Phoenix Gold pm1400 User's Manual
Contents
1. 1400 Professional Stereo Power Amplifier PROFESSIONAL RISK OF ELECTRIC SHOCK DO NOT OPEN CAUTION CAUTION TO REDUCE THE RISK OF ELECTRIC SHOCK DO NOT REMOVE COVER OR BACK NO USER SERVICEABLE PARTS INSIDE REFER SERVICING TO QUALIFIED SERVICE PERSONNEL TRO oo eet Ooh Radia a Unpacking and Features and Specifications 2 Controls and 4 Installation Location and General Precautions 6 Mechanical 6 Rear Support for Road Applications 6 Thermal AC Power Magnetic Leakage 1 7 7 Input 7 Output Wine Installation continued cst Apidae ees Safety Information The lightning flash with arrowhead symbol within an equilateral triangle is intended to alert the user to the presence of uninsulated dangerous voltage within the product s enclosure that may be of sufficient magnitude to constitute a risk of electric shock to persons The exclamation point with2. change the input polarity of CH 1 and cross wire JP1 and JP2 to change CH2 see Figure 8 In Case of Difficulty If you re having trouble or suspect a problem with the pm1400 try some simple troubleshooting before contacting an Authorized Carver Professional Service Center No Sound No Power This is usually an indication of a power supply problem either the power line itself or the amplifier s power supply 1 pm1400 power is switched off 2 Linecord is disconnected 3 Poor fit between the plug and AC receptacle 4 Power off at AC receptacle check with tester or lamp 5 The amplifier is plugged into a switched outlet Verify that the outlet is live 6 pm1400 fuse has blown Check and replace fuse 7 The thermal breaker in the power transformer has opened Allow amplifier to cool and the breaker will reset itself Power On Low Output or No Output Low or no output problems are usually signal source bad cable or partial output short circuit related If the items listed below check out then the problem may be internal to the pm1400 1 The Input Level controls are set too low 2 Move the input connections to another amplifier that you know is working to verify that it is not a source problem 3 Check the speaker connections Be sure that there are no small strands of wire touching similar strands coming from the other wire in the cable 4 Make sure the speakers are functioning correctly 5 If you are using br
3. musical program 1500W at full power into 8 ohms continuous 2400W at full power into 4 ohms continuous Power Requirements 120V AC 60Hz USA and Canada Other volt ages as required for export 15 amp slo blo 120V 60Hz 8 amp Slo blo 230V 50Hz Sequence Receive Terminal 7V to 15V DC 50mA min current requirement 7 LED indicators per channel 1 green READY 5 yellow SIGNAL 1 red CLIP PROTECT 3 50 2U x 19 x 13 25 89mm x 483mm x 337mm Net Weight 34 2105 15 5kgs Shipping Weight 39165 17 73kgs Fusing Display Size H x W x D Due to ongoing research and development all specifications and features effective 7 98 are subject to change without notice 4 z fo a uw a Controls And Functions 1 POWER SWITCH When this switch is engaged the power turns ON and the READY indicators illuminate Be sure all connections are made and double checked before switching the power amplifier on 2 STANDBY LED This indicator illuminates when the power switch is turned OFF It also lets you know when the amplifier is connected to AC power When the power switch is OFF and the amplifier is plugged into an AC outlet the LED illuminates to indicate that AC power is available and the amplifier can be powered up When the power switch is ON the LED turns off 3 AC POWER FUSE This protects the amplifier from catastrophic failures that could damage internal circuitry Repeated fu
4. the associated components and connections and a copy of the purchase receipt Initial shipping costs are not paid by Carver Professional Return shipping costs will be pre paid if repairs were covered by the scope of this warranty YOU MUST RETAIN AND PROVIDE YOUR SALES RECEIPT TO OBTAIN COVERAGE UNDER THIS LIMITED WARRANTY The Warranty Period begins from the date of first consumer purchase from an Authorized Carver Professional Dealer LIMITATIONS OF IMPLIED WARRANTIES All implied warranties for merchantability and fitness for a particular purpose are limited in duration to the warranty period for your product unless otherwise provided by the state law EXCLUSION OF CERTAIN DAMAGES In no event shall Carver Professional be liable for property or any other incidental or coincidental damages which may result from the failure of this product If your Carver Professional product proves defective in material or workmanship the liability of Carver Professional shall be limited to the repair or replacement at the option of Carver Professional of any defective part STATE LAWS MAY DIFFER Some states do not allow limitations on how long an implied warranty lasts and or do not allow the exclusion or limitation of incidental or consequential damages so the above limitations may not apply to you This warranty gives you specific legal rights and you may have other rights which vary from state to state OTHER IMPORTANT PROVISIONS Carver Profess
