PLX2 User Manual - American Musical Supply
Contents
1. 21 pounds 9 5 kg net 26 pounds 11 8 kg shipping 1 NOTE Due to special construction to meet EN 6100 CE models may have 5 12 0 5 dBw less power and 1 2 Ib 0 6 kg more weight U S patent no 5767744 and patents pending SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE 13 WWwW americanmusical com Appendix A Speakon Wiring Reference Amplifier connection 4 gt To loudspeaker Two wire single channel connection Four wire two channel connection NOTE Ensure proper polarity when connecting bridge mode output Bridge mode connection 14 WWw americanmusical com WWw americanmusical com How to Contact OSC Audio Products Como comunicarse con QSC Audio Products Comment prendre contact avec QSC Audio Products Kontaktinformationen f r QSC Audio Products Hk A OSC Audio Products Mailing address RAs OSC Audio Products Inc 1675 MacArthur Boulevard Costa Mesa CA 92626 1468 USA Main Number Sales amp Marketing Customer Service Sales amp Marketing FAX Customer Service FAX www qscaudio com info qscaudio com service qscaudio com 714 754 6175 714 957 7100 or toll free USA only 800 854 4079 714 957 7150 or toll free USA only 800 772 2834 714 754 6174 714 754 6173 OSCE OSC Audio Products Inc 1675 MacArthur Boulevard Costa Mesa California 92626 USA 2006 QSC and the QSC logo are registered with the U S Patent2. 4 Ohms x2 0 9 8 7 12 3 21 3 sional clipping Use this rating for most applications 2 Ohms x2 0 9 13 0 19 7 33 2 1 3 power pink noise represents severe program with heavy PLX 2502 8 Ohms x2 0 9 9 0 8 2 19 9 clipping 4 Ohms x2 0 9 15 12 6 25 0 e Full power sine is continuous sine wave driven at 1 clipping 2 Ohms x2 _0 9 Ti 19 0 37 0 ePLX 1802 PLX 2502 PLX 3102 and PLX 3602 models Thermal J PEX3102 8 Ohms x2 0 9 6 0 10 7 21 0 or overcurrent cutback limits duration of full power 2 ohm 4 Ohms x2 0 9 a5 16 5 33 0 operation Long term active limiting to 30A at 120V 2 Ohms x2 0 3 14 0 27 0 55 0 e PLX 1104 and PLX 1804 models Long term circuit breaker lim 8 Ohms x2 0 9 1 13 0 25 0 ited to 15A at 120V 4 Ohms x2 0 9 115 19 5 40 0 2 Ohms x2 0 9 18 0 31 0 63 0 WWw americanmusical com Input Configuration Switch PLX 1802 2502 3102 3602 models only Select the input configuration by sliding the switch to the position which corresponds with the Input Configuration selector switch desired input configuration INPUT 7 CONFIGURATION e Bridge upper position BRIDGE e Stereo middle position STEREO a PARALLEL e Parallel lower position Stereo Mode Each channel remains independent and each may be used for a different signal Parallel Mode This setting connects both inputs together One input signal feeds both chan nels Do not connect different sources to each input Each channel s Gai
3. e n Bridge Mono the amplifier may shut down for several seconds if driven too hard into loads less than the rated 4 ohm minimum e f the amplifier overheats due to prolonged overload or high external temperature it will mute for about 30 seconds with the fan running at full speed for maximum cooling Make sure the rear intake is getting a free flow of cool air PLX 1104 1804 models e These models have completely automatic internal protection that maintains operation even under extreme conditions e Overdrive distortion will cause the red Clip LED to flash If driven constantly into clipping internal circuitry smoothly reduces the volume to minimize distortion and stress e These models are rated for 4 ohm loads Do not use more than two 8 ohm speakers per channel Using too many speakers may trigger limiting and cause a loss of volume e nternal current limits protect the output transistors against overloading Moderate overloading will trigger clip limiting and smoothly reduce output level to prevent distortion Severe overloading such as driving the amplifier hard into a shorted speaker wire may cause short rapid muting Check the speaker wiring for shorts if the amplifier chatters e Overheating may occur due to prolonged overdrive or high external temperature This will first trigger thermal limiting reducing volume so that the amplifier remains below Its thermal limit and keeps running If input signals are still too high the am
