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Summary of Contents for Audio Research Reference 750 SEL
- Page 1 Reference 750 H I G H D E F I N I T I O N ®...
- Page 2 There is only One Reference®...
- Page 3 Thank you for choosing the Reference 750 SEL to be a part of your high performance music listening system. Since 1970, Audio Research has been creating some of the world’s finest audio equipment. Each piece is handcrafted in Minnesota, and has been designed to provide many years of listening enjoyment.
- Page 4 Contents Safety Instructions Warnings Installation Vacuum Tube Placement Illustration Before Operating the Reference 750 SEL Vacuum Tube Installation Ventilation Requirements In Your System Vacuum Tube Life Expectancy Installation of Optional Cover Connections Back Panel Illustration Input Connector Output Connectors Impedance Matching...
- Page 5 Safety Instructions The lightning flash with arrowhead symbol within an equilateral triangle, is intended to alert the user to the presence of uninsulated ‘dangerous voltage’ within the product’s enclosure that may be of sufficient magnitude to constitute a risk of electric shock to persons. The exclamation point within an equilateral triangle is intended to alert the user to the presence of important operating and maintenance (service) instructions in the literature accompanying the product.
- Page 6 • THE MAINS PLUG OF THE POWER SUPPLY CORD SHALL REMAIN READILY ACCESSIBLE. • The user-replaceable fuses of the Reference 750 SEL shall only be replaced with a fuse of the correct breaking capacity and voltage rating as specified below and on the rear panel of the amplifier.
- Page 7 Warnings This unit is RoHS compliant. To prevent fire, or shock hazard, do not expose your Reference 750 SEL to rain or Handling and moving the Reference moisture. 750 SEL At 170 lbs. (77.2 Kg) net weight per chassis, Do not place objects containing water on the Reference 750 amplifier is too heavy top of this unit.
- Page 8 Reference 750 SEL. Firmly seat each tube Included are one 6H30 input tube, two in its matching socket, taking care to align KT150 drivers, and 16 KT150 output tubes.
- Page 9 Improper installation will cause premature periodically replaced. The KT150 output component and /or tube failure and will tubes in the Reference 750 SEL should affect your warranty as well as the service have an estimated life of approximately life of the unit. If you have any questions...
- Page 10 Connections Back Panel Connections Input Connector Hour Meter Meter Reset AC Power Coupler Fuse Output Connectors...
- Page 11 Input Connector such as most electrostatic types, The Reference 750 SEL uses a fully determine the best impedance match balanced circuit topology and thus has empirically for best overall sonic results one balanced XLR input connector on by trying different output taps. Connect the rear panel.
- Page 12 SEL be connected via its supplied 20 audio system. amp IEC 12-gauge power cord to a The Reference 750 SEL uses a grounding secure, dedicated AC power receptacle. system that does not require a ground- Never connect to convenience power lifter adaptor plug on the AC power receptacles on other equipment.
- Page 14 Operation Front Panel Controls WATTS Fan Speed Meter Light Bias A.C. VOLTS Power...
- Page 15 Note The Reference 750 SEL should be turned on after the other components of your system. If the Reference 750 SEL is turned on before other components, the amplifier will amplify any extraneous turn-on noises those components might generate, which could potentially damage loudspeakers.
- Page 16 Press BIAS switch once and the V1 output good service life of the output tubes. tube LED is illuminated with its bias Audio Research-supplied output tubes level indicated on the front panel meter. are warranted for 90 days, and under...
- Page 17 Research, and are strongly recommended for best sonic performance and reliability. These tubes are burned in, measured, matched and specifically selected for your Audio Research amplifier. Contact your authorized dealer for suggested retail prices. Hour Counter An LCD hour counter of elapsed tube operating time can be viewed on the back panel.
- Page 18 Caution It is recommended that you replace the Your Reference 750 SEL amplifier vacuum tubes of your Reference 750 SEL contains sufficient levels of voltage and in sets. All of the tubes in your amplifier current to be lethal. Do not tamper with have been matched to have similar a component or part inside the unit.
- Page 19 Please contact your dealer or importing distributor for instructions on proper disposal of this product in your country. Or, contact Audio Research Corporation (763-577-9700) for the name of your importing distributor and how to contact them. Packing and shipping materials may...
- Page 20 3-Year Limited Warranty beyond the ability of the importer is or a 90-Day Limited Warranty (vacuum required, Audio Research will fulfill the tubes). This Limited Warranty initiates terms and conditions of the Limited from the date of purchase, and is limited Warranty.
- Page 21 Specifications Power Output: 750 watts per channel continuous from 20Hz to 20kHz. 1kHz total harmonic distortion typically 0.5% at 750 watts, below .04% at 1 watt. Approximate actual power available at “clipping” 850 watts (1kHz). (Note that actual power output is dependent upon both line voltage and “condition” i.e.: if power line has high distortion, maximum power will be affected adversely, although from a listening standpoint this is not very critical.) Power Bandwidth: (-3dB points) 15Hz to 150kHz.
- Page 22 6655 Wedgwood Road North Maple Grove, MN 55311 www.audioresearch.com Specifications subject to change without notice. ©2022 Audio Research Corporation. Reproduction of this document in part or whole is expressly forbidden without written consent from Audio Research Corporation.
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