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JEFF ROWLAND Model 2 manual

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Table of contents for the manual

  • Page 1

    JE F F R O WL AN D DE SI GN G R OU P[...]

  • Page 2

    Model 2 Stereo Power Amplifier Owner’ s Manual[...]

  • Page 3

    Introduction 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. þ With its combination of industrial grade active and passive devices, precision electronic circuitry and accurately machined chassis components throughout, your Mode[...]

  • Page 4

    Product Features þ XLR Balanced Input jacks for balanced (Differential Mode™) system configurations þ XLR to RCA Input adapters included þ User-selectable overall gain of 26 or 32 dB þ User-selectable input impedance of 36k Ω (HI) or 600 Ω (LO) þ All internal signal circuitry is totally isolated from chassis and system ground potentials [...]

  • Page 5

    1 2 3 4 5 6 Contents[...]

  • Page 6

    Initial Inspection 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). Note: Many shippers require notification and an inspection within twenty-four (24) hours of delivery to ascertain the nature of d[...]

  • Page 7

    Front & Rear Panel Function Controls A 1 2[...]

  • Page 8

    Front & Rear Panel Function Controls B efore attempting any system interconnection, please familiarize yourself with the front and rear panel controls of the Model 2 Amplifier . The descriptions below refer to the numbers associated with the features in the diagram above. Front Panel A FRONT P ANEL ST ANDBY/POWER button: Press to operate Amplif[...]

  • Page 9

    2 1 3 Rear Panel Power Connections[...]

  • Page 10

    Installation L ocate the Amplifier as close as possible to its final installation point. Allow access to the rear panel for making connections. The Model 2 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. Multip[...]

  • Page 11

    2 1 Signal Connections 4 3 3[...]

  • Page 12

    Signal Connections T he Model 2 amplifier offers unprecedented compatibility with associated audio components. When connecting or disconnecting speaker or interconnect cables, it is only necessary that the FRONT P ANEL ST ANDBY/ POWER button be pressed to switch the amplifier to standby mode. The button will not be illuminated in this mode. 1 When [...]

  • Page 13

    Operation A fter following the procedures outlined in the Installation/Rear Panel Power Connections and Signal Connections sections, the Amplifier can be turned on by pressing the FRONT P ANEL ST ANDBY/POWER button. Allow approximately twenty (20) minutes for the amplifier to reach operating temperature and maximum performance potential. A short wa[...]

  • Page 14

    Performance Specifications Output Power Continuous RMS watts @ 8 ohms 75 watts @ 4 ohms 150 watts Power Bandwidth 0.1 Hz to 160 kHz, -3 dB Slew Rate 80 volts per microsecond THD and Noise Less than 0.05% at rated power Damping Factor Greater than 100, 20 Hz to 20 kHz, 8 ohms Output Current 20 amps continuous, 35 amps peak Overall Gain & Sensiti[...]

  • Page 15

    Basic T roubleshooting A summary of fault conditions, their causes and remedies, are listed below. The Model 2 Amplifier can produce high power levels which, without well designed pr otection circuitry, could damage loudspeaker s. Therefore, most fault conditions which may occur during use will be indicated by the Model 2 reverting to a standby con[...]

  • Page 16

    Condition FRONT P ANEL ST ANDBY/POWER button illuminates normally but RIGHT , LEFT or both Amplifier CHANNELS do no operate or warm up to normal operating temperature. AC MAINS CIRCUIT BREAKER (rear panel) switches off or will not remain on. 50/60 Hz hum noise in loudspeakers. High frequency, random or scratching noise in loudspeakers. Cause Intern[...]

  • Page 17

    I f you have any additional questions regarding installation or operation, please contact your authorized Jeff Rowland Design Group Dealer . JEFF R O WL AND DESI GN G ROUP[...]