4. red illumination while the amp Is being used Indicates either thermal muting or a shorted output e f the amplifier overheats the fan will run at full speed and operation should resume within one minute Allow the fan to run and make sure the amplifier ventilation is adequate e A shorted or overloaded output circuit will cause excessive Clip flashing and possible overheat Ing e f distortion is audible without a Clip indication the problem is either before or after the ampli fier Check for damaged speakers or overloaded signal source The amplifier Gain control should be in the upper half of its range to prevent input overload SIGNAL SIG 10 GREEN Normal indication e The SIG signal indicator illuminates when the input signal exceeds 35 dB and the 10 10 dB a indicator illuminates when the signal exceeds 10 dB LED indicators on PLX 1802 PLX 2502 PLX 3102 and PLX 3602 models If no indication eCheck Gain settings and increase gain if necessary Check input connections and audio source for signal If the Clip LED illuminates with little or no Signal indication check the output wiring cLIP for shorts 10 Abnormal indication e f the SIG or 10 LED illuminates with no signal input there may be system oscillations or some sic other malfunction Disconnect the load and fully reduce the gain If the LED remains on the O amp may need servicing PWR BRIDGE MONO BR M and PARALLEL PAR PLX 180
5. 2 2502 3102 3602 models only BR M PAR e Each channel pair has a AMBER LED for Bridge Mode and a AMBER LED for Parallel mode These show how the rear panel INPUT CONFIGURATION switch is set see nput Configuration Switch In Stereo mode both LEDs should be OFF In bridge mode the BR M indicator will be illuminated In parallel mode the PAR indicator will be illuminated WWwW americanmusical com Gain Controls Gain controls and LED cluster on PLX 1104 and Turn the GAIN controls clockwise to increase gain and PLX 1804 models counter clockwise to decrease gain CLIP The GAIN controls are marked in dB of attenuation 10 There are 21 detents for repeatable adjustments The SIG 12 10 a upper 14 steps are about 1 dB each and settings should normally be made within this range The range below 14 dB should not be used for normal program levels as the input headroom could be exceeded but can be used X y for testing at reduced levels At the minimum setting a e oO 2 o the signal is completely cut off power of the amplifier They adjust its sensi Gain controls and LED cluster on PLX 1802 Note The GAIN controls do not adjust the A tivity to input signals PLX 2502 PLX 3102 and PLX 3603 models LX ad aa oe e dqpeO BRM PAR e qBeO Power Switch Push in on the top of the rocker switch to apply AC mains power to the amplifier Push in on the bottom of the rocker switch to turn the amplifier off POWER
6. E THE RISK OF ELECTRIC SHOCK DO NOT REMOVE THE COVER NO USER SERVICEABLE PARTS INSIDE REFER SERVICING TO QUALIFIED PERSONNEL WARNING To prevent fire or electric shock do not expose this equipment to rain or moisture FCC INTERFERENCE STATEMENT NOTE This equipment has been tested and found to comply with the limits for a class B digital device pursuant to part 15 of the FCC rules These limits are designed to provide reasonable protection against harmful interference in a residential installation This equipment generates uses and can radiate radio frequency energy and if not installed and used in accordance to the instructions may cause harmful interference to radio communications However there is no guarantee that interference will not occur in a particular installation If this equipment does cause harmful interference to radio or television reception which can be determined by switching the equipment off and on the user is encouraged to try to correct the interference by one or more of the following measures eReorient or relocate the receiving antenna e ncrease the separation between the equipment and the receiver e Connect the equipment into an outlet on a circuit different from that to which the receiver is connected e Consult the dealer or an experienced radio or TV technician for help Copyright 2006 QSC Audio Products Inc QSC is a registered trademark of QSC Audio Products Inc OSC and the QSC logo are regist
