Dynacord Power Amplifier DPA 4245 Owner'S Manual Download | Manualshive

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Summary of Contents for Power Amplifier DPA 4245

Page 1: ...or parallel linked operation input gain controls integrated audio limiters power on switching noise suppression protection circuitry DC HF Back EMF output voltage overload limiters initial inrush current limiter output peak current limiter 18 dB oct LO cut filter at 45 Hz SIGNAL and LIMIT indication for optical monitoring thermal overload protection for the heat sink and the internal power supply ...

Page 2: ...s vases are placed on the equipment 15 To completely disconnect this equipment from the AC Mains disconnect the power supply cord plug from the AC receptacle 16 The mains plug of the power supply cord shall remain readily operable CAUTION These servicing instructions are for use by qualified personnel only To reduce the risk of electric shock do not perform any servicing other than that ontained i...

Page 3: ...e power amplifiers momentary operational status is provided through easily readable LED indicators individually showing whether a channel is ready for operation a signal is present at the output if any of the limiter circuits and or one of the protection circuits has been activated The inputs are electronically balanced and carried out as XLRF type and as binding post clamping connectors as well P...

Page 4: ...onment can result in the occurrence of condensation on inner parts Operating the appliance is only permissible after it has accommodated to the altered temperature approximately after one hour Should any foreign solid parts or liquids inadvertently in trude the enclosure immediately unplug the device from the power source and have it checked at a DYNACORD service center before further use Cleaning...

Page 5: ...nnectors or using the parallel linked binding posts For the latter option you can utilize the supplied screw plugs Thus carrying the audio signals through to feed additional power amplifiers can be conve niently achieved without the need for special split cables The XLR type input connectors pin assignment is in accordance to the IEC 268 standard In case the controlling device does not supply bala...

Page 6: ...led via the level controls A and B If the switch is set to its dual stereo position channels A and B are se parately amplified two channel or stereo mode Power Outputs A B The loudspeaker cables are connected to the power amplifier through high performance binding posts with the necessary screw plugs being supplied For connection purposes it is possible to remove the 12 pole terminal plug Cables w...

Page 7: ... security class 3 standard Before the first operation of the power amplifier the loudspeaker terminal strip has to be covered using the supplied protection cover Power Outputs Isolated Outputs 70 V and 100 V To reduce line attenuation effects when the distance between power amplifier and loudspeaker systems exceeds 50 meters it is recommended to employ loudspeaker systems with 100 V or 70 V line t...

Page 8: ...tput and at the isolated output But it is of major importance that the overall power consumption of the connected loudspeaker systems or lines does not exceed the output power capacity of the power amplifier Example If a loudspeaker system with 8 ohms and a nominal power handling ca pacity of 300 watts is connected to the DPA 4260 channel A Direct Output this equals exactly half of the power ampli...

Page 9: ...datory using short cables with suitable diameter 1 5 mm2 2 5 mm2 Careful consideration of the loudspeaker systems correct connection is important in preventing phase correlation problems Channel A carries the signal in phase and therefore has to be connected to the pole of the correspondent loudspeaker system while the loudspeakers pole has to be connected to the output connector of channel B The ...

Page 10: ...ttacks your ears but also lead to damaging the connected loudspeaker systems by overload The limiters are activated only in case of the occurrence of non linear conditions within the power amplifier e g signal clipping at the operation voltage limit The limit ers do not affect the power amplifier s overall dynamic range Signal Indicator This indicator is lit when the audio signal exceeds 30 dB In ...

Page 11: ...where the saturation starts The Limit LEDs on the front panel indicate that the limiters have been activated Despite the protection that is provided through the audio signal limiters the Limit LEDs should not light over a longer period of time Please locate the cause of the faulty operation e g lower the LF EQ setting at the connec ted mixing console when at the same time the input level at the po...

Page 12: ...7 45 1714 1420 700 720 2456 DPA 4260 idling 230V 0 57 131 80 80 273 normal operation 10 dB 230V 3 66 842 655 101 554 1890 alarm 3 dB 230V 7 34 1688 1370 506 864 2948 nominal conditions 230V 9 86 2268 1900 1000 900 3070 initial current inrush for both models 38 A Pmains VA apparent power Umains Imains Pmains W active power Pout W output power Pv W leakage power 1BTU 1055 06 W s Fuses location pos u...

Page 13: ...V 25V THD 0 2 45Hz 20kHz Maximum RMS Voltage Swing 44V 125 V 87V 31V 52V 121V 88V 32V THD 1 1kHz no load connected Frequency Response 3dB ref 1kHz 45 Hz 30kHz 45 Hz 22kHz 45 Hz 30kHz 45 Hz 22kHz LO Cut Filter 18dB octave 45Hz HI Cut Filter 12dB octave 30kHz Voltage Gain 34 dB 34 dB 42 dB 39 dB 30 dB 35 dB 35 dB 42 dB 39 dB 30 dB at 1 kHz Input Sensitivity and Impedance 0dBu 775mV 20 kOhm at rated ...

Page 14: ... 60Hz Power Consumption at 1 8 maximum output voltage rated load impedance 690 W 870 W Protections Audio limiters High temperature DC HF Back EMF Peak current limiters Inrush current limiters Turn on delay Output Transformer Saturation Protection Input Connectors Euro style 3pin detachable or XLR Output Connectors Euro style 12pin detachable covered Cooling Front to Rear 3 stage fans Regulations T...

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Page 16: ...44 483 132 5 131 440 5 377 382 395 3 31 75 44 45 Abmessungen Dimensions ...

Page 17: ...ng 45 D 94315 Straubing Germany Phone 49 9421 706 0 Fax 49 9421 706 265 Asia Pacific Rim Headquarter Asia Singapore Telex Communications SEA Pte Ltd 38C Jalan Pemimpin Singapore 577180 Tel 65 6319 0621 Fax 65 6319 0620 Japan EVI Audio Japan Ltd 5 3 8 Funabashi Setagaya Ku Tokyo Japan 156 0055 Phone 81 3 5316 5020 Fax 81 3 5316 5031 Hong Kong Telex EVI Audio HK Ltd Unit 5 1 F Topsail Plaza 11 On Sh...

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