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Summary of Contents for JEFF ROWLAND 12
- Page 1 Model 12 Model 12 Mono Power Amplifier Mono Power Amplifier Owner’s Manual Owner’s Manual...
- Page 2 Introduction Introduction 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. numerous function control and interconnect possibilities, precision electronic circuitry, and accurately machined chassis components throughout, your Model 12 Mono Power Amplifier will offer you many years of musically satisfying enjoyment.
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Page 3: Product Features
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. Automatic temperature stabilizing circuitry maintains constant operating temperature. - Page 4 Contents Contents Model 12 Model 12 Amplifier Amplifier Section Section DC Power DC Power Supply Cable Supply Cable AC Power Cable AC Power Cable Model 12 Model 12 Power Power Supply Supply Warranty Card Warranty Card...
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Page 5: Initial Inspection
Note: Many shippers require notification and inspection within twenty-four hours of delivery to ascertain the nature of damages incurred. Your Model 12 Mono Power Amplifier has undergone extensive performance evaluations, listening tests, quality control inspections, and a minimum seventy-two hour burn-in period prior to shipment and should therefore be in perfect operating condition upon receipt. -
Page 6: Care, Cleaning, And Maintenance
Care, Cleaning, and Maintenance Care, Cleaning, and Maintenance... - Page 7 Care Care he Model 12 Mono Power Amplifier is finely constructed 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,...
- Page 8 Amplifier Front and Rear Panel Function Controls Amplifier Front and Rear Panel Function Controls Standby/Power Button Standby/Power Button Input Select Switch Input Select Switch Amplifier Front Panel Amplifier Front Panel Power Indicator LED Power Indicator LED Amplifier Rear Panel...
- Page 9 Amplifier Front and Rear Panel Function Cont Amplifier Front and Rear Panel Function Controls 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.
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Page 10: Ac Power Cable Connector
Rear Panel Power Connections Rear Panel Power Connections DC Power Supply DC Power Supply Cable Connector Cable Connector Amplifier Rear Panel Volts AC Volts AC Indicator Indicator Power Supply Rear Panel AC Power Cable AC Power Cable Connector Connector... -
Page 11: Installation
Allow access to the rear panel for making connections. 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. -
Page 12: Balanced Input Connector
Signal Connections and Remote Signal Connections and Remote Input Select Input Select Switch Switch Balanced Input Balanced Input Connector Connector 12V Remote 12V Remote Connector Connector Amplifier Rear Panel Parallel Input Parallel Input Connector Connector Power Supply Rear Panel Speaker Speaker Output Output... - Page 13 Signal Connections and Remote Signal Connections and Remote he Model 12 Mono Power Amplifier offers unprecedented compatibility with associated audio 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).
- Page 14 Parallel Connection Diagram Parallel Connection Diagram + and – 0.5 Meter Speaker Wire Speaker Outputs to Cable Loudspeakers Jumper from + to + 0.5 Meter Speaker Cable Jumper from – to – Interconnect from Preamp Output 0.5 Meter XLR Interconnect...
- Page 15 The Model 12 Mono Power Amplifier offers a unique solution for owners of the Model 12 who feel that they need more power or would like to increase the sound quality of their audio system: parallel connection of multiple amplifiers.
- Page 16 Overall Gain Overall Gain he overall gain of the Model 12 Mono 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 in a small number of situations involving low efficiency systems the higher gain setting may be necessary.
- Page 17 Model 12 Mono Power Amplifier Specifications Model 12 Mono Power Amplifier Specifications Output Power: Output Power: Continuous RMS watts @ 8 ohms 200 watts @ 4 ohms 350 watts Power Bandwidth: Power Bandwidth: DC to 160 kHz, -3 dB Slew Rate:...
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Page 18: Basic Troubleshooting
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. - Page 19 Additional Information f you have any additional questions regarding the installation or operation of the Model 12 Mono 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.
- Page 20 Post Office Box 7231 Colorado Springs, Colorado 80933 USA...
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