7. PLX 2502 PLX 3102 PLX 3602 320 425 550 725 330 450 600 715 525 675 900 1100 575 750 1000 1250 900 1250 1550 1800 1100 1400 1900 2500 1200 1500 2100 2600 1800 2500 3100 3600 lt 0 02 all models 20 20k Hz 0 5 dB all models 107 dB 106 dB 107 dB 107 dB 31 9 dB 34 0 dB 35 0 dB 35 9 dB 1 28 4 4 dBu 1 15 3 4 dBu 1 23 4 0 dBu 1 25 4 2 dBu AB AB H AB H AB H 10k ohms unbalanced 20k ohms balanced 2 dB at 4 ohms gt 500 Short circuit open circuit thermal ultrasonic and RF protection Stable into reactive or mismatched loads Continuously variable speed fan back to front air flow through heat sink array AC POWER switch Gain controls each channel 21 detents Input Configuration Switch Stereo Parallel Bridge Clip Limiters On Off Subwoofer Switch 100 Hz Low Cut Full Range 100 Hz High Cut each channel LF Switch 33 Hz Low Cut Full Range 1 each channel POWER blue SIGNAL green x 2 10 dB green x 2 CLIP red x 2 BRDG amber PAR amber 1 4 inch TRS and female XLR 20k ohm balanced 10k ohm unbalanced Speakon connectors Ch 1 4 wires Ch 1 Ch 2 Ch 2 2 wires Ch 2 only Binding posts Turn on turnoff muting DC fault blocking Clip limiting infrasonic filter 3 dB at 5 Hz Refer to rear panel serial number label Configured at factory for 100 120 or 220 240 VAC 50 60 Hz 19 0 48 3 cm W 3 5 8 9 cm H 13 9 35 3 cm D from front mounting rails including rear support ears
8. WWw americanmusical com PLX Series Professional Audio Amplifiers User Manual 4 ohm minimum impedance models with Speakon output terminals PLX 1104 PLX 1804 2 ohm minimum impedance models with Speakon and binding post terminals PLX 1802 PLX 2502 PLX 3102 PLX 3602 II l f HINI nN Ii Y i HH IT S an N zy 1 V UA TD 000214 00 Rev B WWw americanmusical com Important Safety Precautions amp Explanation of Symbols 1 Read these instructions 2 Keep these instructions 3 Heed all warnings 4 Follow all instructions 5 WARNING To prevent fire or electric shock do not expose this equipment to rain or moisture Do not use this apparatus near water 6 Clean only with a dry cloth 7 Do not block any ventilation openings 8 Do not install near any heat sources such as radiators heat registers stoves or other apparatus including amplifiers that produce heat 9 Do not defeat the safety purpose of the polarized or grounding type plug A polarized plug has two blades with one wider than the other A grounding plug has two blades and a grounding prong The wide blade or third prong are provided for your safety If the provided plug does not fit your outlet consult an electrician for the replacement of the obsolete outlet 10 Protect the power cord from being walked on or pinched particularly plugs convenience receptacl
9. When turned on the blue PWR indicator LED and the red CLIP indicator LED will illuminate after a few seconds the red CLIP indicator will extinguish ON WWw americanmusical com J rotection Systems Both amplifier platforms are fully protected against adverse conditions but their behavior and user adjustments are different PLX 1802 2502 3102 3602 models eClip Limiting may be switched on the rear panel to prevent severe overdrive This protects speakers and somewhat reduces the load on the amplifier e nternal current limits protect the output transistors against overloading Peak limiting may occur at full output if using more than four 8 ohm speakers per channel or if the speaker wiring is shorted The red Clip LED will flash brightly and the ampli fier may sound distorted If the amplifier is driven hard under these conditions the current limit will be further reduced Causing an increase in distortion If the amplifier appears to be losing power during peaks check the speaker wiring and number of speakers Using Clip Limiting will reduce this distortion but for best results do not exceed the rated loading e f the amplifier stops completely for several seconds after a very loud signal it may be overloading the AC service This only occurs if the AC voltage sags more than 30 and will be more likely if driving many speakers at once Use short heavy gauge AC cables and do not plug too many amplifiers into a single outlet
