D&B D80 Manual
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Contents
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Maximum cable length for 5 % voltage drop at 3600 W mains power drawCable cross section 100 V 120 V 208 V 230 V1.3 mm2 - AWG 16 Not permitted Not permitted 21 m/69 ft 25 m/82 ft1.5 mm2 Not permitted Not permitted 24 m/79 ft 29 m/95 ft2.1 mm2 - AWG 14 Not permitted Not permitted 33 m/108 ft 40 m/131 ft2.5 mm2 Not permitted Not permitted 40 m/131 ft 49 m/161 ft3.3 mm2 - AWG 12 12 m/39.5 ft 18 m/60 ft 53 m/174 ft 64 m/210 ft4.0 mm2 15 m/50 ft 21 m/69 ft 63 m/206.5 ft 78 m/256 ft5.3 mm2 - AWG 10 19 m/62 ft 28 m/92 ft 83 m/272 ft 102 m/334.5 ft6.0 mm2 22 m/72 ft 32 m/105 ft 95 m/312 ft 116 m/380.5 ft8.4 mm2 - AWG 8 31 m/101 ft 44 m/144 ft 133 m/436 ft 162 m/531.5 ft12.1.6. Generator operation/UPS requirementsTo operate the amplifier using a mains generator or uninterruptiblepower supply (UPS), observe the following:– With the D80 amplifier the apparent power figure (VA value)is about the same as the effective power figure (W value).– Use a generator or UPS that can deliver the maximum powerrequired by the entire system. Assume a short time powerdraw of 7 kVA per D80. This is particularly important whenusing a UPS without dedicated short-time overload capability.– Run the generator or UPS at 220 to 240 V, if available. 50 or60 Hz is not an issue.12.2. Power amplifiersThe power amplifiers fitted to the D80 utilize Class D technologysimilar to a switch mode power supply. Compared to the knownlinear amplifier concept (Class A, AB, G or H), Class D poweramplifiers produce less heat and allow for a compact and light-weight design.While supplying very high maximum output swing, it maintains highefficiency with any kind of signal and load and runs as cool aspossible. Channels share the same power supply and are thermallycoupled to provide even higher average power figures whenunevenly loaded. TOP/SUB setups and active cardioid subwoofersare cases of typical use. A sophisticated circuit design decreasesthe impact of the load on the amplifier performance and enables awell defined sound reproduction. A comprehensive set ofprotection features individually prevents each channel fromoverload and/or damage/defect. Channels that are not affectedwill continue to operate, if safely possible.d&b D80 Manual 1.8 en 67 |
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