QX4500 User Manual
Contents
1. Premium Amplifiers When cleaning the unit ensure it has been disconnected from any power source and that only a dry cloth is used Do not use any aerosol or liquid based cleaners Ensure all electronics are electronically grounded earthed to a safety ground terminal in order to avoid electric shock Do not ground any device to a gas pipe as this may result in disaster Never hang a speaker from only one rigging point Always use multiple points and attach a safety line to a point rated highly enough to support the weight of the speaker box Ensure all installation flying and or rigging is carried out by licensed professionals and adheres to your countries safety standards Servicing of all electronics should only be carried out by a certified Quest technician Please consult your original place of purchase to find the location of your nearest Quest service centre QX4500 User Manual IN When the Unit is in Operation e Ensure all amplifiers and mixers are turned down before switching the system on e If there is no sound ensure all cabling in the signal path is correct and where applicable the speakon connectors are locked into place correctly Should any of the following irregularities be found during use immediately switch off all electronics disconnect all power supplies and contact your original place of purchase e If you detect smoke or a burning smell coming from any device e If the unit is2. avoid losing it Then shift the front frame slightly to the right Then you should be able to remove the frame from the amplifier completely pull gently to avoid any bending of the front frame QX4500 User Manual 5 Troubleshooting 5 1 PROBLEM NO REACTION WHEN SWITCHING THE AMPLIFIER ON If nothing happens when switching the amplifier on i e the display stays totally dark no message inside the display please check following points e Check mains cable and plug e Confirm that the AC outlet works by plugging in any other device 5 2 PROBLEM NO SOUND If no sound can be heard on the outputs please check following DSP settings through the DSP control application e Input source selection e Input and output gain settings e Input and output limiter settings e If digital AES input signal is used please check AES signal source sampling frequency bit resolution and signal quality long cables 5 3 PROBLEM ERROR MESSAGE ERROR AMP SWITCHED OFF This error message indicates an internal error which forced the main power supply SMPS to be switched off This can be caused by e Detection of permanent DC on the outputs e Detection of amplifier stage malfunction protect e Detection of main SMPS error You can try to power cycle the amplifier to reset all amplifier stage detection circuits This might help in case the DC or amplifier fault was caused by an invalid input signal e g an extr
3. is able to circulate around it freely The efficiency of the cooling will depend on the immediate environment e g an enclosed rack direct sunlight If the amp is installed in a case the open area at the back of the case must be at least 140 cm This area should be in line with the amplifier If this cannot be achieved a forced ventilation system has to be used Note that continuous high power draw at low load impedance equal or less than approx 2 7 Q can drive the amplifier into thermal limitation So please check the amplifier temperatures on the display or in the DSP control application and reduce the input levels if necessary 3 5 SIGNAL INPUTS 3 5 1 Analog Input XLR Pin 1 Ground Pin 2 Hot inphase Pin 3 Cold out of phase Always use symmetrical balanced shielded cable to connect the amplifier 3 5 2 AES Input The digital AES XLR input accepts any AES EBU signals pro or consumer format in 16 to 24 bit resolution and 44 1 48 88 2 or 96 kHz sampling frequency This wide input frequency range of is guaranteed by an integrated sample rate converter SRC chip 3 6 REMOTE CONTROL NETWORK INPUT The Ethernet Link network connector allows you to access the QX4500 from a host computer for remote control firmware update and downloading DSP presets The QX4500 is configured by default to use DHCP for automatic IP address assignment in the network If not desired this feature can be set throug
