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Macro-Tech

®

602/1202/2402

Power Amplifiers

Page 33

Reference Manual

Fig. 6.6 Macro-Tech 2402 Maximum Power Matrix

Fig. 6.5 Macro-Tech 1202 Maximum Power Matrix

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Summary of Contents for Macro-Tech 2402

Page 1: ...A Telephone 219 294 8000 Fax 219 294 8329 Macro Tech amplifiers are produced by the Professional Audio Unit of Crown International Inc Trademark Notice PIP PIP2 SmartAmp and Grounded Bridge are trademarks and Amcron Crown Macro Tech IOC ODEP and IQ System are registered trademarks of Crown International Inc Other trademarks are the property of their respective owners ...

Page 2: ...foraperiodofthree 3 yearsfromthedateofpurchasebytheoriginalpurchaser the warrantyperiod thatthenewCrownproductisfreeofdefectsinmaterials and workmanship We further warrant the new Crown product regardless of the reason for failure except as excluded in this Warranty ITEMS EXCLUDED FROM THIS CROWN WARRANTY This Crown Warranty is in effect only for failure of a new Crown product which occurred withi...

Page 3: ... used to alert the user to important operating or maintenance instructions WARNING TO REDUCE THE RISK OF ELECTRIC SHOCK DO NOT EXPOSE THIS EQUIPMENT TO RAIN OR MOISTURE Magnetic Field CAUTION Do not locate sensitive high gain equipment such as preamplifiers or tape decks directly above or below the unit Because this amplifier has a high power density it has a strong magnetic field which can induce...

Page 4: ... an electrician for replacement of the obsolete outlet 10 Protect the power cord from being walked on or pinched par ticularly at plugs convenience receptacles and the point where they exit from the apparatus 11 Only use attachments accessories specified by the manufac turer 12 Use only with a cart stand bracket or table specified by the manufacturer or sold with the apparatus When a cart is used ...

Page 5: ...ions 20 4 2 Indicators 20 4 3 Protection Systems 22 4 3 1 ODEP 22 4 3 2 Standby Mode 22 4 3 3 Transformer Thermal Protection 22 4 3 4 Fuses and Circuit Breakers 23 4 4 Controls 23 4 5 Filter Cleaning 24 5 Technical Information 25 5 1 Overview 25 5 2 Circuit Theory 25 5 2 1 Stereo Operation 25 5 2 2 Bridge Mono Operation 27 5 2 3 Parallel Mono Operation 27 6 Specifications 28 7 AC Power Draw Therma...

Page 6: ...s 23 5 1 Circuit Block Diagram 26 6 1 Macro Tech 602 Minimum Power Matrix 30 6 2 Macro Tech 1202 Minimum Power Matrix 31 6 3 Macro Tech 2402 Minimum Power Matrix 31 6 4 Macro Tech 602 Maximum Power Matrix 32 6 5 Macro Tech 1202 Maximum Power Matrix 33 6 6 Macro Tech 2402 Maximum Power Matrix 33 6 7 Typical Frequency Response 34 6 8 Typical Damping Factor 34 6 9 Typical Output Impedance 34 6 10 Typ...

Page 7: ... use cutting edge technology to deliver the ultimate in power and value for their size weight and price They offer numerous advantages over conventional designs and provide benefits you can t get in amplifiers from any other manufacturer Here are some of their many features Crown s Grounded Bridge design delivers large voltage swings without using easily stressed output transistor con figurations ...

Page 8: ...are provided by our latest protection scheme Quad Mute Efficient heat sinks and a self contained forced air cool ing system dissipate heat quickly and evenly for extra amplifier protection and greater power output Extra rugged extruded aluminum front panel with ODEP and signal presence IOC indicators for each channel and an Enable indicator Mounts in a standard 19 inch 48 3 cm equipment rack units...

Page 9: ...ulation Protection circuitry these amber indicators glow brightly to show the presence of reserve thermal dynamic energy They dim proportionally as energy re serves decrease In the rare event that energy reserves are depleted the indicators turn off and ODEP propor tionally limits output drive so the amplifier can safely continue operating even under severe conditions These indicators can also hel...

