Description

The TeddyrDacPS  replaces the small wall-wart power supply that comes with the Arcam rDac, and provides significant improvement in sound.

The design is based on the experience gained with the TeddyCap family of power supplies for Naim Audio equipment, and uses the same technology.

Performance

The small power supply which is provided with the rDac is 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 aftermarket 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 TeddyrDacPS 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 TeddySB3 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 TeddySB3 power supply noise level is very close to the zero Volt reference.

Sound

Plug in the TeddyrDacPS and you immediately hear a dramatic reduction in the noise floor, far better bass quality, improved dynamics, sound-stage openness. There is a notable reduction in hardness, edginess in the mid to upper frequency range, tonality is more natural. All this without any loss of musicality, in fact the with the TeddyrDacPS there is a greater sense of musicality!

Interconnects

The TeddyrDacPS 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.