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SETTING UP YOUR TORUS AMPLIFIER
Your Torus Amplifier has the unique ability to be connected to both a Hi-Fi system and an A.V.
processor simultaneously, allowing you to control both the frequency and gain of both
inputs independently, two processors in one amp!
• Connect your Torus Amplifier as shown in Figure 1 or Figure 2. Now attach your Torus
Infrasonic Generator to the Torus Amplifier with a good quality loudspeaker cable as shown
on page 27 in the Torus Infrasonic Generator Manual. Plug the Torus Amplifier into your
mains socket using the supplied cable or another suitable IEC power cable. At this point
have the power switch in the off position.
• Now turn both the high level and low level gains to the minimum position, and the frequency
control to 120Hz. If using the subwoofer out from an AV Processor then you may select the
LFE position. Turn the phase control to position 0º.
• Now switch the power on, and play a track that you are familiar with that has bass content
(If you are using both inputs then start by setting the high level input first using an audio CD
then repeat the setting up procedure on the low level input using a film track).
• Adjust the gain control until the level of the bass from your Torus Infrasonic Generator
matches the level from your main system speakers. Now slowly adjust the frequency control
counter clockwise until the output from the subwoofer meets the lowest notes from your
main speakers (the crossover point), you may need to adjust the gain control again to match
your main system speakers. **
• The Torus Amplifier has a fully adjustable phase control to allow time alignment of the Torus
with the main loudspeakers. Listen to the quality of the bass with the phase in the 0 deg
position and then slowly adjust towards the 180 deg position. Choose the position that
subjectively offers the tightest cleanest bass.
• For further adjustment the Torus Amplifier is equipped with a Parametric Equalizer that
allows you to roll off the output below one of four preset frequencies, these are shown on the
next page. We would recommend initially conducting the above steps with the switches set
to “bypass mode”. When you are more familiar with the Torus system, the Parametric
Equalizer can be engaged if you wish to roll off the lowest frequencies that the Torus is to
operate down to. This function should be engaged if you wish to use more than one Torus
system in a stagger-tuned configuration. This is covered on page 34 of the Infrasonic
Generator manual.
Following these setup instructions will get your Torus System up and running, but with a little
extra invested time and experimentation you will be able to fine tune the Torus setup for
seamless integration with the rest of your system.
** If using the Torus with Wilson Benesch floor standing loudspeakers, we would recommend setting the
crossover frequency at between 38-40Hz as a starting point. For Wilson Benesch stand mounted
loudspeakers we would suggest 48-50Hz. **
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