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JEFF ROWLAND 302 manual

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Table of contents for the manual

  • Page 1

    Model 302 Stereo Power Amplifier Owner’s Manual Model 302 Stereo Power Amplifier Owner’s Manual[...]

  • Page 2

    T able of Contents T able of Contents Introduction.......................................................................................................................................4 Product Features...............................................................................................................................5 Initial Inspection[...]

  • Page 3

    W elcome to the Jeff Rowland Design Group “family ” and congratulations on your purchase of what is unquestionably one of the world's finest audio power amplifiers. W ith its combination of features such as numerous function control and interconnect possibilities, precision electronic circuitry, exceptional efficiency , and accurately mach[...]

  • Page 4

    Product Features Product Features ! XLR input connectors for balanced system configuration. ! RCA input connectors for unbalanced system configurations. ! Dual Speaker Output Terminals on each channel for bi- wiring applications. ! User selectable switching between balanced and unbalanced connections. ! Transformer coupled inputs provide universal [...]

  • Page 5

    Pack age Contents Pack age Contents 6 6 WARRANTY REGISTRATION WARRANTY REGISTRATION AC Power Cable AC Power Cable Warranty Card Warranty Card Model 302 Stereo Power Amplifier Model 302 Stereo Power Amplifier Compliant Isolation Pads Compliant Isolation Pads Care Care Care and Maintenance Instruction Card Care and Maintenance Instruction Card Owner?[...]

  • Page 6

    I nspect the shipping container for damage. If the shipping container, packing material, amplifier, or accessories are damaged or missing, notify your dealer and the shipper (if a claim is to be made) immediately . Note: Many shippers require notification and inspection within twenty-four hours of delivery to determine the nature of damages incurre[...]

  • Page 7

    4 4 5 5 1 1 1 1 1 1 2 2 3 3 8 8 Unpacking the Amplifier Unpacking the Amplifier[...]

  • Page 8

    The Model 302 is a large and heavy amplifier. Due caution should be taken when unpacking and installing the amplifier to avoid injury or damage to the amplifier. The Model 302 should be unpacked by at least two people, however it is possible for one person to unpack the amplifier safely . There should be a portion of carpet or soft, padded cloth to[...]

  • Page 9

    Amplifier Maintenance, Cleaning, and Protection Amplifier Maintenance, Cleaning, and Protection 10 10[...]

  • Page 10

    Amplifier Maintenance, Cleaning, and Protection Amplifier Maintenance, Cleaning, and Protection Maintenance and Cleaning A ll Jeff Rowland Design Group products are designed to provide a lifetime of enjoyment and listening pleasure. The chassis is sealed to prevent dust from entering and the interior of the chassis should not need cleaning during t[...]

  • Page 11

    Amplifier Installation, Use, and Care Amplifier Installation, Use, and Care L ocate the amplifier as close as possible to its final installation point. Allow access to the rear panel for making connections. The Model 302 Stereo Power Amplifier is extremely efficient and convection cooled, eliminating the need for fans or forced-air cooling. Multipl[...]

  • Page 12

    ! When operating the Model 302, a properly grounded AC receptacle should be used. A potential shock hazard may result if the supplied 3-wire, grounded AC cable ground terminal is defeated or lifted or the unit is connected to a 2-wire ungrounded AC outlet. ! The output terminals or loudspeaker cables should never be shorted to each other or to grou[...]

  • Page 13

    Amplifier Front P anel Functions and Indicators Amplifier Front P anel Functions and Indicators Front Panel Power/Standby Button Front Panel Power/Standby Button Front Panel Power/Standby Indicator Front Panel Power/Standby Indicator 14 14[...]

  • Page 14

    Amplifier Front P anel Functions and Indicators Amplifier Front P anel Functions and Indicators B efore attempting any system interconnection, please familiarize yourself with the front panel control of the Model 302 Stereo Power Amplifier . The descriptions below refer to the illustration on the adjacent page. FRONT PANEL STANDBY/POWER BUTTON: Pre[...]

  • Page 15

    Amplifier Rear Panel P ower Connections Amplifier Rear Panel P ower Connections 16 16 1 1 1 2 2 2 3 3 3 4 4 4 NEUTRIK NEUTRIK PUSH PUSH NEUTRIK NEUTRIK PUSH PUSH UNBALANCED INPUT UNBALANCED INPUT UNBALANCED INPUT BALANCED INPUT BALANCED INPUT BALANCED INPUT LEFT INPUT SELECT LEFT INPUT SELECT LEFT INPUT SELECT UNBALANCED INPUT UNBALANCED INPUT UNBA[...]

  • Page 16

    Amplifier Rear Panel P ower Connections Amplifier Rear Panel P ower Connections Important: Please strictly follow the following steps outlined below in order before operating your Model 302 Stereo Power Amplifier . K Verify that the VOL TS AC input identified on the rear panel near the AC input socket is the same as the AC mains voltage in your are[...]

  • Page 17

    Amplifier Rear Panel Signal Connections Amplifier Rear Panel Signal Connections 18 18 NEUTRIK NEUTRIK PUSH PUSH NEUTRIK NEUTRIK PUSH PUSH STEREO POWER AMPLIFIER STEREO POWER AMPLIFIER STEREO POWER AMPLIFIER MODEL 302 MODEL 302 MODEL 302 MADE IN U.S.A . MADE IN U.S.A . MADE IN U.S.A . UNBALANCED INPUT UNBALANCED INPUT UNBALANCED INPUT BALANCED INPUT[...]

  • Page 18

    Amplifier Rear Panel Signal Connections Amplifier Rear Panel Signal Connections T he Model 302 Stereo Power Amplifier offers unprecedented compatibility with associated audio components. When connecting or disconnecting speaker or interconnect cables, the amplifier should be placed in Standby mode (blue POWER INDICATOR LED on the front panel OFF). [...]

  • Page 19

    Internal Adjustments Internal Adjustments Overall Gain T he overall gain of the Model 302 Stereo Power Amplifier can be adjusted between 26 dB and 32 dB . The setting from the factory is 26 dB, which is adequate for the majority of applications, though some systems involving low efficiency loudspeakers may require the higher gain setting. There is [...]

  • Page 20

    Model 302 Stereo Power Amplifier Specifications Model 302 Stereo Power Amplifier Specifications Output Power: Continuous RMS watts, both channels driven @ 8 ohms @ 4 ohms Power Bandwidth: Peak Output Current: Dynamic Range: THD + Noise, 0.1W-500W/4 ohm: CCIF Intermodulation Distortion, 19/20 kHz: Damping Factor @ 1kHz: Overall Gain: (Balanced or Un[...]

  • Page 21

    16.0 in. (40.6 cm) 16.0 in. (40.6 cm) 14.5 in. (36.8 cm) 14.5 in. (36.8 cm) Dimensions Dimensions A summary of the amplifier chassis dimensions is indicated below. A summary of the amplifier chassis dimensions is indicated below. 22 22 15.5 in. (39.4 cm) 15.5 in. (39.4 cm) 10.6 in. (26.9 cm) 10.6 in. (26.9 cm) 18.3 in. (46.9 cm) 18.3 in. (46.9 cm) [...]

  • Page 22

    Additional Information Additional Information I f you have any additional questions regarding the installation or operation of the Model 302 Stereo Power Amplifier , please contact your authorized Jeff Rowland Design Group dealer or check the Jeff Rowland Design Group web site at http://www .jeffrowland.com. I f you have any additional questions re[...]