Page 10: ...xed voltage gain of 26 dB see Section 4 4 K Balanced Phone Jack Inputs Balanced 1 4 inch phone jack input connectors are pro vided on the PIP2 FXQ The phone jacks can be wired for either balanced tip ring and sleeve or unbalanced tip and sleeve input signals Caution The Channel 2 input should NOT be used in either Bridge Mono or Parallel Mono mode L Balanced XLR Inputs The factory installed PIP2 F...

Page 11: ...meter per minute per unit for the Macro Tech 602 and 1202 and at least 45 cubic feet 1 3 cubic meters per minute per unit for the Macro Tech 2402 Additional air flow may be required when driving low impedance loads at consistently high output levels Refer to Section 7 for detailed information on thermal dissipation Fig 3 1 Mounting Dimensions When mounting the amplifier in a rack the side walls of...

Page 12: ...e are VERY IMPORTANT wiring differences among these three modes which will be discussed next Fig 3 4 Stereo Wiring 3 3 1 Stereo Two Channel Operation In Stereo mode installation is very intuitive input Chan nel 1 feeds output Channel 1 and input Channel 2 feeds output Channel 2 To put the amplifier in Stereo mode first turn off the amplifier then slide the stereo mono switch to the center position...

Page 13: ...ignal level and quality may be greatly degraded Keep the Channel 2 level control turned down com pletely counterclockwise Note The input jack and level control of Channel 2 are Fig 3 5 Bridge Mono Wiring not defeated in Bridge Mono mode Any signal fed into Channel 2 will work against and add to or distort the signal in Channel 1 Connect the load across the Channel 1 and 2 red bind ing posts with t...

Page 14: ...the amplifier in Parallel Mono mode turn it off and slide the stereo mono switch to the left as you face the back panel Connect the input signal to Channel 1 only The Channel 2 input and level control are by passed in this mode so they should not be used Note It is normal for the IOC indicator of Channel 2 to remain lit in Parallel Mono mode Install a jumper wire between the red binding posts of b...

Page 15: ...ut signals are bal anced or unbalanced and 2 whether the signal source Fig 3 7 Unbalanced Input Wiring Fig 3 9 Balanced and Unbalanced Phone Plugs Fig 3 8 Balanced Input Wiring floats or has a ground reference Figures 3 7 and 3 8 show the recommended connection techniques for each type of signal source The amplifier s built in 1 4 inch phone jack input connec tors can be wired similarly for balanc...

Page 16: ...er Capacitors tenuate such frequencies place a capacitor in series with the input signal line The graph in Figure 3 10 shows some capacitor values and how they affect the frequency response Use only low leakage paper mylar or tantalum capacitors Another problem to avoid is the presence of large lev els of radio frequencies or RF in the input signal Al though high RF levels may not pose a threat to...

Page 17: ...er when mak ing or breaking connections for example a standard three wire stereo phone plug 3 Connectors that can be plugged into AC power receptacles should never be used 4 Connectors with low current carrying ca pacity should not be used 5 Connectors with any tendency to short should never be used 3 3 5 Output Connection Consider the power handling capacity of your load be fore connecting it to ...

Page 18: ... 1 and 2 will require the substitution of new values for cable length or damping factor in the nomograph For option 3 estimate the effective wire gauge by subtracting 3 from the apparent wire gauge every time the number of conductors of equal gauge is doubled So if 10 wire is too large two 13 wires can be substituted or four 16 wires can be used for the same effect SOLVING OUTPUT PROBLEMS Sometime...

Page 19: ...er protection A com mon approach is to put a single fuse in series with the output of each channel This makes installation conve nient because there is only one fuse protecting the loads on each output The main disadvantage of this approach becomes obvious if the fuse blows because none of the loads will receive any power A better approach is to fuse each driver independently This allows you to ap...

