Onkyo CS 420 User Manual

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CS 420  
CD RECEIVER SYSTEM  
Quality Audio Playback with a Sense of Convenience and Versatility  
Here’s an integrated audio system that will more than adequately handle the wide-ranging frequencies of your music, including CDs, MP3s  
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or radio signals. And if you’re already actively buying and storing MP3 files, teaming the CS 420 CD receiver system with the iPod through  
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the RI Dock DS A1 for the iPod is an attractive option for bringing superior audio fidelity to your MP3s. The CS 420 uses Onkyo’s time-tested  
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WRAT Wide Range Amplifier Technology , Optimum Gain Volume Circuitry and discrete output stage circuitry to ensure that incoming audio  
signals are output with a quality befitting that of larger systems. Also, the accompanying speakers incorporate Onkyo speaker developments  
designed to deliver a sound with clarity and purpose. These speakers are further enhanced by a high-gloss piano finish that nicely complements  
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the elegant aluminum front panel of the CD receiver. Stylish, graceful with compelling sound quality—the CS 420 CD receiver system is a  
welcome addition to any home.  
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WRAT Wide Range Amplifier Technology  
iPod Playback through Onkyo’s RI Remote Interactive System Capability  
Originally developed for our high-end A/V receivers, WRAT is a collection of  
Onkyo’s proprietary technologies that achieves three fundamental goals in  
the pursuit of superior audio:  
With Onkyo’s RI system capabilities, you can add other Onkyo components to  
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the CS 420 and operate them through one single remote control. RI capability  
also gives you the opportunity to integrate the iPod with your CD receiver system  
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1 Wider frequency response;  
through Onkyo’s RI Dock for the iPod DS A1 . Simply connect the dock to  
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2 Reduced amplifier distortion at high volume;  
the CS 420, place your iPod in the dock and relish the fuller sound that just  
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3 Better control of current and electro/mechanical kick-back from speakers.  
can’t be experienced through headphones. RI capability also gives you remote  
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By incorporating WRAT into the CS 420 ensures that you’ll get audio playback  
operability over your iPod for hands-off control over your digital music. The DS A1  
quality from your MP3s and CDs that just isn’t possible from poorly conceived  
audio components.  
is compatible with most iPod models, and will also accommodate the latest  
iPod releases.  
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Optimum Gain Volume Circuitry  
2 Way, Bass Reflex Speakers Incorporating Onkyo’s Own  
Speaker Developments  
Designed to neatly complement the CD receiver in any room of the home,  
Conventional volume attenuation methods must initially drop a signal close to  
the noise floor at low volumes. Even though the signal is only tainted with a little  
noise, the amount increases when the signal is amplified. Onkyo’s Optimum Gain  
Volume Circuitry adjusts the gain so that less than half the amount of attenuation  
is necessary. The signal never comes close to the noise floor, and thereby  
eliminates the possibility of noise contamination that plagues conventional volume  
attenuation methods.  
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the CS 420’s 2 way, bass reflex speakers are designed to playback music with  
no interference and maximum efficiency. The Advanced Onkyo Microfiber  
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A OMF diaphragm woofer is made from a three-layer construction that absorbs  
vibrations that can adversely affect the quality of the emitted sound. This thin  
yet rigid diaphragm enables an extremely fast and accurate response—essential  
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for the reproduction of quality audio. Also, a V Line Edge on the suspension  
Discrete Output Stage Circuitry  
It is all too common for manufacturers of mini systems to employ just one circuit  
at the output stage. With multiple transistors crammed onto this single circuit,  
suppresses any extraneous vibrations that can cause the sound to deteriorate  
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significantly. Capping it off, an Aero Acoustic Drive slit duct has been included  
to reproduce a sound that is both responsive and spacious it its delivery.  
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excess heat is generated and the audio signal is compromised. The CS 420  
is different. It uses discrete amplifier technology similar to that found on our  
high-end receivers. Keeping the transistors separate at the output stage enhances  
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cooling, so the CS 420’s longevity is extended and interference to the audio  
signal is reduced.  

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