5. speaker outputs will carry the signal that is connected to the CH2 input Bridged Mono The Stereo Mono switch is located on the Input Board which is connected to the input panel Connect the input signal to CH2 input input becomes disabled Connect the speaker s to the two speaker terminals The CH2 terminal is the hot non inverting side and the terminal is the low inverting side When connected in this way each channel sees one half the impedance of the speaker that is connected between them If an 8 ohm speaker is used each channel will see a 4 ohm load Therefore it is not recommended that any total speaker load lower than 8 ohms be connected in this mode of operation Use Dual Mono operation for lower impedances Note Be sure to set both of the input level controls to the exact same setting for equal power distribution per channel Switching the Level Defeat Switch off is a handy way to insure that both channels are operating at the same level CAUTION In bridged mono operation the output connections are actually a balanced output configuration This means that both output conductors have voltage present neither one should be grounded 70V Distribution Systems The pm1400 has sufficient output voltage capability in stereo mode to drive 70 volt distribution systems without using a step up transformer at the amplifier In this configuration the pm1400 delivers up to 475 watts per channel
6. than keeping the ventilation holes open If the amplifiers are rack mounted ensure that adequate ventilation exists in front of and behind the amplifier When several amplifiers are mounted together in a rack you may need to provide air inlets from the outside of the rack The pm1400 is fan cooled The fan is internally mounted so that it draws air in from the front and exhausts it out the rear This allows cool air from outside the amplifier to flow over and cool the power supply components located in front of the heatsinks before being warmed by the heat producing output devices thus providing optimum cooling efficiency The pm1400 may be stacked directly on top of other amplifiers without spacer panels If the amplifiers are used with other amplifiers ensure that the heat output from the other amplifiers doesn t interfere with the ventilation of the pm1400 or vice versa WARNING RISK OF HAZARDOUS ENG SPEAKER CONNECTIONS WARNING RISK OF HAZARDOUS SPEAKER CONNECTIONS USA MANUAL BEFORE USING MADE IN MANUAL BEFORE USING SEQUENCE SND RCV t SLEEVE A Shield TIP A Peeve 4 AC Power Considerations Ensure that the pm1400 is plugged into an outlet capable of supplying the correct voltage specified for your model and enough current to allow full power operation of all the amplifiers plugged into it The current demand of a power amplifier varies de
7. Eliminator circuit can be activated with a switch located to the right of the input panel Moving the switch down will deactivate the Clipping Eliminator allowing the amplifier to clip when driven beyond its maximum output capability See page 9 for additional information on the clipping eliminator circuit 10 CH1 CH2 INPUT CONNECTORS There are two methods for making input connections to the amplifier 1 4 inch TRS Tip Ring Sleeve connections are provided as well as professional XLR connectors They can be used with balanced signals or unbalanced signals see Input Wiring on page 7 for more information Note A high quality input transformer option is available for the pm1400 power amplifiers Contact your Carver Professional Dealer for details 11 FAN EXHAUST This opening releases hot air from inside the amplifier Be sure this vent is clear of obstructions for maximum cooling efficiency 12 CH1 CH2 SPEAKER OUTPUTS Multi way binding posts are used to connect the loudspeakers to the amplifier outputs The red terminals are the signal connection and the black terminals are the signal return connection The black terminals are internally tied together and to signal ground 13 POWER CORD Connect to a properly configured outlet providing the line voltage specified for your model Installation Location and General Precautions Observe the following precautions when choosing a location for your amplifier A Do no
8. f the signal and Pin 1 is ground see Figure 3B For unbalanced operation 1 4 inch phone plug Use a 2 conductor Tip Sleeve 1 4 phone plug The tip of the plug carries the signal and the sleeve is ground The ring connection in the jack is automatically grounded by the sleeve see Figure 4A XLR Pin 2 carries the hot non inverting side of the signal and Pin 1 is ground Short Pin to Pin 1 in order to reference the input differential amplifier for the correct gain see Figure 4B Note The gain remains the same regardless of whether the input is balanced or unbalanced Note The polarity of the balanced inputs can be reversed by changing four jumpers located on the Input Board See page 13 for more information Input Sensitivity The input sensitivity of the amplifiers are set at the factory to 1 5VRMs for rated output The input sensitivity can be changed to 0 775 VRMs by adding two jumpers on the Main Amplifier Board See page 12 of this owner s manual for more information SEQUENCE SND RCV e Output Wiring see your Carver Professional Dealer for information on Carver Professional Accessories Use heavy gauge wire for speaker connections The greater the distance between the amplifier and the speakers the larger the diameter the wire should be to minimize power losses across the wire and improve the damping of the speaker Wire thickness specifications or gauges get larger as the wire gets
