Related Manuals for Stewart Audio DA-70 Series
Summary of Contents for Stewart Audio DA-70 Series
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Page 1: Owners Manual
DA-70 Series Professional Power Amplifiers. Owners Manual Stewart Audio 14407 Cuesta Court WHEN THE PERFORMANCE DEPENDS ON IT Sonora, Ca 95370 Tel: 209.588.8111 Fax: 209.588.8113 www.Stewartaudio.com... -
Page 2: Safety Notes
Notes: Safety Before using your Stewart Audio Power Amplifier, please read this owner’s manual carefully to ensure optimum trouble-free performance. Warning: To REDUCE THE RISK OF ELECTRICAL SHOCK, DO NOT EXPOSE THIS AMPLIFIER TO RAIN OR MOISTURE. DANGEROUS HIGH VOLTAGES ARE PRESENT INSIDE THE CHASSIS. - Page 3 Notes: - Important Safety Instructions - Please Read Prior to Product Installation. All of the safety and operating instructions should be read before the amplifier is operated. Retain these in- structions for future reference. All instructions should be followed; all warnings on the amplifier and in the operating instructions should be adhered to.
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Page 4: Specifications
Series Amplifiers are convection cooled and require no noisy fans for cooling. Cooling Convection (No Fans) We at Stewart Audio strive to bring you the Controls Power on/off, Channel Gain finest in professional electronics, and we thank LED Indicators Power & Clip you for your choice, which we see as an appreciation for our efforts. - Page 5 Troubleshooting Reference Chart Contents Symptom: Recommended Action: No output Power indicator is off. Be sure power outlet is “live” Be (There is a normal delay of up sure power switch is “on.” to 30 seconds on turn-on.) No output Power indicator LED This indicates a short-circuit Special Features……………………………………………….……...…6 cycles on and off.
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Page 6: Special Features
Digital Audio Technology. The new, all Digital DA Series Power Amplifiers 70 Series amplifier, Chances are good that you will be were developed by Stewart Audio’s Digital Audio Team and represent the able to remedy the problem yourself using standard pinnacle of Stewart Audio technology and design. -
Page 7: Input Wiring
What is Damped Ternary Modulation? Conventional Class D amplifiers utilize binary, or BI-state op- Your DA-70 Series amplifier is provided with a 3 con- eration. Binary consists of only two switching states, positive ductor Phoenix Type connector for each input. -
Page 8: Ac Power Considerations
AC Power Considerations Your Stewart Audio DA-70-2 and DA-70-4 amplifiers are de- signed to operate on 120 volt, 60 Hz AC current. Your Stewart Audio DA-70-2-PFC and DA-70-4-PFC amplifi- ers are designed to operate over a range of 90 volts - 240 volts, 50-60 Hz alternating current. -
Page 9: Mechanical Considerations
PFC model Therefore while a DA-70-2 runs very cool, the DA-70-4-PFC will require a little more attention to cooling. Bridging of the DA-70 Series is not possible due to the high Multiple amplifiers can be racked on top of one another efficiency design of the Damped Ternary Modulation. -
Page 10: Rear Panel
AC Power Connection Power On/Off and LED Clip Indicators All DA-70 Series amplifiers are equipped with a IEC socket on The front panel provides visual feedback of the amplifiers the rear apron for AC connections.
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