4. physically damaged in any way e If the unit is malfunctioning eg no HF or LF output failing switches or intermittent operation etc Make no further attempt to operate the unit if it is found to be in any of the above conditions as this may result in fire or electric shock NOTE Quest Engineering is not responsible for any incorrectly flown installed or poorly positioned devices QX Series User Manual Premium Amplifiers QX4500 User Manual 1 Product Overview The suit of technologies employed in this amplifier represent the state of the art in digital processing and high current amplifier design Very sophisticated DSP control and networking communication capability make the QX4500 an authentic concert grade product without compromise Suited to both permanent installation or touring concert sound the QX4500 is a powerful asset that will take any speaker system to its full sonic potential The high speed 64 bit DSP processing and broad range of system control parameters are just the start of a long list of capabilities offered by this amplifier Please make yourself familiar with this user manual to get the full benefit and performance from the QX4500 The Quest Engineering manufacturer s warranty is our commitment to you that every Quest product is ready to give you many years of faultless service UNPACKING Please unpack and inspect your new amplifier for any damage that may have occurred duri
5. 2 Dual Channel Operation Two fully independent amplifier channels Stereo normal operating mode QX4500 Zin 2 Q for Dual Channel operation 3 7 3 Mono Bridge Operation One channel mono bridged operation QX4500 Zain 4 Q for Mono Bridge operation QX Series User Manual Premium Amplifiers In this mode the channel 2 amplifier stage processes the identical input signal than channel 1 but with reversed phase The channel 2 input signal is not used ignored The loudspeaker load must then be connected between the two positive channel outputs pin 1 and pin 2 using a specially configured SPEAKON connector cable This effectively doubles the maximum output voltage But please note that this also doubles the minimum allowed loudspeaker impedance Z min N WARNING In Mono Bridge Operation RMS output voltages can be as high as 200 VAC Wiring to the speaker loads must conform to NEC class 3 safety standards or its equivalent that meets all national and local electric codes All customer specific cables may only be manufactured by qualified suppliers personnel All cabling or rewiring work must be carried out by qualified personnel QX4500 User Manual
6. 4 Operation 4 1 USER INTERFACE ELEMENTS NOTE This chapter only describes the basic user interface operation and functions Please refer to the separate DSP Control manual for an explanation of the extensive Digital Signal Processing DSP options and advanced features offered by the remote application 4 1 1 Signal Protect LEDs multifunctional ax4soo PRESET 28 The Signal LEDs are illuminated in green when the voltage level at the output reaches approx 4V this corresponds to a power of 4 W into a 4 load The channel Signal LEDs are illuminated red when the amplifier is in Protect Mode Mute for example because of persistent DC voltage at the outputs or overheating When switching the amplifier on the Signal LEDs will also light red for a few seconds while the DSP is starting up along with the Clip LEDs In case the FuseProtect limiter is activated it is possible that the green Signal LED s will glow in orange or red colour for short periods of time while the amplifier is playing music See also chapter 4 5 5 Fuse Protection 4 1 2 Clip LEDs multifunctional QX4500 PRESET 28 The colour of the bi coloured LED changes between orange and red depending on the clip intensity Orange indicates light clipping red indicates heavy clipping SIGNAL CUP These LED s exclusively indicate hardware clipping of the power amplifier stage Possible internal DSP limitation and compression is n
7. 625 0 900 0 1225 0 1 600 0 2025 0 2500 0 3600 0 0 50 2 00 4 50 8 00 12 5 18 0 24 5 32 0 40 5 50 0 72 0 112 5 200 0 450 0 800 0 1250 0 1800 0 2450 0 Values in grey are calculated only The QX4500 is not able to deliver these output powers QX Series User Manual Premium Amplifiers Register Your Product Thank you for choosing Quest Please take the time to complete your product registration card which is included with the packaging Registering your Quest Engineering product will e CONFIRM YOUR WARRANTY e REGISTER YOUR PRODUCT e PROTECT YOUR NEW PRODUCT REGISTER ONLINE www questaudio net registration Quest engineering www questaudio net
