Sunfire TGA-5400(E) XLR Inputs, Current Source Outputs Voltage Source Outputs, IEC connector

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 surround channels have Voltage Source outputs only.

The Voltage Source outputs have

asource 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 (red) post of your speaker. The bottom post of each pair is the negative, and connects to the negative (black) post of your speaker. The posts can accept bare wire, spade terminals, and dual or single banana connectors.

+	+
-	-

CHAPTER 1

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 in-line fuse to protect your speakers. If one ever opens, there will be no output to that speaker.

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. AC Line fuse

Bare Wire Spade

+ - Dual-Banana + - Banana

According to your musical taste, you may select the Current Source for driving electrostatic, planar magnetic or ribbon speakers. Select the Volt- age Source for driving subwoofers. For cone based systems, use either. For a biwired system, use the Current Source for midrange and treble driv- ers, and use the Voltage Source for the subwoofer(s). These are sugges- tions only. By all means, please feel free to experiment with other wiring options. (See page 14.)

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.

With a flat ended screwdriver, push the fuse carrier in slightly and turn it counter-clockwise to release.

9

User's Manual