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The rDacPS power supply powers the Arcam rDac, and provides significant improvement in sound quality.
The design is based on the experience gained with the TeddyCap family of power supplies for Naim Audio equipment, and uses the same technology.
In general, you’ll experience more clarity, tighter bass, more detail, better dynamics, natural voices, better soundstage etc.
Most small power supplies available today are based on a technology called Switch Mode. Using this technology it is possible to create small, efficient, and low cost power supplies. Unfortunately due to their method of operation (high frequency capacitor charging), these power supplies are also very noisy, causing degradation in sound quality. As an alternative, several after market power supplies exist which are usually based on Linear Regulators. These regulators provides an improvement over the original power supply but as can be seen on the graph below are still limited in their performance.
The rDacPS power supply is based on a superior regulator called SuperTeddyReg and provides a significant improvement over linear regulators.
The following graph shows the noise level measurements of the original wall wart power supply (red line), an alternative power supply based on a Liner Regulator (blue line), and the rDacPS power supply (black line). The brown line is a zero Volt reference which is actually the measurement equipment internal noise. As can be seen the rDacPS power supply noise level is very close to the zero Volt reference.
For more information about our power supplies read here...
The rDacPS power supply is equipped with a high quality cable made of silver plated PTFE insulated wires. The cable capacitance is around 13pF/ft, and its resistance is also very low, around 10 milliohm/ft.
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"I only got it hooked up for a few minutes and it was dead cold but already had exactly the impact you would think. Lower noisefloor, blacker backround, better seperation of instruments and more heft and weight to everything. I look forward to getting more time on it."
I hooked up the PS last night and was really impressed with the performance increase immediately. The soundstage was much blacker or darker with the instruments sounds appearing from precise locations within the soundstage. It was heaps of fun to listen to, and if it continues to improve over the next few days, I've got a lot to look forward to.
"The changes between the “with” and “without” are undisputable and introduce changes moving in the direction of the best digital players. Most of all the palpability of the sound improves. Everything is clearer, but without brightening of the sound, without sharpening or contouring. I would even say, that the sound is slightly softer, but in the good meaning of that word, I mean we pay more attention to the music than to the sounds.
This is probably the best way to upgrade a DAC, especially for the given money."
Read the full review: rDac-PS in highfidelity
"So the question is: does it improve the sound of the DAC – and if yes, by how much? In a word - drastically. So much, that return to the standard PSU is simply impossible."