Theater Grand Amplifier TGA-7400 / TGA-7400(E) and TGA-7200 / TGA-7200(E) seven
SAFETY Important Safety Instructions 1. Read Instructions 2. Keep these Instructions 3. Heed all Warnings. 4. Follow all Instructions 5. Do not use this apparatus near water. 6. Clean only with dry cloth. 7. Do not install near any heat sources such as radiators, heat registers, stoves, or other apparatus (including amplifiers) that produce heat. 8. Unplug this apparatus during lightning storms or when unused for long periods of time. 9. Refer all servicing to qualified service personnel.
SAFETY 16. To prevent electric shock, do not use this polarized plug with an extension cord, receptacle or other outlet unless the blades can be fully inserted to prevent blade exposure. Pour préevenir les chocs électriques ne pas utiliser cette fiche polariseé avec un prolongateur, un prise de courant ou une autre sortie de courant, sauf si les lames peuvent être insérées à fond sans laisser aucune parIIIe à découvert. 17.
CHAPTER 1 Introduction Bob Carver, Amplifier Designer, Physicist Dear Friend, Thank you for purchasing a Sunfire Theater Grand Amplifier. We hope you enjoy it and the music it makes as much as we have enjoyed creating it for you. The TGA-7400 can produce 400 watts rms per channel into 8 ohms and 800 watts rms into 4 ohms. The TGA-7200 can produce 200 watts rms per channel into 8 ohms, and 400 watts rms into 4 ohms.
CHAPTER 1 Theater Grand Editions The Theater Grand seven channel power amplifier is available in two editions: • TGA-7400 • TGA-7200 TGA-7400 and TGA-7400(E) 400 Watts per channel into 8 Ω 800 Watts per channel into 4 Ω The TGA-7400 has twice the power output, and uses heavier output terminals compared to the TGA-7200. This manual uses illustrations of the TGA-7400. The operational details, features, and connections to loudspeakers and preamplifiers are the same for both models.
CHAPTER 1 Unpacking Installation Your Sunfire Amplifier should reach you in perfect condition. If you do notice any shipping damage, please contact your Sunfire Dealer immediately. Read and follow all safety instructions shown on pages 2 and 3. Gently lift out the unit and remove all the packing material and accessories. It is important to save all the packing materials and the box in case your amplifier ever needs to be moved or shipped for repair. Make sure that you keep your sales receipt.
CHAPTER 1 Front Panel Features Overview Power Switch Your Theater Grand Amplifier has seven channels of power amplification combined in one chassis for the purpose of reproducing music or video soundtracks. It accepts line level signals from a controlling preamplifier and amplifies them to a higher level, suitable for driving powerful stereo and Home Theater speakers. Press the power switch to turn the amplifier on.
CHAPTER 1 Rear Panel Features 1 2 3 4 5 6 6 5 6 MINIMUM SPEAKER LOAD IMPEDANCE 4 OHMS 7 6 1. AUTO/ON/OFF Switch 2. 12 VDC Trigger Input Your Theater Grand Amplifier is designed with an automatic on/off circuit. Although the AUTO-ON signal sensing turn-on is adequate for most installations, the 12 VDC trigger inputs are offered as an optional way to turn on the amplifier.
CHAPTER 1 4. XLR Inputs If your preamplifier has XLR outputs, connect them to these XLR inputs. These balanced connections offer superior noise rejection compared 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.
CHAPTER 2 System Configurations The following pages show some typical connections that you might make in your installation. They show how the inputs and outputs of the Theater Grand Amplifier are connected to your preamplifier and speakers.
CHAPTER 2 Balanced Connections If your preamplifier has XLR outputs, it can be connected to the XLR inputs as shown. This example shows the connections to the Sunfire Theater Grand Processor TGP-5. This also shows the Current Source output connections to the front left and right speaker inputs. (The Voltage Source outputs can be used instead, as shown on the previous page.) Sunfire Theater Grand Processor TGP-5 MANUFACTURED UNDER LICENSE FROM DOLBY LABORA "DOLBY", "PRO-LO TORIES.
CHAPTER 2 Biamping If your speakers can be biamped, the Theater Grand Amplifier can be configured to provide a very powerful system. The following connections are shown in the diagram on the top half of the next page. Output connections • Connect the amplifier’s right rear 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. If you prefer, you could use the right front voltage source instead.
CHAPTER 2 Biamping Connections UNBALANC ED PREAMP OU TPUTS L R Note: The remaining channels can be used to drive other speakers, or left unconnected. These connections have been omitted from this drawing and the one below for clarity. They can be connected as shown on pages 10 and 11.
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. UNBALANC ED PREAMP OU TPUTS L R Make sure that any links between 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.
APPENDIX Series and Parallel speaker connections The connection of more than one speaker per channel will tend to degrade the speaker’s frequency response, and may make the amplifier run hot. For the best results use one speaker per channel. Parallel For example, if you want to parallelconnect two speakers to the front right channel of the amplifier: If you do want to connect more than one speaker per channel, there are two main ways: Series or Parallel.
APPENDIX Troubleshooting Guide The Sunfire Amplifier is expertly designed and built to provide years of trouble-free performance. Most problems that occur can usually be solved by checking your setup or making sure that the audio and video components connected to your processor are on and fully operational. The following information will help you deal with common setup problems you may experience during normal use of your unit.
APPENDIX • Check that the interconnect cables to the amplifier do not have any broken connections. Poor bass performance • Make sure that your preamp does not have the bass level turned down. • Many surround preamplifiers have controls which can direct all the bass to subwoofers, or let your main speakers play the full range. Make sure that the preamplifier has been correctly set. If you are not using a subwoofer, set the speaker options to “LARGE,” and the subwoofer to "OFF.
APPENDIX Specifications TGA-7400 Power output 400 watts continuous, per channel, into eight ohms, at 1 kHz with no more than 0.5% T.H.D. Power at clipping, min 800 watts per channel into four ohms. Hum and Noise -118 dB, A-Weighted Maximum output current 120 amps peak to peak per ch. Maximum output voltage 56.6 Vrms Output impedance Front Left and Right channels Voltage source: Approx. zero ohms Current source: Approx.
APPENDIX Limited Warranty Sunfire Corporation is proud of its products which have been built with care using advanced technology and premium component parts. Your unit has been crafted to perform properly for many years. Sunfire Corporation offers the following Warranty to you, the owner of a new Sunfire product: The Sunfire Corporation Warranty for the Theater Grand Amplifier is in effect for FIVE years from the date of original retail purchase.
MINIMUM SPEA KER LOAD IMPEDANC E 4 OHMS Theater Grand Amplifier TGA-7400 / TGA-7400(E) and TGA-7200 / TGA-7200(E) seven Manual part number : 913-135-00 Rev A