9. he low frequencies through the other channel Order model CX2 e High quality balanced input transformers for applications that require electrical isolation Order model XFK Contact your local Carver Professional Authorized Dealer for information on these and other accessory modules that are available for the pm1400 amplifier LEVEL DEFEAT SWITCH CLIPPING ELIMINATOR SWITCH 4 z uw _ NORMAL STEREO MONO SWITCH FOR BRIDGED SEQUENCE OPERATIONS CONSULT SND RCV ER S MANUAL a ik o Ss amp c INPUT IMPEDANCE 25K OHMS EACH LEG TO GROUND TOTAL 50K OHMS BALANCED Figure 8 JUMPERS TO CHANGE INPUT POLARITY Servicing Instructions CAUTION To reduce the risk of electric shock do not perform any servicing other than that contained in the Operating Instructions unless you are qualified to do so Refer all servicing to qualified service personnel To remove the input panel and input board 1 Be sure the amplifier is switched OFF and UNPLUGGED from the AC socket 2 Remove the two screws located on either side of the input panel 3 Carefully pull the input board out of the chassis 4 See Figure 8 for the locations of the Level Defeat Switch Stereo Mono Switch Clipping Eliminator Switch and Input Polarity jumpers See Figure 9 for the location of the Input Sensitivity jumpers To reinstall the input board and
10. idged mono mode ensure that the Stereo Mono switch is set correctly 6 Use a voltmeter to determine if the power line voltage is dropping excessively when the amplifier is driven hard 4 z fo a uw a Playback Is Mixed with Hum 1 Check or replace the connecting cables 2 Make sure that each screw terminal connection is tight 3 Signal cables may have been routed too closely to AC cables power transformers motors or other EMI inducing device 4 Try connecting another source to the power amplifier inputs If the hum stops the problem lies with the original source component Distortion Distortion is usually caused by excessive loss in the input controls the mixer equalizer crossover can t produce enough output overdriving resulting in output clipping or current limiting caused by excessively low load impedances Check the setting of the Input Level controls If set too low the preceding piece of equipment may not have sufficient output to overcome the loss Check the speaker connections and verify that all screw connections are tight and that there are no stray strands of wire to cause short circuits Verify that the total load impedance presented to the amplifier is within the limits described in this manual for the mode of operation selected Care and Service Assistance Care Wipe off the pm1400 s front panel and chassis from time to time with a soft dry cloth If you have something s
11. in an equilateral triangle is intended to alert the user of the presence of important operating and maintenance servicing instructions in the literature accompanying the appliance Bridged Mono 8 Parallel 8 70 Distribution 8 9 Clipping Eliminator 9 evel Deleat ee aks 9 Power ON 9 Remote Turn On of One More Amplifiers 10 Operating Tips Using the 1400 11 Accessory OPTIONS 00 0 eeeeesseceseeeeeeeeneeeaeens 11 Servicing Instructions eee eeseeeseeeeeeenees 12 In Case of 13 Care and Service 15 14 Warranty 15 ntroduction Congratulations on your purchase of a new Carver Professional Power Amplifier It is backed by state of the art engineering and manufacturing techniques to bring you the best in quality craftsmanship and reliable performance The pm1400 is specially designed for pro sound applications It s rugged construction and low profile make it ideal for sustaining the abuses of the road with reliability and space saving economy The pm1400 is rated at 700 watts per channel into 4 ohms and 475 watts per channel into 8 ohms In bridged mono operation it i
12. input panel 5 Carefully insert the input board back into the access hole in the chassis 6 Reinstall the two screws to secure the input panel Stereo Mono Switch The Stereo Mono Switch is located on the input board which is attached to the input panel see Figure 8 Leave the switch centered for normal stereo operation move it to the left for Bridged Mono operation and move it to the right for Dual Mono operation Level Defeat Switch The Level controls can be bypassed by moving the switch located just above the input panel This will lock the amplifier into full gain as if the Level pots were fully clockwise Moving the switch to the right will return the Level controls to normal operation Input Sensitivity Modification The input sensitivity of the amplifier is set at the factory to 1 5VRMs for rated output To increase the sensitivity by 6dB to 0 775VRMS simply install jumpers JP100 CH 1 and JP200 CH2 which are located on the Main Amplifier Board see Figure 9 SMPLIFICN uc Ano ee bind mie QQ QQQ QQQ QQQ IANNLL 2 CUIANNLL 1 H CO oS Lo 2 Figure 9 u bV INFL SNS IVILY 3 bV INFU SLINSI IV IY Input Polarity The XLR input connectors on the pm1400 are shipped from the factory with pin 2 hot as indicated on the rear panel The polarity of the balanced inputs can be reversed by changing four jumpers located on the Input Board Cross wire JP3 and JP4 to
