Each channel on an amplifier will power one speaker using a positive and negative cable. There are various types of amplifiers, each designed to power a certain number of speakers. Monoblock amplifiers, also known as single channel, are designed to power one or more subwoofers. These amplifiers often have very high power ratings. On the other hand, multi-channel amplifiers power multiple speakers, usually at lower power ratings. 2-Channel and 4-Channel amplifiers can power car speakers or low powered subwoofers. Occasionally you might see a 5 or 6-channel amplifier that can power speakers and subwoofers at the same time. The most common setup is a monoblock amp to run subwoofers and a 4-channel amp to run door speakers. Check out our Knowledge Base for more information.
An amplifier increases the power of the signal being fed to it by taking energy from its power supply and matching the signal but increasing its amplitude. Amplifiers use many different methods for converting these electrical signals and have been categorized into classes.
Class A/B: Greater than 50% of the input signal is amplified while the other percentage is “off”. These amplifiers have a small amount of current flowing through the output transistors all the time which almost eliminates crossover distortion. Class A/B has great sound quality but is not as efficient as class D. These amps are most commonly used to drive speakers.
Class D: Also known as switching amplifiers, class D amps have output transistors that are completely turned “on” or “off”. This means that when the transistors are on, there is almost no voltage across them but when they are off there is significant voltage but no current flowing through it which makes these amplifiers very efficient at the cost of sound quality. These amps are most commonly used to drive subwoofers.
Other Classes: You may see classes such as GH, bD, X, FD, etc. by some manufactures. These amplifiers tend to be either class A/B, D or a hybrid of the two but with improvements to their designs that can make them more efficient or offer better sound quality.
The total peak power output is measured as the wattage per channel multiplied by the number of channels, and is calculated at the lowest level of operating impedance.
It is measured during a brief musical burst, such as a sudden drum accent. Some manufacturers display peak power ratings on the face of their products to increase the appeal.
The RMS power rating is more accurate, and we recommend using it for product comparison.
All About Discontinued Portable Bluetooth Speakers
Available in a variety of wattage, colors, shapes and sizes, browse our selection of portable Bluetooth speakers to perfectly compliment your home or office.
Having the ability to wirelessly stream music from your iPhone, iPod or other MP3 device is a fantastic luxury in the technology world. Unwind and connect your music device via Bluetooth to easily play your favorite tunes and playlists without having to worry about tangled, restrictive cords. Most feature a built-in rechargeable battery, allowing you to move from room to room with ease. Bluetooth speakers are perfect for the home and work with nearly all smartphones or music players and even work with devices that aren't Bluetooth-enabled using a standard 3.5mm headphone jack connection.
Providing on-the-go portability for rich, clear sound anywhere, Bluetooth wireless audio profile A2DP supports wireless audio for use with most iPhones, iPads and other Bluetooth enabled devices. Bluetooth speakerphones are perfect for your home or work with nearly all smartphones and even work with music players. As with car technology, many new speakers and home sound systems are coming with built-in Bluetooth for easy wireless streaming. From boom boxes and home speakers to play music throughout your house to PA speakers and karaoke systems, you will be able to find a Bluetooth speaker that fits your needs. Select Bluetooth speakers are available which feature a water resistant design. These speakers are perfect for use as a shower speaker, at the beach and anywhere else where water damage is a concern.
Bluetooth wireless audio profile A2DP (wireless streaming) supports wireless audio for use with iPod, iPhone, iPad and other Bluetooth enabled devices. Select Bluetooth speakers also come with an integrated microphone, allowing you to make and receive phone calls directly from your speaker rather than using your phone. Most portable Bluetooth speakers have a standard Bluetooth range up to about 30 feet so you can enjoy portability in your backyard, kitchen, poolside or anywhere else you can think of. These high-performance speakers will fill your room, office or car with rich, acoustically accurate sound from these compact, wireless speakers.
Unwind and connect your device via Bluetooth to also easily play your favorite tunes and playlists without having to worry about tangled, restrictive cords. Most feature a built-in rechargeable battery, allowing you to move from room to room with ease.
Listen to your favorite song wirelessly with high-end Bluetooth speakers available in different colors, designs and quality. Most Portable Bluetooth Speakers also feature a microphone that turns them into a Speakerphone for the convenience of hands-free talking.
Related Categories in Discontinued Portable Bluetooth Speakers
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