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2. Plasma speaker - Wikipedia

   en.wikipedia.org/wiki/Plasma_speaker

   The ExcelPhysics variant used a flyback transformer to step up voltage, a 555 timing chip to provide modulation and a 44 kHz carrier signal, and an audio amplifier. The kit is no longer marketed. [10] A flame speaker uses a modulated flame for the driver and

3. Dynaco - Wikipedia

   en.wikipedia.org/wiki/Dynaco

   A smaller tube amplifier, the 17.5wpc Stereo 35, was introduced in 1963, and was followed the next year by the SCA 35, the company's first integrated (preamp + power amp) tube amplifier. In 1992, an updated version of the Stereo 70, the Stereo 70 II , was produced by Sound Valves for Panor Corporation.

4. Loudspeaker enclosure - Wikipedia

   en.wikipedia.org/wiki/Loudspeaker_enclosure

   Speaker enclosures are used in homes in stereo systems, home cinema systems, televisions, boom boxes and many other audio appliances. Small speaker enclosures are used in car stereo systems. Speaker cabinets are key components of a number of commercial applications, including sound reinforcement systems, movie theatre sound systems and ...

5. Preamplifier - Wikipedia

   en.wikipedia.org/wiki/Preamplifier

   An example of a typical high-end stereo preamplifier. A preamplifier, also known as a preamp, is an electronic amplifier that converts a weak electrical signal into an output signal strong enough to be noise-tolerant and strong enough for further processing, or for sending to a power amplifier and a loudspeaker. [1]

6. PS Audio - Wikipedia

   en.wikipedia.org/wiki/PS_Audio

   PS audio offered the PCA II preamplifier. This was discontinued and replaced with the GCP-200 preamplifier. Each had an optional phono stage and external power supply option. For amplifiers, PS audio offered the HCA-2 "digital" amplifier. This was a switching amplifier (many would call this a Class D Amplifier) that provide about 150 watts per ...

7. AOL

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   Log in to your AOL account to access email, news, weather, and more.

8. Amplifier - Wikipedia

   en.wikipedia.org/wiki/Amplifier

   An audio amplifier amplifies audio frequencies. This category subdivides into small signal amplification, and power amps that are optimised to driving speakers , sometimes with multiple amps grouped together as separate or bridgeable channels to accommodate different audio reproduction requirements.

9. Remove Banner Ads with Ad-Free AOL Mail | AOL Products

   www.aol.com/products/utilities/ad-free-mail

   SYSTEM REQUIREMENTS. Mobile and desktop browsers: Works best with the latest version of Chrome, Edge, FireFox and Safari. Windows: Windows 7 and newer Mac: MacOS X and newer Note: Ad-Free AOL Mail ...