linear power supply for well tempered labs simplex II turntable

All the MCRU linear power supplies are based on a multi award winning 2 box design which provides your equipment with the cleanest mains feed possible.

We do not publish fancy technical papers of paragraphs of jargon (lie our competitors) we simply advise you to try our design and if you cannot hear a difference send it back for a refund. In 9+ years of supplying the world with regulated linear power supplies (with thousands sold) returns can be counted on one hand.

The design is proven and very effective, the final regulation stage is housed in a smaller case which is sited as near to the item being powered as possible, the larger case with the mains components inside can be put next to the equipment or behind the rack. Available in silver or black with a mains power lead to suit your country included the power supply is available in 120V or 230V (you do not need to specify input voltage as we build it to suit your country).

We offer a standard version which  is our most popular design and an up-graded version which has a better fuse installed as well as a Furutech gold plated IEC socket and kimber kable.

The design rationale of our power supplies from designer Nick Gorham…………….

When thinking of regulation, it’s worth remembering the Roman god Janus. Who was the god of gateways, and was a two faced god looking in both directions. Likewise a good voltage regulator is required to look in both directions at once. From one direction you have the mains supply, with the ever increasing noise, distortion and random variation that exists on our household mains supply. In the other direction you have the device you are supplying power to. The load will be asking constantly varying current, and the job of the regulator will be to ignore the varying load and to supply a rock steady voltage that ignores the changing load.

To ask a single regulator to perform both tasks means that it can not do either as well as it could. We don’t ask our regulators to be two faced, we split the two functions into two separate regulators and put them both where they can do the best job.

The first regulator is close to the mains supply, its job is to take the incoming mains and convert it into a low(ish) noise DC supply, and to isolate the mess that is our household power lines from what follows. In most power supplies on the market, the output of the first stage would be directly connected to the load device, and that would certainly be an improvement over the supplies that most manufactures provide. But we can do better by adding the other face of Janus to the system.

The second regulator is supplied with a clean low noise supply, and its job is to handle the changing demands of the load. To do that, it needs to be as close to the load as possible. So we remove the second regulator from the main box, and place it close to the load, both electrically and physically, that removes it from the noise and interference of the mains supply, and allows it to spend its time looking towards the load. Typical commercial voltage regulator chips are general purpose devices, but are not quiet enough for the task on hand, so the second regulator uses a bespoke regulator based on a low noise multi stage filtered voltage reference, a low noise error amplifier and a high current low resistance mosfet. To allow it to handle the changing load it also needs to supply current on demand, so all the remaining space in the second regulator is filled with low impedance capacitors to act as a local energy source.

Using the two stages of regulator, we achieve a noise floor equal or better than most battery supplies, and a effective source resistance of the order of 0.02 ohm (and the short cable run to the load avoids increasing this valve by adding copper where its not needed, and the use of a discrete regulator design allows that tiny value to be maintained way above frequency any audio device operates at.