Sunfire TGA-7200(E), TGA-7400(E) manual Biwiring Connections, Unbalanced Preamp Outputs

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CHAPTER 2

Biwiring Connections

If your speakers can be biwired or biamped, they will have completely separate input terminals for the woofer section and the upper range. See the speaker diagram and discussion on page 12.

Make sure that any links be- tween the woofer and upper

range posts are removed from the speakers when

you want to biamp or biwire them. Consult your speaker owner’s manual for details.

The front channels of the Theater Grand Amplifier each have two pairs of outputs which can be used to biwire your speakers. The idea is to use the voltage source to drive the woofer, and the current source to drive the upper range. This will offer improved performance and still allow you to con- nect seven speakers for your Home Theater system.

This page shows the input and out- put connections for Biwiring a left front speaker and a right front speaker.

The remaining speaker connections have been omitted from this drawing for clarity. They can be connected as shown on pages 10 and 11.

Output connections

Connect the amplifier’s right front voltage source output to the right speaker’s woofer input terminals. Connect the amplifier’s right front current source output to the right speaker’s upper range input terminals.

Connect the amplifier’s left front voltage source output to the left speaker’s woofer input terminals. Connect the ampli- fier’s left front current source output to the left speaker’s upper range input terminals.

UNBALANCED

PREAMP OUTPUTS

L

R

 

 

Line-level audio signals

 

From: Preamplifier main RCA outputs

 

To: Amplifier line-level inputs

MINIMUM SPEAKER LOAD

IMPEDANCE 4 OHMS

Speaker-level audio outputs

From: Amplifier outputs

To: Speaker input posts

+ -

+ -

 

 

 

RIGHT

+

-

 

RIGHT

 

TWEETER

+ -

WOOFER

 

 

(CURRENT

LEFT

 

SOURCE)

(VOLTAGE

TWEETER

LEFT

 

SOURCE)

(CURRENT

WOOFER

 

 

SOURCE)

(VOLTAGE

 

 

SOURCE)

 

LOUDSPEAKERS

 

 

 

 

Input connections

Connect your preamplifier’s outputs to the corresponding input jacks on the Theater Grand Amplifier.

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User's Manual

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Contents Seven Important Safety Instructions Contents Introduction TGA-7200 and TGA-7200E Theater Grand EditionsTGA-7400 and TGA-7400E Unpacking InstallationAC Power Considerations CareOverview Front Panel FeaturesPower Switch VDC Trigger Input Rear Panel FeaturesAUTO/ON/OFF Switch RCA InputsCurrent Source Outputs Voltage Source Outputs IEC connectorXLR Inputs Current Source FusesSystem Configurations Unbalanced ConnectionsBalanced Connections SATInput connections BiampingOutput connections Biamping Connections Biamping with an external crossoverBiwiring Connections Unbalanced Preamp OutputsParallel Series and Parallel speaker connectionsSeries Amplifier shuts down often or the line fuse blows often Troubleshooting GuideNo sound from one or more speakers Hum is heard in your speakersTurn-on and turn-off thumps Other causes of noisePoor bass performance Current source outputs not workingSpecifications TGA-7400 TGA-7200Limited Warranty Service AssistanceSeven