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Sunfire cinema grand Series II, User Manual

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Sunfire cinema grand Series II User Manual Download Page 13

13

User's Manual

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Banana

Spade

Bare Wire

Dual-Banana

Rear Panel Features

6. 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.

7. 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 a switched AC outlet or power strip which is
properly configured for the type of plug and
has the correct voltage for your model. The
AC outlet should be switched, as this will
allow you to turn the amplifier on or off.

8. 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.

4. Voltage Source Outputs and

5. Current Source Outputs

Each channel has 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.

According to your tastes, you may select

the current source for electrostatic, planar
magnetic or ribbon speakers. Select the
voltage source for woofers. For cone based
systems, use either. For a biwired system, try
the current source for midrange and treble
drivers and use the voltage source for the
woofer(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 corre-
sponds approximately to a vacuum tube
amplifier output impedance and constitutes
the dominant factor in the soundstage delivery
of classic vacuum tube power amplifiers.

Summary of Contents for cinema grand Series II

Page 1: ......

Page 2: ...to a power supply only of the type described in these operation instructions or as marked on the Component 9 Power Cord Protection Power supply cords should be routed so that they are not likely to be walked upon or pinched by items placed upon or against them paying particular attention to cords at plugs convenience receptacles and the point where they exit the Component 10 Cleaning The Component...

Page 3: ...ver is applicable limits for radio noise emissions from digital apparatus as set out in the radio interference regulations of the Canadian Department of Communications ATTENTION Le présent appareil numérique n émet pas de bruits radioélectriques dépassant las limites applicables aux appareils numériques de class A de class B selon le cas prescrites dans le règlement sur le brouillage radioélectriq...

Page 4: ...ures 12 13 System configurations 14 Unbalanced inputs voltage source outputs 14 Balanced inputs current source outputs 15 Parallel Mono 16 Biwiring Stereo 17 Biwiring Mono 18 Biamping 19 Speaker connections 20 Troubleshooting guide 21 22 Limited Warranty 23 Service assistance 23 Contents To find out more about this and other Sunfire products please visit our website www sunfire com Table of Conten...

Page 5: ...tandard Edition Standard Edition 325 Watts per channel into 8 Ω 650 Watts per channel into 4 Ω 19 wide chassis Signature Edition 625 Watts per channel into 8 Ω 1250 Watts per channel into 4 Ω 19 wide chassis Bob Carver s signature on the front panel Signature and Standard Editions The illustrations in this manual are of the Signature Edition but the operational details features and connections to ...

Page 6: ...itors are film devices with high dielectric strength and ultra low absorption characteristics An enormous Sunfire power source built around a massive power transformer provides the ultimate muscle for limitless dynamics I could go on and on but here s the best part I ve included two kinds of left and right outputs 1 a standard voltage source i e near zero impedance output for all typical applicati...

Page 7: ... and the box in case your amplifier ever needs to be moved or shipped for repair Make sure that you keep your sales receipt It is the only way to establish the duration of your Limited Warranty and it may come in useful for insurance purposes Please make a note of your serial number located on the rear panel Serial ___________________________ Purchased at ___________________________ ______________...

Page 8: ...ith no more than 0 5 T H D Power at clipping minimum 1250 watts per channel into four ohms 2000 watts per channel into two ohms time limited basis Hum and Noise 103 dB A Weighted Maximum output current 100 amperes peak to peak per channel Maximum output voltage 70 7 Vrms Output impedance Voltage source Approximately zero ohms Current source Approximately one ohm Input impedance RCA inputs 30kΩ Inp...

Page 9: ...nnel into two ohms time limited basis Hum and Noise 100 dB A Weighted Maximum output current 80 amperes peak to peak per channel Maximum output voltage 51 Vrms Output impedance Voltage source Approximately zero ohms Current source Approximately one ohm Input impedance RCA inputs 30kΩ Input sensitivity for rated output Unbalanced 1 8 Vrms Balanced 1 8 Vrms Input impedance XLR inputs 24kΩ each leg b...