10. and Trademark Office
11. empt to connect more than one Input signal to a given channel Balanced connections are recommended to reduce AC hum and interference espe cially with long cable runs Unbalanced connections may be suitable for short cables The signal s source impedance should be less than 600 ohms Input Pinouts Balanced inputs Connect to the plug as shown TRS Unbalanced inputs Connect to the plug as shown If using an XLR connector Pin 3 and pin 1 must be connected with a jumper as shown If using a TRS connector the ring and sleeve must be connected with a jumper If a TS connector is used the Sleeve will provide the jumper when inserted into the input jack TRS TS Input connectors and pinout chart PLX1802 shown abe CH1 INPUTS a 5 a CH2 PINOUT D TIP P2 RNG P3 INPUT IMPEDANCE 20K BALANCED SLV P1 gt 10K UNBALANCED PLX 1104 and PLX 1804 models can parallel the input signal to both channels by using a jumper from one channel to the next eConnect the input signal to either of Channel 1 s input connectors eConnect a jumper from Channel 1 s unused con nector to either of Channel 2 s input connectors Input signal INPUTS SLV P1 7 INPUT IMPEDANCE 10K UNBALANCED cH TRS to TRS jumper from Channel 1 to Channel 2 WWwW americanmusical com Outputs The PLX 1104 and PLX 1804 models are equipped with Speakon output connec
12. ered with the U S Patent and Trademark Office speakon is a registered trademark of Neutrik Inc All trademarks are the property of their respective owners WWw americanmusical com Introduction Thank you for purchasing this OSC power amplifier Please read the following directions to obtain the best results This manual covers all models of the PLX series Illustrations show the PLX 1804 to be representative of the PLX 1104 and 1804 models while the PLX 3602 illus tration is representative of the PLX 1802 PLX 2502 PLX 3102 and PLX 3602 models The PLX 1104 and PLX 1804 models feature e4 ohm minimum impedance e Speakon loudspeaker connections e OSC PowerLight high performance compact and light weight switching power supply e Complete amplifier protection eXLR and 1 4 inch TRS balanced input connectors e Gain controls are recessed and 21 step detented e Active inrush current limiting eliminates need for power sequencing e ED indicators for power input signal presence 10 dB and clip protect e Rear chassis tabs and front panel design protect controls and connectors In addition the PLX 1802 PLX 2502 PLX 3102 and PLX 3602 models feature e2 ohm minimum impedance e Bridgeable output e Binding post loudspeaker connections Clip limiter e 33 Hz low frequency filter e ow cut full range high cut selector e Stereo bridge mode parallel input selector eFront panel LED indicators for parallel and bridge modes Unpacking Factory pac
13. es and the point where they exit from the apparatus 11 Use only attachments accessories specified by QSC Audio Products Inc 12 Use only with hardware brackets stands and components sold with the apparatus or by QSC Audio Products Inc 13 Unplug the apparatus during lightning storms or when unused for long periods of time 14 Refer all servicing to qualified service personnel Servicing is required when the apparatus has been damaged in any way such as power supply cord or plug is damaged liquid has been spilled or objects have fallen into the apparatus the apparatus has been exposed to rain or moisture does not operate normally or has been dropped The exclamation point within an equilateral triangle is intended to alert the user to the presence of important operating and main tenance servicing instructions in this manual The lightning flashes printed next to the OUTPUT terminals of the amplifier are intended to alert the user to the risk of hazardous energy Output connectors that could pose a risk are marked with the lightning flash Do not touch output terminals while amplifier power is on Make all connections with amplifier turned off The lightning flash with arrowhead symbol within an equilateral triangle is intended to alert the user to the presence of uninsu lated dangerous voltage within the product s enclosure that may be of sufficient magnitude to constitute a risk of electric shock to humans CAUTION TO REDUC