Page 20: ...r example the Enable indicator will remain lit during unusual conditions that would cause the amplifier s protection systems to put a Fig 4 1 Indicators high voltage power supply in standby mode see Sec tion 4 3 2 The amber ODEP indicators confirm the normal op eration of Crown s patented Output Device Emulation Protection circuitry During normal operation they glow brightly to show the presence o...

Page 21: ...off with the first indicator state There is no power to the amplifier All other conditions in the table will occur with the En able indicator turned on It is important to note the pos sible states of the indicators in the rare event that you experience a problem This can greatly aid in deter mining the source of problems Please contact your lo cal Crown representative or our Technical Support Grou...

Page 22: ...er activate transformer thermal pro tection as long as it is operated within rated conditions see Section 6 Specifications One reason is that ODEP keeps the amplifier working under very severe conditions Even so higher than rated output levels ex 4 3 Protection Systems Macro Tech amplifiers provide extensive protection and diagnostics capabilities Protection systems include ODEP standby mode fuses...

Page 23: ...h is located on the front panel so you can easily turn the amplifier on and off If you ever need to make any wiring or installation changes don t forget to disconnect the power cord The six steps listed next should be followed whenever you turn on the amplifier 1 Turn down the level of your audio source For example set your master mixer s volume to 2 Turn down the level controls of the amplifier i...

Page 24: ...e used to reset the breakers that protect the high voltage power supplies from overload If a breaker trips the IOC indicator for the affected channel will turn on see Figure 4 2 4 5 Filter Cleaning Dust filters are provided on the air intakes to the cooling system see Figure 2 1 If these filters become clogged the unit will not cool as efficiently as it should and may produce output levels that ar...

Page 25: ...dule is used the input signal first passes through the PIP s circuitry and then to the balanced gain stage 5 Technical Information 5 1 Overview Your Macro Tech amplifier incorporates several ad vanced technological features including real time com puter simulation of output transistor stress low stress output stages an advanced heat sink embodiment and the PIP2 Programmable Input Processor expansi...

Page 26: ...Macro Tech 602 1202 2402 Power Amplifiers Page 26 Reference Manual Fig 5 1 Circuit Block Diagram ...

Page 27: ...rea of the output transistor This output controls the translator stage previously mentioned removing any further drive that may exceed the safe operating area of the output stage Thermal sensor S100 gives the ODEP circuits vital infor mation on the operating temperature of the heat sink on which the output devices are mounted Should the amplifier fail in such a way that would cause DC across the o...

Page 28: ... sensitivity Macro Tech 2402 83 1 12 or 38 dB 0 5 dB at 0 775 volt sensitivity 46 1 12 or 33 dB 0 5 dB at 1 4 volt sensitivity Power Output Power The following are guaranteed minimums for standard 1 kHz power from 120 VAC 60 Hz North American units For more information or specs on interna tional units see the power matrices that follow Macro Tech 602 Stereo mode both channels driven 400 watts into...

Page 29: ... single channel Channel1controls are active Channel 2 should not be used Parallel Mono Unbalanced single channel Channel 1 controls are active Channel 2 controls are bypassed Protection Macro Tech amplifiers are protected against shorted open or mismatched loads overloaded power supplies excessive temperature chain destruction phenomena input overload damage and high frequency blowups They also pr...

Page 30: ...s single channel driven or that they are specified with fuses bypassed Each of these statements effectively removes any performance guarantee In fact some manufacturers use these tactics to generate large power numbers and they don t even print a disclaimer We take a different approach at Crown our amplifiers are guaranteed to meet or exceed their specifications for three years Further because our...

Page 31: ...Macro Tech 602 1202 2402 Power Amplifiers Page 31 Reference Manual Fig 6 2 Macro Tech 1202 Minimum Power Matrix Fig 6 3 Macro Tech 2402 Minimum Power Matrix ...

Page 32: ...5 THD can result in output power levels that are higher than those listed in the maximum power matrices Fig 6 4 Macro Tech 602 Maximum Power Matrix Maximum Power Notes All maximum power specifications are based on 0 1 regulated AC mains and an ambient room temperature of 70 F 21 C International units with multi tap transformers are specified for the best case transformer tap nor mally 240 VAC 60 H...

