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3. Make sure your amplifier is properly connected to a high-current power receptacle. 

4.  When turning the unit on, make sure the volume control is at its lowest point (the volume control is at minimum 
when turned counterclockwise to the mechanical limit). 

5.  The amplifier will be fully functional after only a couple of minutes. However, as it warms up over the first 30 
minutes of operation you may notice slight improvement in the sound quality. 

6.  At the end of your listening session make sure to turn the amplifier off. Leaving it on does nothing for sound 
quality and it reduces life of the vacuum tubes. 

The amplifier should always be turned on and off via its own power on-off switch.  

 

Controls and Their Functions  

 

Front Panel 

Selector Switch

 – 

The three position selector switch can be u

sed to select the active audio source. 

Volume control

 - 

This control is used to adjust the output volume level. Turning the control knob clockwise 

increases the sound level and turning it counterclockwise decreases the sound level. 

 

Back Panel 

Power Switch

Press the power switch to (I) turn the power on. Within 10-20 seconds, as the heaters 

reach operating temperature the tubes will begin to glow a soft orange light. Press the power switch to (0) 
to turn the unit off. As the heaters cool off, the orange glow will slowly disappear.

 

 

It is normal for a vacuum tube equipment to run warm if used for prolonged periods. Tubes are 
operating at much higher temperature and should not be touched for at least ten minutes after the unit 
is turned off to prevent burns. Always place your amplifier away from children and pets to prevent 
burns. 

 

 

Audio signal connection jacks

 

-

 

Use these jacks to connect the audio interconnects from your 

components to the amplifier. 

 

Speaker terminals -

  Your amplifier has two output channels, the Right Output and the Left 

Output. Each output channel is designed to handle one speaker. Follow the instructions outlined in the 
Operating Procedure for the correct speaker connections.

 

 

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Содержание i84

Страница 1: ... ahead a brand of ENG Vista Inc m mo od de el l i i8 84 4 I In nt te eg gr ra at te ed d T Tu ub be e A Am mp pl li if fi ie er r U Us se er r s s M Ma an nu ua al l 500 0010MR2 http www vista audio com Rev 2 1 ...

Страница 2: ...part of your audio system Before using this amplifier please take the time to carefully read and understand the safety instructions and operating procedures Becoming familiar with all details about your amplifier will ensure safe usage and reliable operation Especially important is the section on tube layout which gives information on tube replacement The effort you invest now will be well rewarde...

Страница 3: ...onnector Always use power cord with adequate wire cross section and an electrical outlet that is grounded If you do not know whether the outlet is grounded consult your electrician or local power company 6 Power Cord Protection Power supply cords should be routed so that they are not likely to be walked on or pinched Pay particular attention to cords at plugs convenience receptacles and where they...

Страница 4: ...he wall outlet before cleaning Do not use liquid cleaners or aerosol cleaners Use a dry cloth for cleaning Do not use any type of abrasive pad scouring powder or solvent such as alcohol or benzene 2 Tube replacement Electron tubes have their life in the 1000 2000 hrs range We strongly recommend replacing the output tubes at 12 18 months interval depending on your listening habits and signal tubes ...

Страница 5: ...ould make certain the unit is disconnected from the AC outlet and that the tube has cooled down Inspect the tube for cracks and physical damage Make sure that the pins are straight If you need to straighten the pins be very careful as it may cause the glass envelope to break causing the tube to lose the vacuum and fail as soon as the amplifier is powered on Carefully align the pins with the socket...

Страница 6: ... since that may damage the transformers Speaker s minus terminal should be connected to the speaker terminal marked as zero 0 and positive terminal should be connected to the terminal that corresponds to the speaker s nominal impedance 4 or 8 ohms If your speaker has nominal impedance of 6 ohms you can connect it to either of the two outputs You should try both and select the one that performs bet...

Страница 7: ...level Turning the control knob clockwise increases the sound level and turning it counterclockwise decreases the sound level Back Panel Power Switch Press the power switch to I turn the power on Within 10 20 seconds as the heaters reach operating temperature the tubes will begin to glow a soft orange light Press the power switch to 0 to turn the unit off As the heaters cool off the orange glow wil...

Страница 8: ... is powered on possibly damaging the amplifier as well Also make sure to inspect the tube sockets for cracks and pin inserts Carefully align the pins with the socket and gently insert the new tube Never force a tube into a socket Should you decide to buy replacement tubes from Vista Audio rest assured that they were fully tested before the shipment Only EL84 power tubes can be used Regarding pream...

Страница 9: ...0kHz Inputs CD Tuner Aux Input sensitivity 1 0Vpk Input impedance 50 kohm Output speaker impedance Speaker terminals for 4 and 8 ohms Tubes 2 x ECC83 4 x EL84 Input Voltage 120V 60Hz or 230V 50Hz as marked on the real plate Maximum input current 2A at 120V 1A at 230V Dimensions Width x Depth x Height 14 x 12 x 6 360mm x 300mm x 160mm Weight 16 lbs 7 5kg 9 ...

Страница 10: ...r way you will need to present the original bill of sale to establish the date of purchase shipment Please do not ship your equipment without our prior authorization You are responsible for transporting your unit or arranging for its transportation You must pay the initial shipping charges but we will pay the return shipping charges if the repairs are covered by the warranty When returning your un...

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