Directed Audio A404, A502 owner manual Crossover Settings and Gain Adjustment

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CROSSOVER SETTINGS AND GAIN ADJUSTMENT

Your Directed Audio power amplifier needs to be adjusted carefully to achieve maximum performance. These are some guidelines to follow when fine-tuning the amplifier.

„For full-range and simultaneous stereo/mono bass applications, the crossover selection switch should be set to FLAT. If the amplifier is driving your subwoofers, set the switch to LPF, and for mid-bass/midrange output, set to HPF.

„The gain adjustment allows you to set proper signal match for clean, quiet ampli- fier operation. For full-range and simultaneous stereo/mono bass applications, start by playing some music you are familiar with. With the gain adjustment on the amplifier in the middle of its rotation, bring up the volume on your head unit to the 3/4 volume setting or until you start to hear distortion or clipping. If you hear distortion before you reach the 3/4 volume setting of your head unit, reduce the gain setting on the amplifier and start to raise the head unit volume again. When you can listen to the music at or slightly above 3/4 on your head unit without audible distortion, slowly raise the gain of the amplifier until distortion is heard, then back off the gain until the distortion is not audible. This setting will allow you to reach full output with all but the quietest of source material, while avoiding excessive noise in the system.

„The same procedure should be used for adjusting the amplifier when the on-board crossover is set to LPF or HPF, but you will also have to take into consideration the effect that gain adjustment has on system frequency response and imaging. Again, plan on spending some time with music that you know, getting the gain and crossover settings the way you like. Test discs and analyzers may help with this process, but in the end it's your ears that count - listen to the music!

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© 2004 Directed Electronics, Inc

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Contents A502 A404 Table of Contents CongratulationsLimited TWO-YEAR Consumer Warranty Features „ Selectable 12dB/octave two-way crossoverInstallation Guidelines Directed Electronics, Inc Front Panel CONNECTIONS/CONTROLS A502-A404 Frequencies and is used for subwoofers speakersRear Panel Connections Amplifier Connections A404 FrontFactory ground points Speaker Wiring Diagrams A502 Speaker Wiring Diagrams A404 Stereo Operation 2 Channel top viewStereo Operation 4 Channel top view Channel Stereo with Mono Sub top view Crossover Settings and Gain Adjustment LED Tube Installation Optional Directed Amplifier-VARAD Cross Reference ChartCEA Specifications Specifications Bridged 4 OhmDirected Electronics, Inc Vista, California

A404, A502 specifications

Directed Audio, a pioneer in the car audio industry, has garnered attention with its innovative models like the A502 and A404. These two amplifiers showcase a blend of power, clarity, and advanced technology, aimed at enhancing the in-car audio experience for enthusiasts and casual listeners alike.

The Directed Audio A502 is a two-channel amplifier that delivers impressive performance with 50 watts RMS per channel at 4 ohms, offering a punchy sound without sacrificing fidelity. It features a high and low-pass crossover, allowing users to tailor their audio output to their specific setup, whether they're driving high-frequency speakers or deep bass subwoofers. The A502 is built with a sleek aluminum chassis that not only provides durability but also enhances the heat dissipation, ensuring reliable performance during extended use. The amplifier's compact size makes it an excellent choice for various vehicle installations, fitting effortlessly in tight spaces without compromising on sound quality.

On the other hand, the Directed Audio A404 is a four-channel amplifier designed for those looking to elevate their audio system further. It boasts 50 watts RMS per channel at 4 ohms and can be bridged to power subwoofers with 100 watts RMS at 4 ohms. This versatility makes the A404 a perfect match for full-range speakers and subwoofer combinations, enabling users to build a comprehensive audio system tailored to their listening preferences. Similar to the A502, the A404 includes selectable high and low-pass filters, expanding its adaptability.

Both models leverage Class D amplification technology, ensuring efficient power usage that results in less heat generation compared to traditional Class A/B amplifiers. This efficiency not only enhances performance but also contributes to a longer lifespan for both the amplifier and the audio components connected to it. Moreover, Directed Audio amplifiers come equipped with short circuit and thermal protection circuitry, safeguarding against potential damages during operation.

In terms of design, both amplifiers reflect a modern aesthetic with their clean lines and a minimalist profile. Their easy-to-read terminals and layout simplify installation, making them accessible for DIY enthusiasts. With a reputation built on quality and performance, Directed Audio A502 and A404 stand out in the competitive landscape of car audio, catering to diverse needs while delivering exceptional sound quality that transforms any driving experience into a remarkable audio journey.
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