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Improving the noise floor of a Delta44 A/D converter
Improving the noise floor of a Delta44 A/D converter

... In a study to evaluate the feasibility of supplying modified Delta 44 soundcards to the amateur radio community I have evaluated several boards and checked how the modifications interact. As it turns out, the decoupling of the 7805 is less critical when the input amplifiers are bypassed. Using 470 m ...
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Home Audio Equipment Measurements

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public address system

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What is Sound

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Introduction to Filters

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The Future of Sound. Made Perfectly Clear.
The Future of Sound. Made Perfectly Clear.

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the product brochure

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IF Alignment - Canadian Vintage Radio Society

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PC Multimedia Speakers

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... experiment on Passive Filters. Passive filters are combination circuits containing only resistors, inductors, and capacitors (RLC). Active filters contain resistance and capacitance plus circuit elements that provide gain, such as transistors or operational amplifiers. The major advantage of active ...
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Introduction to Filters

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DBX 223XL - CSA Indonesia

... back every time you wonder where it’s set). All these switches are on the back panel because it could be disastrous if you were to change them mid-program. On the front panel you’ll notice there are LEDs that indicate whether the unit is in mono or stereo mode. Each channel has an input gain control ...
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... is multiplied by A, the gain of the op amp, to generate the output-voltage source. Any current flowing to the output terminal vo must pass through the output resistance Ro. ...
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Audio crossover



Audio crossovers are a class of electronic filter used in audio applications. Most individual loudspeaker drivers are incapable of covering the entire audio spectrum from low frequencies to high frequencies with acceptable relative volume and absence of distortion so most hi-fi speaker systems use a combination of multiple loudspeaker drivers, each catering to a different frequency band. Crossovers split the audio signal into separate frequency bands that can be separately routed to loudspeakers optimized for those bands.Active crossovers are distinguished from passive crossovers in that they divide the audio signal prior to amplification. Active crossovers come in both digital and analog varieties. Digital active crossovers often include additional signal processing, such as limiting, delay, and equalization.Signal crossovers allow the audio signal to be split into bands that are processed separately before they are mixed together again. Some examples are: multiband dynamics (compression, limiting, de-essing), multiband distortion, bass enhancement, high frequency exciters, and noise reduction such as Dolby A noise reduction.
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