supplies
Security/Tech Support

Car Stereo &
Electronics
Amplifiers
Subwoofers
Full-Range Speakers
Midrange Speakers
Tweeters
Power Capacitors
Empty Enclosures
Loaded Enclosures
CD/Mp3 Receivers
CD Changers
Bass Packages
Car TV & Video
Satellite Radio
Bluetooth Wireless
GPS Navigation
Neon/LED Lighting
Radar Detectors
Chrome Mufflers
Car Alarms/Security
AUTO PARTS STORE
Auto Wiring &
Accessories
Air Horns
Power Antennas
Antenna Boosters
A/V Controllers
Bass Blockers
Crossovers
Dynamat
Equalizers
Fans (Cooling)
FM Modulators
Interfaces
Line Converters
Noise Filters
Power Inverters
Power Supplies
RCA Cables
RCA Splitters
Remote Controls
Signal Boosters
Vibration Control
Speaker Grills
Wiring Kits

Sponsored
Advertisers

America's
Electronics
Superstore

Huge Selection
Of Speakers &
Drivers From
Speaker Store

Help For Writers From WM
Publishing

Barbara, A Novel
Of First-Time
Intimate Sexual
Adventure

Cute The Novel
(Coming Soon)

Season's
Readings, A
Book Of Essays

MetroDirect
Communications

Huge Selection
Of Car Power
Amps From
The Amp Depot

Huge Selection
Of Car Audio
Capacitors From
Powercaps

Logos, Banners
& Web Design
By R. LeBeaux

- Bleep Them -
Humor, Satire
& Nasty Stuff

Fine Art & Wood
Sculpture

Free Audio &
Stereo Tech
Information

 

 

Dual-Cone, Dual-Voice-Coil
& Full-Range Speakers

Dual-Cone Speakers
Some factory installed and replacement auto source speakers are of the dual cone type. Sometimes also referred to as a "full-range" speaker, it uses an inexpensive, but efficient design. The small "whizzer" cone attached to the center of the main cone extends the high frequency range, but not with the wide dispersion or intensity of a separate tweeter driver. The main advantage of such speakers lie in their low cost.

Dual-Voice-Coil Or Dual-Channel Speakers

These are woofers with two separate voice coils mounted on a cylinder connected to a common cone. These are most often interconnected so as to allow the woofer to handle a lower impedance load at it's optimal power capacity.

They can also be connected to separate amplifiers in order to produce a common bass wave from two amplifier channels through a single woofer. Since bass has a non-directional character, this does not interfere with the optimum reproduction of the stereo image in the other speakers.

Thus, a correctly configured single driver can often provide as much bass as multiple drivers, and in a smaller enclosure.
Great care should be taken in making connection from the amplifier, to observe proper polarities, especially when conected to separate channels. Failure to do so, can result in the quick extinction of the driver if the amplifiers are pulling the voice coil form in different directions at once.

Impedances for these speakers can be configured in a variety of values including different levels for each one. The most popular format is to have each coil optimized for 4 ohms, although 6, 3, 2, and even 1 ohm coils are not uncommon. Some specialized units may have 4 and 2, or 8 and 4 ohm coils, although these are fairly rare and usually proprietary designs.
The same considerations of enclosure volume, power handling, and frequency response apply to these drivers as they do to all others.