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Jeff Rowland Design Group 112 manual

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Table of contents for the manual

  • Page 1

    Model 112 Stereo Power Amplifier Owner’s Manual Model 112 Model 112 Stereo Power Amplifier Stereo Power Amplifier Owner’s Manual Owner’s Manual[...]

  • Page 2

    Introduction Introduction W 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 W ith its combination of features such as numerous function control and interconnect possibilities, precision electronic circuitry, and accurately mac[...]

  • Page 3

    Product Features Product Features • XLR input connectors for balanced (Differential Mode  ) system configuration. • RCA input Connectors for unbalanced system configurations. • Selectable overall gain of 26 or 32 dB. • User selectable switching between balanced and unbalanced connections. • 12V remote ON/OFF power switching connector. [...]

  • Page 4

    Contents Contents Model 112 Stereo Model 112 Stereo Power Amplifier Power Amplifier Warra Warra nty Card nty Card AC Power Cable AC Power Cable[...]

  • Page 5

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

  • Page 6

    Care, Cleaning, and Maintenance Care, Cleaning, and Maintenance NEUT RIK PUSH NEUT RIK PUSH[...]

  • Page 7

    Care Care T T he Model 112 Stereo Power Amplifier is finely constr ucted from pieces of solid aluminum. The surface of the unit is cut in a unique process that uses a diamond tipped blade. This process was refined over many years to produce an artistic and attractive finish. The front, top, bottom and side panels are t hen finished with fine automo[...]

  • Page 8

    Amplifier Front and Rear Panel Function Controls Amplifier Front and Rear Panel Function Controls NEUTRI K P US H NEUTRI K P US H Standby/Power Button Standby/Power Button Power Indicator LED Power Indicator LED Right Channel Input Right Channel Input Select Switch Select Switch Left Channel Input Left Channel Input Select Switch Select Switch[...]

  • Page 9

    Amplifier Front and Rear Panel Function Controls Amplifier Front and Rear Panel Function Controls B B efore attempting any system interconnection, please famili arize yourself with the front and rear panel controls of the Model 112 Stereo Power Amplifier. The descriptions below refer to the diagrams above. Front Panel Front Panel 1 1 FRONT PANEL ST[...]

  • Page 10

    Rear Panel Power Connections Rear Panel Power Connections Amplifier Rear Panel NE UTRIK PUSH NE UTRIK PUSH AC Power Cable AC Power Cable Connector Connector Volts AC Volts AC Indicator Indicator[...]

  • Page 11

    Installation Installation L L ocate the amplifier as close as possible to its final installation point. Allow access to the rear panel for making connections. The Model 112 Stereo Power Amplifier is convection cooled, eliminating the need for fan or forced - air cooling. When operating, the chassis should have at least two (2) inches of air space a[...]

  • Page 12

    Signal Connections and Remote Signal Connections and Remote Amplifier Rear Panel NE UTRIK PUSH NE UTRIK PUSH Balanced Input Balanced Input Connector Connector 12V Remote 12V Remote Connector Connector Unbalanced Unbalanced Input Connector Input Connector Input Select Input Select Switch Switch Speaker Speaker Output Output[...]

  • Page 13

    Signal Connections Signal Connections T T he Model 112 Stereo Power Amplifier offers unprecedented compatibility with associated audio components. When Connecting or disconnecting speaker or intercon nect cables, it is necessary to place the amplifier in Standby mode (orange POWER INDICATOR LED on the front panel OFF). 1 1 If you are using balanced[...]

  • Page 14

    Internal Function Controls Internal Function Controls Overall Gain Overall Gain T T he overall gain of the Model 112 Stereo Power Amplifier can be adjusted between 26 dB and 32 dB. The setting from the factory is 26 dB, which is ad equate for the majority of applications, though in a small number of situations involving low efficiency systems the h[...]

  • Page 15

    Model 112 Stereo Power Amplifier Specifica Model 112 Stereo Power Amplifier Specifica tions tions Output Power: Output Power: Continuous RMS watts @ 8 ohms 150 watts @ 4 ohms 275 watts Power Bandwidth: Power Bandwidth: DC to 160 kHz, - 3 dB Slew Rate: Slew Rate: 30 volts/microsecond THD + Noise: THD + Noise: <.008% Damping Factor: Damping Factor[...]

  • Page 16

    Basic Troubleshooting Basic Troubleshooting A A summary of fault conditions and their causes and remedies are listed below. The Model 112 Stereo Power Amplifier can produce high power levels that, without well - designed protection circuitry, could damage loudspeakers. Therefore, most fault conditions will result in the Model 10 reverting into Stan[...]

  • Page 17

    Additional Information Additional Information I I f you have any additional questions regarding the installa tion or operation of the Model 112 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. Troubleshooting Troubleshooting and Inf[...]

  • Page 18

    Post Office Box 7231 Colorado Springs, Colorado 80933 USA[...]