Page 10: ... please consider the following Always make sure that your compo nents are all turned OFF before making or changing connections Make sure that the power cords of all your components are attached to the same outlet or at least to the same circuit This will reduce the possibility of a ground loop in the system Make sure that the total current draw does not exceed the current rating of the outlet Use ...

Page 11: ...sing the glass base to prevent the carpet from restricting the airflow If you choose to place the unit on a shelf or other hard surface the base will isolate the amp from vibration and will help make an attractive installation Illumination The meter is illuminated by an incandes cent lamp operating at a very warm color temperature I have been influenced by the scale lighting of classic electronic ...

Page 12: ...tioning preamp is very Rear Panel Features Signature Edition shown Rear Panel Features Rear Panel View small normally less than 5mV If a fault occurs within your preamp and it sends a large DC offset into the Lab Direct inputs of the Sunfire amplifier this could easily damage or destroy your speakers The Lab Direct inputs would pass the DC voltage into the amplifier and the output terminals would ...

Page 13: ...as 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 connect...

Page 14: ...age source outputs connect to the input posts of your speakers The current source can be used instead as shown on the next page The following diagrams show some typical connections that you might make in your installation They show how the inputs and outputs of the Sunfire Amplifier are connected to your preamplifier and speakers System Configurations Unbalanced RCA inputs and voltage source outpu...

Page 15: ... current source output connections If your preamplifier has XLR outputs it can be connected to the XLR inputs as shown This diagram also shows the current source output connections to the speaker inputs The voltage source outputs can be used instead as shown on the previous page System Configurations ...

Page 16: ...of both amplifier channels Never use the voltage source outputs for Parallel Mono as this will may cause overheating distortion and shutdown Connect your preamplifier s right output to the amplifier s right Normal input jack Connect the amplifier s right Lab Direct input to the left Lab Direct input with a short patch cord Alternatively you can use a Y cable to split the preamp output into two one...

Page 17: ...fire Amplifier has two pairs of outputs One 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 compared to conventional wiring Stereo Biwire Connections Connect the amplifier s right voltage source output to the right speaker s woofer input terminals Connect the amplifier s right current source output to the ri...

Page 18: ...t the same amplifier s left current source output to the right speaker s upper range input terminals Connect your preamplifier s right output to the amplifier s right Normal input jack Connect the right Lab Direct input to the left Lab Direct input with a short patch cord Alternatively you can use a Y cable to split the preamp output into two one to feed the left Normal input and one to feed the r...

Page 19: ...over frequency True biamping is very efficient because each amplifier channel only receives and amplifies the range required for its driver For example in the diagram below the right channel only amplifies the low frequencies and the left channel only amplifies the high frequencies Make sure that you adjust the crossover frequency to suit your speakers Check the speaker s specifications An alterna...

Page 20: ...driving a single speaker Parallel For example if you want to parallel connect two speakers to the front right channel of the amplifier The positive output terminal of the front right channel connects to the positive input of the first speaker and to the positive of the second speaker The negative output terminal of the front right channel connects to the negative input of the first speaker and to ...

Page 21: ... Measure all speakers and check their impedance specifications Troubleshooting If you have connected speakers in paral lel the overall impedance may be too low It is recommended that you rearrange the speakers in series to increase the overall impedance thus taking some of the load off the amplifier Make sure that the amplifier has good ventilation and is not overheating Use the crystal base to al...

Page 22: ...ill having a problem remem ber that Sunfire s dealers and technical support staff will assist you Make a list of the things you have tried 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 subwoof ers or let your main speakers play the full range Make sure that the preamplifier has be...

Page 23: ...all not in any event include property or any other incidental or consequential damages which may result from the failure of this product Some states do not allow limitations on how long an implied warranty lasts and or do not allow the exclusion or limitation of incidental or consequential damages so the above limita tions or exclusions may not apply to you This Warranty gives you specific legal r...

Page 24: ...Manual part number 913 042 00 Rev A ...

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