4. XLR Inputs
If your preamplifier has XLR outputs, connect them to these XLR inputs. These balanced connections offer superior noise rejection com- pared to the unbalanced RCA inputs, particularly for long cable runs.
The female XLR inputs are wired as follows:
Pin 1 is ground
Pin 2 is positive (hot)
Pin 3 is negative (cold)
Balanced connections pass the input signal along two conductors. If there is any external noise and inter- ference passing into the audio lines, both conductors will receive the same amount of noise. This noise is then rejected in the balanced input stage of the Theater Grand Amplifier.
5.Current Source Outputs and:
6.Voltage Source Outputs
The front left and front right chan- nels each have a Voltage Source output and a Current Source output. The remaining channels have Voltage Source outputs only.
The Voltage Source outputs have a source impedance of approximately zero ohms. The Current Source outputs have a source impedance of approximately one ohm.
The top post of each binding post pair is the positive output, and con- nects to the positive post of your speaker. The bottom post of each pair is the negative, and connects to the negative post of your speaker. The posts can accept bare wire, spade terminals, and dual or single banana connectors.
According to your musical taste, you may select the Current Source for driving electrostatic, planar magnetic or ribbon speakers. For cone based systems, use either. For a biwired sys- tem, use the Current Source for mid- range and treble drivers, and use the Voltage Source for the subwoofer(s). These are suggestions only. By all means, please feel free to experiment with other wiring options. (See page 14.)
NOTE: The Current Source output is a Voltage Source modified to yield an impedance of one ohm. This cor- responds approximately to a vacuum tube amplifier's output impedance and constitutes the dominant factor in the soundstage delivery of classic vacuum tube power amplifiers.
7. Current Source Fuses
Each Current Source output has an
Unplug the amplifier from the AC mains power supply if you ever have to change
afuse.
8.IEC connector
The amplifier comes with a detach- able Linecord which attaches here. Make sure it is firmly pushed in place. Connect the other end to an AC outlet which is properly configured for the type of plug and has the correct volt- age for your model.
9. Power Switch
Press the top edge of this power switch to turn the amplifier on. The power LED will turn blue.
The auto/on/off switch (1) controls how the amplifier turns on (signal sensing, 12V trigger, etc.).
CHAPTER 1
10. AC Line fuse
If this fuse fails, replace it with the exact same type and current rating.
Note: Always unplug the power cord from your AC outlet before removing the fuse.
Gently turn the fuse carrier counter- clockwise to release the fuse.
11. LED Dimmer
This switch allows you to set the brightness of the front panel power LED, from low, medium and high. Ad- just this to match the brightness of the other components in your system.
User's Manual