14. ked carton contains e PLX amplifier e User s manual e Adhesive rubber feet for non rack mount applications e EC type detachable power cord Use the same type carton when shipping the amplifier Front Panel ULNA OJ lt A x Ai oaa wd pre PLX 3602 U prama PROFESSIONAL er POWER AMPLIFIER l Kii SE STE AHS A ES EE EE HE HE N AAAI UAH We We TTT NN j j jjj j j als l j j i mmlm Ly Sols ATES CEES ESCH Cry ey va 1 Power Switch 3 LED Indicators 2 Cooling Air Exhaust Vents 4 Gain Controls WWwW americanmusical com Rear Panel 1 3 44 56 aes i J L JE JE Wore eh USE CH1 INPUT AND CH1 FILTERS USE THE BRIDGE MONO aoc PLX POWER AMPLIFIER TO REDUCE THE RISK OF ELECTRONIC SHOCK THE GROUND CONNECTION OF THE AC PLUG MUST BE MAINTAINED ry CCC fo mu ee ee INPUTS DAE Nal sw PIL INPUT IMPEDANCE 20K BALANCED 10K UNBALANCED oOo N J 1 Input Configuration switch 2 1 4 inch TRS input connectors 3 XLR female input connectors 4 Low Frequency Filter switches 5 Speakon outp
15. left for driving top boxes applies 100 Hz low cut e Set the switch to the middle position for full range loudspeakers e Set the switch to the rightmost position for driving subwoofers Low Frequency filter selection table 33 Hz low cut FULL Switch Unless the loudspeaker has extended low frequency capabil re oe Eo ity we recommend setting the filter to the 33 Hz setting The filter should only be set to FULL Load Switch Switch turned off for driving subwoofers Check the loudspeaker s specifications and use the 33 Hz filter S os ubwoofer Sub Full or 33 Hz if the loudspeaker s low frequency capability does not extend below 33 Hz Small Full Range Full 33 Hz e Set to FULL when driving loudspeakers that have low frequency capability below 33 Hz or 10 and smaller woofer in studio monitoring applications Large Full Range Eul Full or 33 Hz e Set to 33 Hz for loudspeakers which are not rated for frequencies below 33 Hz 12 and larger woofer Studio Reference Full Full WWw americanmusical com Inputs Each channel has a balanced XLR female and 1 4 inch TRS input The XLR and TRS connectors for each channel are wired in parallel and can be used for daisy chain ing an input signal to additional amplifiers The input impedance is 20k ohm balanced or 10k ohm unbalanced Both XLR and TRS inputs are connected with standard cables and can be changed quickly Pinouts are marked on the rear panel Do not att
16. musical com Cooling Air flow in QSC amplifiers Cool air is drawn into the Air flows from the rack into the back of the amplifier and out the rear of the amplifier by the cooling fan Warm air exits front This keeps the rack cool The fan automatically runs faster the front of the amplifier when the amp Is working hard A Do not block the front or rear air vents AC Mains Connection Connect AC power to the IEC socket on the back of the amplifier NOTE Turn off the AC power switch before connecting AC power the socket then push the connector firmly into the IEC The correct AC line voltage is shown on the serial number socket until fully seated label on the rear panel Connecting to the wrong line voltage may damage the amplifier or increase the risk of electric shock The rear chassis ear can be used to retain the IEC power A connector After inserting the IEC block into the recepta cle use a wire tie or similar device to secure the cord to the chassis ear AC Mains Current Draw 1 8 Power 1 3 Power Full Power Mi oe Fl leas T ae nee a a Model eer P pink noise pink noise an as E oad and output power level Units of measurement are FEto 5 onme 2 p 4 Ohms x2 0 9 8 0 124 21 0 NOTE Current draw shown is for 120 VAC line For 230 hosie l e oe A VAC models multiply values shown by 0 5 as PLX 1802 8 Ohms x2 0 9 5 0 7 12 6 e 1 8 power pink noise represents typical program with occa