Page 33: ...Macro Tech 602 1202 2402 Power Amplifiers Page 33 Reference Manual Fig 6 6 Macro Tech 2402 Maximum Power Matrix Fig 6 5 Macro Tech 1202 Maximum Power Matrix ...

Page 34: ...Hz 2 1 0 1 2 3 4 dB 5 6 7 4 ohm 8 ohm 1 watt 504 0 126 8 31 8 MILLIOHMS 8 0 2 0 6 dB 20 100 1 K 10 K 20 K 400 200 100 0 600 800 1000 1200 1400 FREQUENCY Hz 8 ohm 10 100 1 K 10 K 100 K FREQUENCY Hz 2 ohm Fig 6 7 Typical Frequency Response Fig 6 8 Typical Damping Factor Fig 6 9 Typical Output Impedance ...

Page 35: ...ifiers Page 35 Reference Manual 45 0 45 100 1 K 10 K 20 K FREQUENCY Hz 100 1 K 10 K 20 K FREQUENCY Hz dB TEF Measurement Fig 6 11 Typical Crosstalk for the Macro Tech 602 TEF Measurement 51 57 63 69 75 81 Fig 6 10 Typical Phase Response ...

Page 36: ...ence Manual 100 1 K 10 K 20 K FREQUENCY Hz dB 100 1 K 10 K 20 K FREQUENCY Hz dB Fig 6 12 Typical Crosstalk for the Macro Tech 1202 66 72 78 84 90 96 102 TEF Measurement Fig 6 13 Typical Crosstalk for the Macro Tech 2402 60 66 72 78 84 96 90 TEF Measurement ...

Page 37: ...is 1 Here are the equations used to calculate the data pre sented in Figures 7 1 through 7 3 AC Mains Power Draw watts Total output power with all channels driven watts x Duty Cycle Amplifier Efficiency 65 Quiescent Power Draw watts The quiescent power draw of 90 watts is a maximum value and includes power drawn by the fan The follow ing equation converts power draw in watts to current draw in amp...

Page 38: ...wer Amplifiers Page 38 Reference Manual Fig 7 3 Macro Tech 2402 Power Draw Current Draw and Thermal Dissipation at Various Duty Cycles Fig 7 2 Macro Tech 1202 Power Draw Current Draw and Thermal Dissipation at Various Duty Cycles ...

Page 39: ...uiresanIQ2interfaceandacomputer for initial setup IQ P I P SMT SmartAmp offersimpressivenewfeatures unavailable elsewhere The processing speed is substan tiallyenhancedoverotherdesigns Aprogrammablepower supplygateconservesenergybyshuttingofftheamplifier s high power supplies until an audio signal is present The user may define error reporting conditions of the amplifier There is much greater flex...

Page 40: ...a bass cut high pass filter for each channel The equalization and bass cut filters can be bypassed if desired Balanced inputs and daisy chain outputs use removable barrier block connectors for quick solderless connections P I P BEQX Same as P I P BEQC but with XLR connec tors OUT PUSH Programmable Input Processor P I P 3 1 2 GND CH 2 CH 1 PUSH OUT IN IN P I P BP1CTheP I P BP1Cisaversatile stereoba...

Page 41: ...ed through the Crown Service Parts Department For more informa tion contact your local Crown dealer or Crown s Techni cal Support Group Fig 8 4 Installing a Level Control Shaft Lock P I P FXT uses balanced 1 1 transformers to isolate the source from the inputs It comes with balanced female 3 pin XLR connectors P I P PA permits the unique capability of adding one mic lineinputdirectlytoeachchannelo...

Page 42: ...or warranty service we will pay for ground shipping both ways in the United States Contact Crown Factory Service or Technical Support to obtain prepaid ship ping labels prior to sending the unit Or if you prefer you may prepay the cost of shipping and Crown will reimburse you Send copies of the shipping receipts to Crown to receive reimbursement Factory Service Shipping Instructions 1 When sending...

Page 43: ..._________________ ______________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________ __________________________________________________________________...

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