13. ional reserves the right to make changes in design and improvements to its products without the responsibility of installing such changes to improvements on products previously sold by Carver Professional We suggest that you attach your purchase receipt to this Warranty and keep both documents in a safe place Thank you for your choice of a Carver Professional Amplifier DECLARATION OF CONFORMITY We CARVER PROFESSIONAL INTERNATIONAL supplier s name 9300 N DECATUR PORTLAND OR 97203 USA address declare under our sole responsibility that the product pm1400 name type or model lot batch or serial number possibly sources and numbers of items to which this declaration relates is in conformity with the following standard s or other normative document s EN55013 title and or number and date if issue of the standard s or other normative document s if applicable following the provisions of 89 336 EEC EMC 4 z uw fo x Directive PORTLAND OR USAAppril 25 1997 Place and date of issue name and signature or equivalent marking of authorized person 1 10 DAY D Year Warranty Made In America t available in North America only A Division Of Phoenix Gold International Inc 9300 North Decatur Portland OR 97203 Tel 503 288 2008 Fax 503 978 3302 8100 0092B
14. isengage These fault conditions include excessive DC Offset excessive heatsink temperature and short circuits at the speaker output s Note The relays operate independently for each channel Therefore it is possible for one channel to operate normally while the other is in protect mode WARNING AVERTISSEMENT RISK OI IS ENERGY PROPER ENERGIE ELECTRIK IQUE DANGEREUSE NS SEE OPERATING VOIR LA INOTICE DE FONCTIONNEMENT CLASS 1 WIRING SHALL BE USED 6 BRIDGED OPERATION The STEREO MONO switch is located just behind the input panel This switch is used to select between NORMAL STEREO operation DUAL MONO operation or BRIDGED MONO operation For NORMAL STEREO operation use CH 1 and CH 2 inputs For DUAL MONO or BRIDGED MONO operation use CH 2 input only see page 12 for instructions on how to access the Stereo Mono switch and page 8 for more information about Bridged Operation 7 LEVEL DEFEAT SWITCH Locks the amplifier at its full gain capacity see page 12 for more information 8 SEQUENCE SND RCV These barrier strip screw terminals are used to link multiple amplifiers for sequenced turn on Connect the SND SEND terminal of the first amplifier to the RCV RECEIVE terminal of the second amplifier Connect the SND terminal of the second amplifier to the RCV terminal of the third amplifier and so on see page 9 and 10 for more information on Power ON sequencing 9 CLIPPING ELIMINATOR SWITCH The Clipping
15. les receipt Your receipt is extremely important to establish the duration of your Limited Warranty and for insurance purposes Next make a note of the serial number which is located on the back of the amplifier Record it in the space provided below for convenient reference Serial Number Purchased at Date Finally take a moment to fill out and return the Warranty Registration Card packed with the amplifier and return it to Carver Professional This will allow us to keep you informed about new products as they become available aw _ fo ac 1 9 0 21400 475W channel into 8 ohms 700W per channel into 4 ohms 1400W into 8 ohms bridged mono XLR and 1 4 TRS input connectors Accepts balanced or unbalanced lines Multi way binding post output connectors Independent CH 1 and CH 2 Level Controls with 11 detented positions External Level Control Defeat Switch Dual Mono mode for operating both channels with a single mono input Bridged Mono mode for combining the power of both channels into a single higher powered channel Input sensitivity set at 1 5Vrms from factory Internally configurable to 0 775 Vrms Internally configurable input polarity Internal connection points for add on accessories Power ON Sequencer High Efficiency Class H Amplifier Power on muting Independent CH 1 CH 2 Speaker relays will instantaneously disconnect if one of the following fault conditions a