17. n control and speaker Clip Limiter ON OFF switch connection remain independent CLIP LIMITERS Bridge Mode his setting combines both channels into a single channel with twice the output CH1 CH2 voltage Use only Channel 1 s input and Gain control Set Channel 2 s Gain control at minimum Mi A Use only one input when operating in parallel or bridge mode Low Frequency filter selection Clip Limiters PLX 1802 2502 3102 3602 models onl switches for each channel The amplifier has a clip limiter with an on off switch The limiter only responds to actual clipping i CHi1 and automatically compensates for load and voltage variations Clip limiting is generally recom TOP FULL Sie mended especially to protect high frequency drivers e Set the switch UP ON position to use Clip Limiting 3342 FULL e Set the switch DOWN OFF position to disable the clip limiter Low Frequency Filters PLX 1802 2502 3102 3602 models only FILTERS Each channel has independent filter selection of Full Range infrasonic filter only 33 Hz low cut CH2 100 Hz low cut or 100 Hz High Cut This allows tailoring the amplifier performance to that of the 100Hz 100Hz loudspeakers offering the best possible performance from the system Proper filtering reduces TOP FULL SUB distortion and prevents amplifier overload 33Hz FULL TOP FULL SUB Switch Select the type of loudspeaker being driven by each channel e Set the switch to the
18. ower loudspeaker load The INPUT CONFIGURATION switch must be set for BRIDGE mode Use only Channel 1 s input and Gain control Set Channel 2 s Gain control at minimum A OUTPUT TERMINAL SAFETY WARNING Do not touch output terminals while amplifier power is on Make all connections with amplifier turned off Risk of hazard ous energy PLX 1104 and PLX 1804 Output Connectors Do not use less than 4 ohm impedance loads with PLX 1104 and PLX 1804 models eae PINOUT 4OHMMIN w PUT impepance PLX 1802 PLX 2502 PLX 3102 and PLX 3602 Output Connectors Do not use less than 2 ohm impedance loads with these models Stereo amp 80 40 Y zov 2d Parallel Bridge 8QOY 40 7 24 WWw americanmusical com LED Indicators The LED indicators can be used to monitor system operation and identity common problems LED indicators on PLX 1104 and PLX POWER PWR BLUE 1804 models Normal indication cLip e AC switch ON LED will illuminate 10 If no indication eCheck AC power cord and AC outlet sic e Confirm that AC switch is in ON position on CLIP RED Normal indication e luminates whenever the amplifier is driven beyond full power The resulting distortion corre sponds to the brightness of the LED Distortion that causes only brief flashing may not be audi ble e During muting the red LED fully illuminates This occurs during normal On Off muting Abnormal indication e Bright
19. plifier may eventually mute for about 30 seconds with the fan at full speed for maximum cooling Make sure the rear intake is getting a free flow of cool air 11 WWw americanmusical com Specifications PLX 1104 PLX 1804 OUTPUT POWER Watts 20 20k Hz 0 05 THD 8 ohms Ch 1k Hz 0 1 THD EIA 8 ohms Ch 20 20k Hz 0 05 THD 4 ohms Ch 1k Hz 0 1 THD EIA 4 ohms Ch DISTORTION SMPTE IM FREQUENCY RESPONSE SIGNAL to NOISE unweighted 20 20k Hz VOLTAGE GAIN INPUT SENSITIVITY Vrms for rated power into 8 ohms OUTPUT CIRCUIT TYPE INPUT IMPEDANCE DYNAMIC HEADROOM DAMPING FACTOR 8 ohms AMPLIFIER PROTECTION COOLING CONTROLS Front Back LED INDICATORS CONNECTORS Input Output LOAD PROTECTION POWER REQUIREMENTS DIMENSIONS WEIGHT PLX 1104 PLX 1804 310 550 325 600 500 800 550 900 0 02 0 02 20 20k Hz 0 5 dB all models 108 dB 106 dB 32 5 dB 34 9 dB 1 18 3 7 dBu 1 20 3 8 dBu AB AB H 10k ohms unbalanced 20k ohms balanced 2 dB at 4 ohms gt 200 Short circuit open circuit thermal ultrasonic and RF protection Stable into reactive or mismatched loads Continuously variable speed fan back to front air flow through heat sink array AC POWER switch Gain controls each channel 21 detents AC circuit breaker POWER blue SIGNAL green x 2 10 dB green x 2 CLIP red x 2 1 4 inch TRS and female XLR 20k ohm balanced 10k ohm unbalanced Speakon connector
