Also, a first review, which seems to conclude that way:
Upgrade the CDP-9 would be necessary for getting the full performance...http://review.u-audio.com.tw/reviewdetail.asp?reviewid=1408
From Google Translate :
"Power upgrade, not an option, is required
NuPrime CDP-9 there is a place to upgrade, after trying, I almost think it is necessary to upgrade. That is the power. The CDP-9 is so small that it has CDs, a variety of wires, and no room for power at all. Therefore, the CDP-9 is the only one in the 9 Series that uses an external power supply. The original is attached to the ordinary exchange of power supply, although in line with industry standards, but also the Ming Wei such manufacturers products, but the output is still limited, 15V, 1.2A maximum output. I put KECES P8 linear power supply, this unit is dual-output version of this hand, one cut to 15V, the current output is 4A. The KECES P8 uses toroidal transformers, each with its own output ground and low noise levels. The chassis is made of 4mm thick aluminum alloy and isolates EMI / RFI electromagnetic waves. Put on, the sound of the entire triple jump, not only sound density is more solid, more full thickness, the ups and downs of music and contrast more intense, music dynamic more prominent, and the background is more quiet. Orchestration of large orchestration, whether it is subtle lines in the show, or a large dynamic when the energy sense, are more prominent; and large volume, the dynamic section is more calm and organized. Listen to the difference between the drums even bigger, it seems that the original weight of 200 pounds, plus P8, at least 300 pounds or more, and retractable faster and more neat. Just listen to Dali CD 4 again this album will understand, if you do not understand, put a Michael Jackson, Bao Zhisisha to. In fact, the original design of the CDP-9 should have a separate power supply, NuPrime do not understand the power design, but this way, the price is not so cheap. If you are hesitant to consider audiobooks, please inform the store in advance, prepare a power supply for you, I am afraid you listen to CDP-9 also No commitment to pay, after listening to the power of the sound after the upgrade, it was frozen. "