16. pending on several factors including the impedance of the load the output level of the amplifier and the crest factor and duty cycle of the program material Under typical conditions reproducing rock music with both channels driven into a 4 ohm load to the point where musical peaks are just at the clipping point the amplifiers require the following average currents pm1400 6 7 amps for 120V versions 3 5 amps for 230V versions Magnetic Leakage Considerations The pm1400 may be mounted without concern for magnetic flux leakage within the confines of common sense For example it s not a good idea to mount any power amplifier near a microphone input transformer or magnetic storage media Input Wiring see your Carver Professional dealer for information on Carver Professional Accessories The 1 4 inch phone jacks and XLR connectors for the input signal can be used with either unbalanced 2 conductor or balanced 3 conductor cables Use shielded coaxial cable to conduct the signal from the source i e mixer equalizer CD player to the amplifier For balanced operation 1 4 inch phone jack Use a 3 conductor TRS 1 4 phone plug The tip of the plug carries the hot non inverting side of the signal the ring carries the low inverting side of the signal and the sleeve is ground see Figure XLR Use male XLR connector Pin 2 carries the hot non inverting side of the signal Pin 3 carries the low inverting side o
17. re detected D C Offset Over Temperature Short Circuit Additional protection circuitry includes Clipping Eliminator AC Line Fuse Power Connected Standby indicator NEXT 7 LED display per channel including Power Ready and Clip Protect indicators 2 speed Fan cooled 70 volt stereo direct drive operation C UL CE 1997 CSA approved BACK 2 z H L Continuous Average Output Power both channels driven 475 watts per channel into 8 ohms from 20Hz to 20kHz with no more than 0 1 THD 700 watts per channel into 4 ohms at 1kHz with no more than 0 1 THD Bridged mono operation 1400 watts into 8 ohms at 1kHz with no more than 0 1 THD Dual mono operation 950 watts into 8 ohms 1400 watts into 4 ohms from 20Hz to 20kHz with no more than 0 1 THD Dynamic Headroom gt 2 0dB Frequency Response 20Hz to 20kHz 0 75dB Channel Separation gt 65dB 1kHz Damping Factor gt 400 Input Impedance 25 kilohms unbalanced 50 kilohms balanced Low 1 5Vams for rated power into 4 ohms 116mVams for 1W into 4 ohms High 0 775 5 for rated power into 4 ohms 53mVaMs for 1W into 4 ohms Input Overload 18dB IM Distortion lt 0 1 Gain High 36 7dB 0 5dB Low 30 7dB 0 5dB Sensitivity Signal to Noise Ratio gt 100dB A weighted ref to rated power into 4 ohms Slew Rate 40V uS Bandwidth limited CMRR gt 80dB 1kHz Power Consumption 40W at idle 800W with
18. s Stereo Mono Clipping Eliminator and Level Defeat have been set to the mode that you want When you power the system up for the first time out of the carton it s a good idea to start with all of the amplifier level controls turned down counter clockwise then advance them slowly one at a time so that you can confirm that each amplifier channel is operating normally Be sure that the Input Level controls are set sufficiently high to allow the preceding device to drive the amplifier to full output For most installations this is wide open fully clockwise Once you have established settings it is a good idea to mark them down either on paper or on pieces of tape or sticky dots attached to the amplifier s panel In bi amplified multi amp systems it is a good idea to start with the low frequency amplifiers turned off or down and to check each frequency range from highest to lowest to ensure that each loudspeaker component is operating correctly Accessory Options The amplifiers have internal connections for installing a variety of accessories to provide additional features for specific applications Some of the options available are A precision attenuator which provides attenuation in 0 5dB increments down to 60dB Settings are made with a series of DIP switches on the module Order model AT2 A programmable two way electronic crossover that outputs the high frequencies through one channel t
19. s rated at 1400 watts into 8 ohms The sophisticated protection circuits designed into this amplifier will protect your system should an unexpected fault occur They also protect the amplifier from excessive temperature continuous current limiting and shorted outputs The balanced input uses a high quality high common mode rejection differential amplifier for exceptional hum and noise rejection The sequencing feature allows a rack of amplifiers to be powered up from a remote location The daisy chain connection scheme causes each amplifier to turn on in sequence preventing the large in rush current that can occur when an entire rack of amplifiers is turned on simultaneously This power amplifier was designed and manufactured by people with a lifetime commitment to providing the world s finest components for music and sound reproduction Thanks for placing your confidence in Carver Professional We know your amplifier will provide many years of dependable service and reliable sound reproduction Unpacking and Paperwork Carefully unpack the amplifier and keep the original carton and packing materials for future moving shipment or long term storage After opening the box please check for any visible signs of damage that were not apparent from the outside of the box If you do encounter what appears to be concealed damage please consult your Carver Professional Dealer before installing the unit Important Paperwork Make sure to save your sa
