Sunfire Classic Vacuum Tube Preamplifier manual

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2 User's Manual Safety Instructions 1. Read Instructions -– All the safety and operation instructions should be read before the Sunfire Component is operated. 2. Retain Instructions — The safety and operating instructions should be kept for future reference. 3. Heed W arnings — All warnings on the Component and in these operating instruc[...]

3 User's Manual 15. T o 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 cou[...]

4 User's Manual Your Classic preamplifier should reach you in perfect condition. If you do notice any shipping damage, please contact your Sunfire Dealer immediately. Gently remove the Classic preamplifier from its packing materials with care, so as to avoid damage to or loss of any packing materials. This is a precision instrument and deserve[...]

5 User's Manual Gain control Power on/off Power on/off Overview Overview The Classic is a preamplifier control center. If you have previous experience with stereo components, you can probably com- plete the input/output connections and make normal use of the basic preamplifier functions without special instructions. We recommend, however, that[...]

6 User's Manual Front Panel Features 1 5 6 7 8 11 10 9 4 2 3 Front Panel Features 4. Remote window This window should be kept clear of obstruction for the remote control to work. 5. Stereo/Mono Switch This sums the left and right inputs so the main outputs will have identical signals. (It does not affect the Tape outputs). The most common use [...]

7 User's Manual Front Panel Features 7. Contour On/Off In the OFF position, the contour circuits are bypassed and the two contour controls (11) will have no effect. In the ON position, the signal frequency response can be adjusted by the contour controls to suit your taste. 8. Input Program Selector This rotary switch selects the program sourc[...]

8 User's Manual TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK DO NOT EXPOSE THIS EQUIPMENT TO RAIN OR MOISTURE. WARNING S/N PASSIVE PRECISION INVERSE RIAA PHONO NETWORK 2 AMP AGC OUTPUTS LINE INPUTS PHONO/LINE INPUTS REPLACE WITH ORIGINAL TYPE AND RATING ONLY 120 VAC 50/60 Hz R L R L R L MAIN 1 MAIN 2 TAPE TAPE AUX VIDEO CD TUNER MOVING COIL MO[...]

9 User's Manual Rear Panel Features 6. T ape output These outputs connect to the inputs of a tape deck for recording the source which is currently selected by the preamplifier. Input jacks on your tape deck may be labeled “ Line In ” , “ Aux ” , or “ Record ” , but do not use “ Microphone. ” It is recommended that DIN-type reco[...]

10 User's Manual Observe the following precautions when choosing a location for your Classic vacuum tube preamplifier: • The Classic is an all-vacuum tube design. It may be operated at any angle, and has modest ventilation requirements. Do not cover the side ventilation slots. • It ’ s location relative to other stereo components is not [...]

11 User's Manual The optional phono stage contains two independent stereo phono preamplifier inputs which are optimized for specific uses. The type of phono cartridge you are using in the turntable will determine which phono input to use. Only a moving coil cartridge should be connected to the moving coil input, or it may become overloaded and[...]

12 User's Manual efforts on the part of the transformer designer are required, and the resulting cost will almost always be many hundreds of dollars. Less expensive transformers will be quiet, but will usually exhibit ringing, phase shift, and some low frequency distortion. The problems with most active step-up devices are simply reversed. Mod[...]

13 User's Manual Phono Connections System Configurations The following pages show some typical connections that you might make in your installa- tion. They show how the inputs and outputs of the Classic preamplifier are connected to various audio components. If your turntable is equipped with a Moving Magnet cartridge, connect its audio output[...]

14 User's Manual CD player Connections The audio output from your CD player can be connected to the preamplifier ’ s CD inputs. If your CD player has variable outputs, this will allow you to adjust the CD player ’ s output volume to match the volume of other components in your system, such as the tape deck or turntable. When you switch fro[...]

15 User's Manual T ape Deck Connections The output from your Tape deck connects to the preamplifier ’ s TAPE inputs. These inputs are only selected by using the preamplifier ’ s Tape Monitor switch. The inputs of your Tape deck connect to the preamplifier ’ s TAPE outputs. These outputs are unaffected by the setting of the volume control[...]

16 User's Manual Amplifier Connections: unbalanced RCA If your amplifier has RCA inputs, you can connect them to the preamplifier ’ s Main 1 or Main 2 outputs. It does not matter which pair you use, because they are identical. Main 2 is provided if you want to run a second amplifier, perhaps to play speakers in another room, or to drive an a[...]

17 User's Manual Amplifier Connections: balanced XLR If your amplifier has XLR inputs, it can be connected to the balanced audio outputs as shown. The balanced connections are preferred, as they provide superior noise cancellation and are less susceptible to interference than unbalanced lines. System Configurations Amplifier[...]

18 User's Manual Phono Inputs RIAA curve Moving Magnet input Gain = 40dB to tape out Overload = 100mV @ 1 kHz. Input Impedance = 47 Ω Noise: better than 82 dB, IHF-A, below 10mVrms at 1 kHz Moving Coil input Gain = 60dB to tape out Overload = 5.60 mV @ 1 kHz. Input Impedance = 470 Ω standard, (setable to 22 Ω , 47 Ω , 150 Ω or 470 ?[...]

19 User's Manual In view of the Classic ’ s input/output flexibility, the many connecting cables to and from the components which may be con- nected to it, and the large number of possibili- ties for mis-set switches both on the Classic and on the various ancillary components operating with it, obviously it is impossible to offer a complete [...]

20 User's Manual Loud howl, squeal, or whistle. • The Tape Monitor switch is engaged while microphones (in the same room as the speakers) are connected to a tape deck for recording. • Put the cat out. Solo voices, or instruments sound thin, shrill or distorted. • Phono cartridge is wired out of phase. Hum Under normal operating condition[...]

21 User's Manual Finally we come to the other common source of hum problems, the signal cables and their associated plugs. Inexpensive cables often have mediocre wrapped shield- ing, so better cables may make an audible difference. And it is important that the plug at each end of every cable makes a good, tight fit in its mating socket. (In th[...]

22 User's Manual Changing the phono stage gain The following gain changes may be performed by experienced electronic techni- cians. Your Sunfire Dealer may be able to recommend a good service/repair shop. Factory set gain of MM Phono is 40 dB. The gain may be changed as follows: 36 dB - change R 11 and R 35 to 3.9 K ohms 40 dB - R 11 and R 35 [...]

23 User's Manual Limited W arranty Sunfire Corporation is proud of its prod- ucts which have been built with care using advanced technology and premium compo- nent 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 Corpo[...]

Manual Part number : 913-012-00 Rev C[...]