Jeff rowland m 7 owners manual

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Introduction Congratulations on your purchase of the Jeff Rowland Design Group Model 7 Mono amplifier. Please take a few moments to read this owners manual. Contrary to popular belief, there is actually quite a bit of useful information in an owners manual. The Model 7 offers tremendous interconnection flexibility regardless of the preamp used. A thorough understanding of your amplifier now can save you a lot of anxiety later. Features - Lack of overall or nested negative feedback eliminates time domain distortion. - Proprietary distortion canceling techniques minimize amplitude related distortions. - Each transistor individually tested and matched for optimum operating characteristics. - Constant output impedance is maintained over the entire audio range, allowing for universal compatibility with associated equipment. - The large number of high-speed bipolar output transistors provides uncompromising reliability and eliminates the need for electronic protection circuitry. - A single voltage amplification stage utilizes field effect transistors (operating in transconductance mode), which increases low-level signal recognition. - The absence of capacitors, inductors, fuses and protection circuitry throughout the signal path eliminates the adverse effects of these devices. - A specially designed toroidal power transformer is supported by the substantial output stage capability. - All critical circuitry is encapsulated in a thermally-conductive epoxy to ensure excellent thermal stability, mechanical integrity and to facilitate ease of service. Unpacking Instructions In the shipping crate you will find: --AC Power Cord --Various Fuses --XLR Shorting Plugs --Performance Certificate --Warranty Card (This form must be completed and returned to JEFF ROWLAND DESIGN GROUP [or its authorized distributor if outside the U.S.A.] within 14 days of purchase. Not only will your amplifier be registered, but you will, in the future, be informed of new products and services.

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We strongly suggest that you save all packing materials Remove the foam pieces which protect the top of the amplifier. The amp can be lifted out of its crate while still wrapped in the plastic bag. In the case of the Model 7 amplifier, do not attempt to move it alone! This amp is extremely heavy. Installation Locate the amplifier as close as possible to its final installation point. Allow access to the back panel for making connections. All Jeff Rowland Design Group products are convection cooled, eliminating the need for a fan. When operating, the amp should have at least 2 inches of space on all sides. It is acceptable to stack the amplifiers only if fresh air is allowed to circulate around them. When the amp is in position, the power cord should be inserted first at the inlet on the amplifier back panel, then connected to an appropriate power source. The amplifier is equipped with a "stand-by" power switch, located and identified on the rear panel, as well as an illuminated power push button switch on the front panel. The stand-by power switch should be turned on initially after plugging in the AC power cord. The amplifier will now be in stand-by mode, indicated by a dimly lit front panel button. The rear panel switch should be left on at all times, maintaining stable operating parameters and thereby improving performance, reliability and longevity. Power consumption in stand-by mode is less than 25 watts, providing low-cost operation. Pressing the dimly lit push button will switch the amplifier on for normal operation. Note that the lamp intensity will increase and a faint "click" will be heard. All subsequent on- off cycles should be initiated by the front panel switch. If the front panel switch does not light, the amplifier does not power up or a fuse blows, disconnect AC power, refer to the troubleshooting section of this manual or contact your dealer. Input Impedance Selection Your amplifier is provided with user-adjustable input impedance. A four (4) position D.I.P. switch for each channel is located and clearly marked on the back panel. Jeff Rowland Design Group has chosen 3 values of input impedance to cover the majority of applications. If you want to change your input impedance, please turn off the front panel power before doing so. Selecting from the switch codes shown below will provide the specific input impedance desired by the user.