20. se blowing is a sign of internal distress See page 14 for information on authorized Carver Professional Service Caution Always replace with the same type and value fuse indicated next to the fuseholder 4 CH1 CH2 LEVEL CONTROLS These controls are used to adjust the input level of each channel When the controls are fully clockwise the amplifier operates at maximum gain Turning the controls counter clockwise attenuates the input signal The Level controls can be bypassed See back panel for Level Defeat Switch Note A precision attenuator is available as an option for the pm1400 which can be installed inside the amplifier see page 11 Contact your Carver Professional Dealer for details 5 CH1 CH2 STATUS INDICATORS These LEDs display information about the operation of the amplifier READY These LEDs illuminate green when the power is and the amplifier is ready to operate The READY LEDs illuminate red when the power switch 15 first turned on while the power supply is stabilizing prior to the speaker output relays switching in or when the amplifier is in protect mode SIGNAL These LEDs illuminate yellow when a signal is present at the Speaker Output jacks to provide an indication of output power relative to full power OdB CLIP PROTECT These LEDs illuminate red when the power switch is first turned on when the output begins to clip or whenever there is a fault condition detected that causes the output relay s to d
21. sessions and territories Please see your Carver Professional dealer or distributor for the correct warranty information in your area or locale WHAT IS COVERED THIS WARRANTY COVERS DEFECTS IN MATERIAL AND WORKMANSHIP ONLY This Limited Warranty DOES NOT extend to 1 Damage caused by shipment 2 damage caused by accident misuse abuse failure to perform owner maintenance or operation contrary to the instructions in the Carver Professional owner s manual 3 units on which the serial number has been defaced modified or removed and 4 damage resulting from modification or attempted repair by any other person than authorized by Carver Professional WHAT WE WILL PAY FOR Carver Professional will pay all labor and material expenses for items covered under this Limited Warranty See the next section concerning shipping charges WHAT YOU MUST DO TO OBTAIN WARRANTY SERVICE In the event your Carver Professional product requires service contact your Carver Professional authorized dealer contractor or contact Carver Professional ATTN Customer Service Dept 9300 N Decatur Portland OR 97203 or call the Customer Service Department directly at 503 978 3363 You will be directed to an Authorized Carver Service Station or receive instructions to ship the unit to the factory Please save the original shipping carton and packing materials in case shipping is required Please do not ship Parcel Post Include a complete description of the problem
22. t expose the unit to rain or moisture If a fluid or foreign object should enter the unit disconnect the power plug and contact an authorized dealer or service center Do not pull out the plug by pulling on the cord grasp the plug firmly B Protect from heat and allow adequate ventilation Place away from direct sources of heat such as heating vents and radiators All components produce some heat during operation so make sure that the ventilation holes are not covered and that air is allowed to circulate freely behind beside and above the unit Excessive heat is the single greatest source of both short term and long term component failure Mechanical Considerations The pm1400 requires two rack space units 3 5 and a depth of 15 inside the rack including the rear supports Secure the unit mechanically using four screws with washers to prevent marring the front panel Neoprene rubber washers are a good choice because they grip the screw head and prevent them from backing out when vibrated or transported Rear Support for Road Applications If the pm1400 is rack mounted and the rack is transported mechanical support for the rear of the amplifier is required This could take the form of a shelf across the rear of the amplifier or brackets that engage the rear of the unit This practice is recommended for all electronic instruments Thermal Considerations When the pm1400 is used free standing no thermal considerations are necessary other
