User's Manual

4. XLR Inputs

If your preamplifier has XLR outputs, connect them to the XLR inputs.

The female XLR inputs are wired as follows:

Pin 1 is ground

Rear

Pin 2 is positive (hot)

Panel

Pin 3 is negative (cold)

 

Balanced connections

pass the input signal along two conductors. If there is any external noise and interference 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 Sunfire amplifier.

According to your taste, you may select the current source for electrostatic, planar magnetic or ribbon speakers. Select the voltage source for subwoofers. For cone based systems, use either. For a biwired system, use the current source for midrange 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.

NOTE: The current source output is a voltage source modified to yield a current source impedance of one ohm. This corresponds approximately to a vacuum tube amplifier output impedance and constitutes the dominant factor in the soundstage delivery of classic vacuum tube power amplifiers.

5.Current Source Outputs and6.Voltage Source Outputs

The left and right channels have two sets of outputs. The voltage source output has a source impedance of approximately zero ohms. The current source has a source impedance of approximately one ohm.

The top post of each pair is the positive output, and connects 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.

+

+

-

-

 

Bare Wire

Spade

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.

8. IEC connector

The amplifier comes with a detachable 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 voltage for your model.

9. Line fuse

If this fuse fails, replace it with the exact same “Slow-Blow” type and current rating.

Note: Always unplug the power cord from your AC outlet before removing the fuse cover.

+

-

Dual-Banana

+

-

Banana

Rear Panel Features

13