one step ahead a brand of ENG Vista, Inc. m o d el i 8 4 Integrated Tube Amplifier User’s Manual 500-0010MR2 http://www.vista-audio.com/ 1 Rev.
Dear Customer We at ENG Vista want to take this opportunity to thank you for purchasing the model i84 Integrated Tube Amplifier. The people that stand behind your amplifier draw on more than a decade of professional electronics design and manufacturing experience. We are committed to providing our customers with the high quality sound at affordable prices. We have achieved this goal through modern design, quality parts, expert components sourcing and efficient manufacturing.
SAFETY PRECAUTIONS IMPORTANT SAFEGUARDS PLEASE READ CAREFULLY ALL THE FOLLOWING IMPORTANT SAFEGUARDS THAT ARE APPLICABLE TO YOUR EQUIPMENT CAUTION! TO REDUCE THE RISK OF ELECTRIC SHOCK, DO NOT REMOVE SCREWS. NO USER SERVICEABLE PARTS INSIDE. REFER SERVICING TO QUALIFIED SERVICE PERSONNEL. SAFETY 1) Read the User’s Manual and refer to it frequently during use of this product - All the safety and operating instructions should be read before the product is operated.
ENVIRONMENT 1) Water and Moisture - Do not use this product near water - i.e. near a bathtub, ash bowl, kitchen sink or laundry tub; in a wet basement; or near a swimming pool or the like. Damp basements should be avoided. 2) Heat - The product should be situated away from heat sources such as radiators, heat registers, stoves or other appliances that produce heat. Also avoid putting the unit in the direct rays of the sun. 3) For indoor use only.
Getting Started - About Your Amplifier Your model i84 amplifier was designed to provide a significant value based on a high performance to price ratio that will exceed the sonic quality of good solid state amplifiers with its musical accuracy. The model i84 uses 2 sets of matched pairs (total of 4) of EL84 power output tubes and two ECC83/12AX7 preamp tubes. The model i84 is designed to work in a pure class A for the first 8W of output power.
EL84 EL84 EL84 EL84 V1 ECC83 ECC83 V5 V6 V2 V4 V3 model i84 Figure 1: model i84 tube layout NOTE: EL84 and ECC83 tubes must never be swapped. Inserting ECC83 into the socket intended for EL84, or vice versa, will result in tube and/or amplifier damage that is not covered by warranty. Never use excessive force when inserting the tubes into their socket. Operating Procedure 1. Make sure that you read instructions before attempting to operate your unit. 2.
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.
TUBE REPLACEMENT Your model i84 amplifier’s conservative design maximizes life of the tubes. You can expect that your EL84 power tubes will last approximately 1500 hrs, while the ECC83 preamplifier tubes should last approximately 2500 hrs. Lacking the accurate time measurement, we strongly recommend replacing the output tubes at 1218 months interval (depending on your listening habits) and signal tubes at every other power tube replacement (every 24-36 months).
Technical Specifications: Integrated tube amplifier Maximum output power: 15W Class of operation: A (first 8W) and AB (8-15W) THD: 0.5% max (1W/1kHz) Bandwidth: 15Hz-30kHz Inputs: CD, Tuner, Aux Input sensitivity: 1.
LIMITED WARRANTY 1. Chassis and transformers: 2 years plus 10 days 2. Electron tubes: 6 months plus 10 days Who is covered by this warranty? Your Vista-Audio warranty protects the original consumer owner of this Vista-Audio product. What is covered? Except as specified below, this warranty covers all defects in material and workmanship in this product occurring during the above warranty periods.