23. the signal is reduced to keep the output just below clipping The Clipping Eliminator circuitry is inactive when the unit is shipped from the factory but can be activated with the Clipping Eliminator Switch located to the right of the input panel Note If the Input Level control s are turned down far enough a sufficiently large input signal can drive the input differential amplifier into clipping The Clipping Eliminator circuit cannot remedy this kind of clipping Likewise it has no effect on clipping that occurs prior to the amplifier inputs at the mixer or equalizer stage for example Level Defeat The Level controls can be defeated with a switch located above the input panel See page 12 for more information Power ON Sequencing The Sequencer allows remote turn on of any number of pm1400 amplifiers or other Carver Professional amplifiers equipped with sequencing capability In multiple amplifier applications the power on for each ace WARNING A ADE RISK OF HAZARDOUS ENERGY MAKE PROPER ENERG usa SPEAKER CONNECTIONS SEE OPERATING MANUAL BEFORE USING FoR BRIDGE foreharions CONSULT OWNERS MANUAL WARNING Toncouce me co NOT EXPOSE THiS EOUIPMENT TO ON Operating Tips Using the pm1400 Once the amplifier has been installed and wired into the system you are ready to use it Here are some tips to help you get the most from it Verify that the switche
24. thinner thus 14 gauge wire is thicker than 16 gauge wire Use the following as a guide up to 25 ft use 16 gauge up to 40 ft use 14 gauge up to 60 ft use 12 gauge up to 100 ft use 10 gauge up to 150 ft use 8 gauge up to 250 ft use 6 gauge 4 z a uw This will insure that the resistance of the speaker wire is less than 5 of 4 ohms resulting in transmission loss of less than 0 5 dB The multi way binding posts can accept spade lug bare wire or banana connections Be sure that all the fine strands of the wire are twisted together and contained within the connector If even one strand is loose and can touch the adjacent terminal a short circuit may result Class I NEC wiring must be used Polarity Loudspeakers must be connected with consistent polarity for correct phasing between them Incorrect phasing will do no physical harm but frequency response will be affected The key is to make sure that both speakers connected to the speaker terminals are hooked up the same way Connect at the speaker outputs to on the back of the speaker and at the speaker outputs to on the back of the speaker Dual Mono The Stereo Mono switch is located on the Input Board which is connected to the input panel Connect the input signal to CH2 input CH1 input becomes disabled Connect the speakers to the Speaker Outputs on the amplifier in the same way that you would for normal stereo operation Both
25. to the 70 volt system depending on the impedance of the total system As with all 70 volt systems transformers are still required at each loudspeaker The pm1400 can deliver 475 watts per channel into an 8 ohm impedance 61 6V line voltage The price for going direct is having to calculate the new transformer tap values at the new line voltage Since watts are proportional to the square of the voltage compute the correction factor by taking the ratio of the square of the line voltages Then multiply each tap value by this correction factor For example choose a transformer that has taps at 10W SW 2 5W when used in a 70 7 volt distribution Its new tap values when used with a pm1400 are computed as follows 1 Complete correction factor K K 61 6V7 70 7V 7591 2 Apply to tap value marked tap value K new tap value 10W 7591 7 591W SW 7591 3 796W 2 5W 7591 1 898W When used in a 70V distribution system this transformer s new tap values are 7 6W 3 8W and 1 9W Note that the 3dB power relationship between each tap still holds true Similarly maximum amplifier loading occurs when the sum of the NEW tap values equals the amplifier s output power 475W Clipping Eliminator This circuit prevents the input signal from exceeding the point where it would drive the amplifier into hard clipping It has no effect on the signal until it reaches the point where clipping would occur The larger the input signal the more
26. tubborn to remove use a mild dish soap or detergent sparingly applied to a soft cloth Don t use alcohol ammonia or other strong solvents Service Assistance We suggest that you read the Limited Warranty completely to fully understand your warranty service coverage Please promptly complete and return the Warranty Registration Card Also be sure to save the sales receipt in a safe place It will be necessary for warranty service If your CARVER Professional product should require service you may contact the CARVER Professional Technical Service Department by calling 503 978 3363 or by writing to us at the Factory address shown below We will then direct you to the nearest in our national network of Authorized Warranty Service Centers or give you detailed instructions on how to return the product to us for prompt action If you should have questions or comments please write to the Factory address given below Please include the model and serial number of your Carver Professional product your complete address and a daytime phone number N Carver Professional Service Department P O Box 83189 Portland OR 97283 Phone 503 978 3363 Fax 503 978 3302 Carver Professional reserves the right to improve its products at any time Therefore specifications are subject to change without notice Warranty Information Professional Power Amplifiers 5 years NOTE The following warranty is exclusive to the United States and its pos
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