20. s Ch 1 4 wires Ch 1 Ch 2 Ch 2 2 wires Ch 2 only Turn on turn off muting DC fault blocking Clip limiting Infrasonic filter 3 dB at 5 Hz Refer to rear panel serial number label Configured at factory for 100 120 or 220 240 VAC 50 60 Hz 19 0 48 3 cm W 3 5 8 9 cm H 10 1 25 7 cm D from front mounting rails including rear support ears 13 pounds 5 9 kg net 18 pounds 8 2 kg shipping 1 NOTE Due to special construction to meet EN 6100 CE models may have 5 12 0 5 dBw less power and 1 2 Ib 0 6 kg more weight U S patent no 5767744 and patents pending SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE WWw americanmusical com Specifications PLX 1802 PLX 2502 PLX 3102 PLX 3602 OUTPUT POWER Watts 20 20k Hz 0 05 THD 8 ohms Ch 1k Hz 0 1 THD EIA 8 ohms Ch 20 20k Hz 0 05 THD 4 ohms Ch 1k Hz 0 1 THD EIA 4 ohms Ch 1k Hz 0 1 THD EIA 2 ohms Ch Bridge Mono 20 20k Hz 0 1 THD 8 ohms Bridge Mono 1k Hz 0 1 THD 8 ohms Bridge Mono 1k Hz 1 0 THD 4 ohms DISTORTION SMPTE IM FREQUENCY RESPONSE SIGNAL to NOISE unweighted 20 20k Hz VOLTAGE GAIN INPUT SENSITIVITY Vrms for rated power into 8 ohms OUTPUT CIRCUIT TYPE INPUT IMPEDANCE DYNAMIC HEADROOM DAMPING FACTOR 8 ohms AMPLIFIER PROTECTION COOLING CONTROLS Front Back LED INDICATORS CONNECTORS Input Output LOAD PROTECTION POWER REQUIREMENTS DIMENSIONS WEIGHT PLX 1802
21. tors for each channel PLX 1802 PLX 2502 PLX 3102 and PLX 3602 models are equipped with Speakon and binding post output connectors Wiring connections are shown on the back of the chassis Carefully note the markings and maintain consistent loudspeaker polarity for optimum system performance Speakon Output Connectors If making Speakon cables be sure to connect the loudspeaker wiring as shown on the chassis Channel 1 s Speakon provides 4 wire Ch 1 Ch 2 connection Channel 2 s Speakon provides 2 wire Ch 2 only connection Appendix A provides Speakon connection reference Stereo and Parallel Mode Connect each loudspeaker to its own chan nel of the amplifier as shown on the chassis label The INPUT CONFIGU RATION switch must be set for STEREO or PARALLEL mode Bridge Mode PLX1802 2502 3102 3602 models only Use Channel 1 s speakon for Bridge mode output connection Bridge mode configures the channel pair to drive a single high power loudspeaker load The INPUT CONFIGURATION switch must be set for BRIDGE mode Use only Channel 1 s input and Gain control Set Channel 2 s Gain control at minimum Binding Post Connectors PLX 1802 2502 3102 3602 models only Stereo and Parallel Mode Connect each loudspeaker to its own channel of the amplifier as shown on the chassis label The INPUT CONFIGURATION switch must be set for STEREO or PARALLEL mode Bridge Mode Bridge mode configures the channel pair to drive a single high p
22. ut connectors 6 Binding post output connectors Rack Mounting Use four screws and washers to mount the amplifier to the equipment rack rails To use the amplifier outside a rack attach the self adhesive rubber feet to the bottom For portable mobile or other applications where the rack assembly may be moved we strongly recommend support ing the rear of the amplifier A rear rack ear kit is available from QSC s Technical Services Group The cast front panel includes finger grips at each end mak ing lifting and setting into the rack more comfortable CONFIGUF f ON CH1 OZ TOP FULL SUB C SPEAKER CONNECTION WITH 4 OHM MIN IMPEDANCE ae CH1 o a bs 0 USE CH1 GAIN CONTROL FOR LEVEL SET CH2 GAIN TO MIN pd 3 FULL b ON 1 2 WH lt Z INPUTS _ _ FILTERS ins rg A BRIDGE Aam CH2 hy wW Ee TOP FULL SUB Ez cP f N timers CH2 I cHI cH2 PINOUT A _ Taz FULL On ON pa Ses OFF TIP P2 re BUT TCH 2 zonm min mpenance For stereo POS INOUT i i CH1 5 OF THE AC PLiwgg UST BE MAINTAINED MADE IN USA X 11 7 Cooling air inlet vents 8 Clip Limiter switch 9 Serial number plate 10 IEC type AC mains inlet 11 Circuit breaker resettable The front panel casting includes features for finger lifting and gripping at each end WWwW american
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