Frequently Asked Questions

How do I select the right Torus for my system?  

Here is a general guideline: High end audio and video systems can benefit the most from using RM 15 or RM 20 models. The RM 15 allows the maximum amount of current possible to be withdrawn on an instantaneous basis from a standard wall plug – 15 Amps. The RM 20 requires a dedicated circuit, and will enable up to 20 Amps to be drawn. The RM 10 rated for 10 Amps is usually perfect for most mid-power audio and video systems (up to 200 watts per channel typically). Here is a slightly more technical guideline. Total the nominal current draw of the equipment to be powered via the Torus unit. Select a Torus Power unit which has current capability equal or marginally higher. For example, if the total nominal current of connected equipment is 9A choose RM 10, if 19A choose RM 20. Torus Power devices drawing lower currents can be utilized; however the full dynamic benefits of the Torus Power will not be realized. See Torus Product Selection Chart for more information.

What is the benefit of using 240 Volt Balanced Input, bearing in mind I will need to have an electrician install a dedicated 240V line?

The use of 240 Volt Balanced allows the Torus unit to draw half the output current from the power source. For example: the RM 20 BAL will provide 20A at the outlets to feed the connected equipment, but will only draw 10A from the 240 Volt balanced input source. As a result you get double the power, for a given current value, compared to the 120V power source. The RM 45, RM 60, RM 75 and RM 100 models allow the largest power systems to operate conveniently from a single piece of reliable equipment.

Are the zones isolated from each other on the RM60 and RM100 units? Why are there switches?  

The Zones on RM 45, RM 60, RM 75 and RM 100 are each controlled for the maximum nominal safe current drawn by either a 16A or a 20A circuit breaker, depending on the type of the duplex medical grade outlets used. However, every single outlet of every zone has access to the total available dynamic power of the whole unit. This means that all the zones are being fed from the same main output branch and are NOT isolated from each other

Is it recommended to leave the Torus Power unit on at all times? or is it preferable to turn it off whenever I turn off the equipment plugged into it?

It is preferable to leave the Torus Power unit on whenever you turn off the equipment plugged into it. Standby current draw is low. However, if the Torus Power unit is not going to be used for an extended period, it is best to switch off the unit

Is there a preferred sequence of plugging in equipment, e.g. analog sources closest to the power cord, then digital sources, then amplifiers (this sequence is recommended by some manufacturers)?

There is no preferred sequence of plugging in equipment to the Torus unit. Full Torus Power benefits are available through all outlets to every connected component. However, it is recommended to switch on different equipment one at a time and not all at the same time

Can you give a technical explanation of how the Torus transformer works to attenuate electrical noise, as well as reducing acoustic noise (to keep the unit silent)?

The low pass filter characteristic of the Torus device is achieved in the toroidal transformer through the control of the leakage inductance and interwinding capacitances, combined with the proper choice of core material and careful design parameters. Torus Power transformers perform as a low pass filter with 12db/octave noise attenuation typically starting at 2kHz. Attenuation is 12db at 20,000Hz; 24db at 200,000Hz, and ~ 36 to 40 db at 500,000Hz. Beyond 500kHz, the attenuation reduces due to the increased influence of interwinding capacitances. Attenuation of noise levels of around 20db in the 2MHz frequency range. Plitron's proprietary LONO technology is used to maintain the acoustic noise level below audibility. There is no gapping to the core, as the gapping itself would result in noise generation. The cores also have not been vacuum varnished, as varnishing effects the B-H characteristics of the core in a non predictable manner. See also How Torus Restores Incoming Mains for more information.