Our review:Item Description:Music lovers rejoice! Those looking for the ultimate in CD playback from an audiophile-grade component will be impressed with a high precision, multi-bit D/A converter and 128 x over sampling. Others looking for convenience will thrill at the sight of 6-disc capability, 6 repeat modes, 40 track programming - and no worries about interruptions to your music, with the ability to change 5 discs while the last one is still playing. All will marvel at the crystal-clear playback, enhanced by Onkyo exclusive VLSC (Vector Linear Shaping Circuitry), for a smoother sounding audio signal. Just as crucial to your sonic enjoyment is Direct Digital Path, a heavily shielded, high-quality cable that protects the delicate audio signal from noise emitted by the surrounding circuits. Housed in a sturdy chassis graced with a brushed aluminum front panel, the DX-C390 is ready to provide hours of uninterrupted music - for the soundtrack to your life.
From the Manufacturer:Music lovers rejoice! Those looking for the ultimate in CD playback from an audiophile-grade component will be impressed with a high-precision, multi-bit D/A converter and 128 x oversampling. Others looking for convenience will thrill at the sight of 6-disc capability, 6 repeat modes, 40 track programming—and no worries about interruptions to your music, with the ability to change 5 discs while the last one is still playing. All will marvel at the crystal-clear playback, enhanced by our exclusive VLSC (Vector Linear Shaping Circuitry), for a smoother sounding audio signal. Just as crucial to your sonic enjoyment is Direct Digital Path, a heavily shielded, high-quality cable that protects the delicate audio signal from noise emitted by the surrounding circuits. Housed in a sturdy chassis graced with a brushed aluminum front panel, the DX-C390 is ready to provide hours of uninterrupted music—for the soundtrack to your life.
Key Technology Features: 192 kHz/24bit AD Converters: Costly, extremely powerful digital-to-analog converters , that not only boast a dynamic range of 120 dB, they process information faster and are virtually resistant to clock jitter, to ensure the best possible performance from DVD-Audio, DVD-Video and audio CD.
RI (Remote Interactive): With Onkyo’s exclusive RI (Remote Interactive) system capability, you can integrate and operate all compatible components through a single remote control. What’s more, RI capability enables you to simply connect the iPod® to your receiver through Onkyo’s RI Dock for the iPod (DS-A1). Your iPod effectively becomes another Onkyo component from which you can relish a fuller sound that just can’t be experienced through headphones. RI capability will also give you remote operability of your iPod for hands-off control over your digital music.
VLSC (Vector Linear Shaping Circuitry): Conventional D/A conversion methods reduce digital pulse noise at the conversion stage but can’t remove it completely. Previously only found on our high-end components, VLSC (Vector Linear Shaping Circuitry) employs a unique D/A conversion circuit to overcome this problem. Data is converted between sampling points and these points are joined with analog vectors in real-time to produce a smooth output wave form. The result — a virtually noiseless, smooth analog signal based on the digital source to bring out even the most subtle of nuances in your music, movie soundtracks and even MP3s.
MP3 Playback: This audio format achieves about a 10:1 compression over conventional CD audio. What does this mean? You can store many more songs using the same amount of space. For example, a standard 650MB CD can hold more than 200 songs in MP3 format. Various bitrates allow for higher or lower quality, depending on the desired sound quality of the final recording.
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Buyer Testimonials
Average Buyer's Review:

Buyer's review: 
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Good value
Well satisfied after one month. I wish that markings on front of unit were a little more readable, same for the remote,even if it means making it a little larger. bt
Buyer's review: 
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there's better players out there...!
My Onkyo only lasted about 18 months before dying(i.e not playing cds correctly). 18 months! sheesh!
The one best feature is that it plays mp3s.
It's drawbacks:
1. It takes about 20 seconds to power up before you can insert a cd.
2. The rewind/ fastforward ONLY works by using the REMOTE ,and not on the machine itself, and works poorly.
When this thing finally started dying, it would play 10 seconds of a cd, then skip to the next, play 10 seconds of THAT cd, move on,,etc
I was happier with my old Sony.
Buyer's review: 
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Reliable 6 CD tray!
I've given this poor machine intensive, 16/24 hs usage since I bought it, and I only had to take it to the repair shop once. The laser broke down, repair wasn't cheap, but I suppose it happens with all brands. Thus, I don't take any "stars" for that.
Support for not very well known brands (in the developing world) like Onkyo is absent, but thankfully Sony services can fix them properly. "Made in Japan" :)!
I like the fact of being able to change most CDs while listening, the sound quality is grea, maybe the opening slot for the CD tray could have a tighter door for not letting any dust in, but, as usual, Onkyo just delivers.
The RCA connections made some noise some time ago, it just ruined everything... After hours of tampering and changing of amplifier, cables, speakers, I made sure it was it, opened it (there's not much to be seen), then handmade some "guide" for the cable not bending and voila, the noise went away.
I'm sure it would have taken less time for a tech-savy user, but it did break some "romantic moments"... That's why I took 1 star.
Buyer's review: 
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A Good CD Player at a Good Price
The product was delivered as advertised - with manual and (unused) remote. The changer works flawlessly and the unit offers surprisingly good sound for the price - even better than the more expensive 1-disk unit it replaced. Works equally well with commercial and computer-made CDs. Two very small caveats: (1) it's big (though smaller than others in its price range) and barely fits into my cabinet (I had to loosen the rear cover to keep the cables from being crushed against the back) - measure first (or cut a hole in the back)! (2) the control buttons are well placed but it's hard to read their small labels to operate the unit (fortunately, the bottons are easy to memorize). I highly recommend this unit.
Buyer's review: 
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CD Changer
I was looking for a CD changer that was moderately priced but high quality. I've only had this for a month but so far but I think I found what I was looking for. I would definitely recommend this product.