User manual JEFF ROWLAND MODEL 12

[. . . ] User selectable switching between balanced and unbalanced connections. Automatic temperature stabilizing circuitry maintains constant operating temperature. · CE approved speaker output connectors requiring no tools for tight connections. · Separate power supply featuring 2nd generation high-speed switch mode circuit design. [. . . ] All internal circuitry is self-adjusting or stable so no adjustments or maintenance of any kind should be necessary over a lifetime of normal operation. If the amplifier is ever in need of service, updating, or upgrading, it should only be returned to an authorized repair facility or technician for servicing. It is not recommended that the customer attempt to disassemble or repair the unit and doing so may void your warranty. · Care Amplifier Front and Rear Panel Function Controls Amplifier Front Panel Standby/Power Button Power Indicator LED Amplifier Rear Panel Input Select Switch NEUTRIK NEUTRIK PUSH Amplifier Front and Rear Panel Function Controls Controls B efore attempting any system interconnection, please familiarize yourself with the front and rear panel controls of the Model 12 Mono Power Amplifier. The descriptions below refer to the diagrams above. Front Panel 1 FRONT PANEL STANDBY/POWER BUTTON: Press this button to Rear Panel (Note: If desired, the switch described below can be switched while the amplifier is operational and playing music. ) operate the amplifier. The small orange POWER INDICATOR LED will illuminate when the amplifier is operational. When the POWER INDICATOR LED is not illuminated, all amplifier inputs are muted and internal circuitry reverts to power-saving (Standby) mode. Anomalous operating conditions will place the amplifier in Standby mode and will prevent the amplifier from being switched back on again until such a condition is eliminated. To avoid spurious noises, the amplifier should never be turned on if the inputs on the rear panel are not connected. Note: All ON/OFF power switching should be initiated ONLY with this button. The amplifier should never be disconnected from AC power without first placing the amplifier in Standby mode. 1 INPUT SELECT SWITCH: This switch selects either the unbalanced RCA inputs or the balanced XLR inputs. Note: When the RCA position is selected, pin 2 of the XLR is shorted to pin 1. Control Functions Rear Panel Power Connections Amplifier Rear Panel DC Power Supply Cable Connector NEUTRIK NEUTRIK PUSH Volts AC Indicator AC Power Cable Connector Power Supply Rear Panel Installation L ocate the amplifier as close as possible to its final installation point. Allow access to the rear panel for making connections. Rear Panel Power Connections Important: Please strictly follow the steps in order as outlined below before operating your Model 12 Mono Power Amplifier. The Model 12 Mono 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 around the heatsink areas. Multiple chassis can be stacked vertically, facilitating an upward flow of warm air currents throughout the vertical heatsink areas. This upward flow must not be blocked or recirculated around the chassis if proper cooling is to be maintained. 1 Verify that the VOLTS AC input identified on the rear panel near the AC input socket is the same as the AC mains voltage in your area. If the voltage does not match, do not connect the amplifier to AC power and contact your dealer immediately. 2 Install the DC Power Supply Cable between the power supply and the amplifier section. There is a slot cut in the edge of the connector on each end of the cable, and this slot should be aligned to face up. Use the knurled ring on the connector to secure the cable to both the power supply and the amplifier. 3 Verify that the AC MAINS CIRCUIT BREAKER and the POSITIVE and NEGATIVE SUPPLY CIRCUIT BREAKERS are closed. mains outlet. 4 Install the AC Power Cable between the amplifier and your AC Note: If the amplifier is to be moved to another location, always place the unit in Standby mode before disconnecting the AC power cable from the AC mains wall outlet. Installation and Power Signal Connections and Remote Input Select Switch Amplifier Rear Panel Balanced Input Connector NEUTRIK NEUTRIK PUSH Parallel Input Connector Speaker Output 12V Remote Connector Power Supply Rear Panel Signal Connections and Remote T he Model 12 Mono Power Amplifier offers unprecedented (usually red) loudspeaker cable spade terminal to the positive (+) binding post and the negative spade terminal (usually black) to the negative (-) binding post. Secure the loudspeaker connection by tightening the knob securely with your fingers. compatibility with associated audio components. When Connecting or disconnecting speaker or interconnect cables, it is necessary to place the amplifier in Standby mode (orange POWER INDICATOR LED on the front panel OFF). 1 If you are using balanced XLR interconnects from your + Warning: Both positive and negative outputs are electrically preamplifier or source component, position the INPUT SELECT switch to BALANCED INPUT. If you are using unbalanced RCA interconnects, position the INPUT SELECT switch to UNBALANCED INPUT. INPUT or UNBALANCED INPUT. 2 Connect your interconnect cable to one input ­ either BALANCED 3 The PARALLEL BALANCED INPUT connector is for secondary active with respect to chassis and/or system ground potential. [. . . ] 32. 6 kg Continuous RMS watts @ 8 ohms @ 4 ohms Inputs: Power Bandwidth: Slew Rate: THD + Noise: Damping Factor: Gain (1 watt, 8 ohms): Input Impedance: Common Mode Rejection Ratio: Absolute Phase: Outputs: Amplifier Section Dimensions: Amplifier Section Weight: Power Supply Dimensions: Power Supply Weight: >80 dB, 20 ­ 20 kHz Phase-Inverted Shipping Dimensions: Shipping Weight: Shipping Specifications Basic Troubleshooting A summary of fault conditions and their causes and remedies are listed below. The Model 12 Mono 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 12 reverting into Standby Mode. Condition: Front panel POWER INDICATOR LED does not illuminate after pressing POWER/STANDBY BUTTON, amplifier does not operate normally: Cause: Incorrect power connections, incorrect speaker connections, or circuit breaker must be reset. Abnormal Operation of the Model 12 internal circuitry. Remedy: Reset circuit breaker, review Installation and Rear Panel Connections section of Owner's Manual. Identify and correct abnormal conditions such as low frequency rumble and/or acoustic feedback caused by phono playback (if applicable). [. . . ]