8. HOT KEY FUNCTIONS STANDBY To set the QX4500 to standby mode simply press both 34 MENU buttons simultaneously for more than three seconds You will then be asked if you want to switch to Standby Mode Pressing the encoder knob without rotating it will then power down the main power supply of the QX4500 The standby function can of course also be controlled by the DSP Control remote application 4 3 STANDBY FUNCTION The QX4500 offers the possibility to set the amplifier into standby mode either from the user interface or by the DSP Control remote application In standby mode the QX4500 will power down it s main SMPS thus saving energy while at the same time staying accessible via network connection From the amplifier s user interface this function is accessible through a Hot Key function as described above Inside the DSP Control remote application you can access this function through the Unit menu QX4500 User Manual An additional feature is the automatic standby function which will set the QX4500 in standby mode if no input signal analogue and or AES is applied for a certain period of time This delay time can be set individually or switched off inside the DSP Control remote application through the Unit gt Configure gt Auto Standby menu NOTE H the amplifier has been set into standby through the Auto Standby function automatic wake up will only work if digital AES input signal is applied agai
9. QX4500 User Manual Trae v SY Y Y Y y VAO QX4500 E ES SS a oco DONA AE VE Ep Ep NES NES NES NES NENA REC E a E o PRI ES ES ES ES EEE QU O LAMY MAME MZ MAME MAMA S05 a o o gt das E AE AE AETA E engineering Contents Safety PIOCAUHONS spssasnisss vadia AAA vanes 1 Safety Symbol and Message CONVEeNti0NS ooococccccncncaccn 1 General CAUTION css esmas sa a ace SA RR A a A AE 2 When the Unitis in Operation sacanagem a sin a le cad ara SUA ele aaa Bad Ba a id 3 1 Product OVOIVIOW asas says gia pads IDENT Sawa CETME Ea IR Re Sa 4 2 INS AMP e di 5 SAO sas essa ii AA AO ARA AAN Ed DA 7 A OPONE NA As 11 5 Troubleshooter sea apart Resa neh A e SE 15 Gi Specificatons iv A E AA a aaa 16 7 Iypical Performance Diagrams s sa amais sm E A AE E eE B A E A ra 19 8 Unit Conversion Equations and Conversion Table ooocoocococoococrc eee ee 24 QX4500 User Manual Safety Precautions Safety Symbol and Message Conventions Please read the instructions in this section carefully before use i The safety symbols described below are used Ensure all instructions in this manual are in this manual to prevent bodily injury and observed as all information contained within property damage which could result from is very important mishandling Before operating this product please read this man
10. SP 20 5 dBu 8 2V us 11 6V RMS Peak Done through DSP in 0 25 dB steps Znin 2 Q for Dual Channel operation Z in 4 for Mono Bridge operation Inrush current limitation mains surge overvoltage protection temperature monitoring of heatsinks output DC protection temperature dependent SOA protection mains fuse protection output current limitation thermal limitation Clip Underimpendance Limiter FuseProtect Limiter Two temperature dependent speed controlled axial fans LEDs for signal protect and clip Two 3 pin XLR female analogue input connectors pin 2 hot inphase Two 3 pin XLR male passive loop through connectors One 3 pin XLR female AES digital input connector One Ethernet connector RJ45 One 4 pole SPEAKON connector for each output channel bi amping possible Dual channel Stereo mono bridge Analogue AES 24 bit 96 kHz Min 0 58 ms AES EBU 16 to 24 bit 44 1 48 88 2 or 96 kHz QX Series User Manual Premium Amplifiers QX4500 User Manual AC mains 230V AC 50 60 Hz for Europe 190 263V Approximative mains voltage range where 220V AC 50 60 Hz for China 190 263V the amplifier can be used Amplifier output 120V AC 50 60 Hz for US 95 134V power performance will decrease with lower mains voltages than the rated 230V 220V 120V and slightly increase with higher mains voltages Operating temperature 5 C to 55 C 41 F to 131 F Dimen
11. a pc o a E Exemplary rating plates for the three available amplifier variants Power supply data of all available variants Mains Power Operating A Output Condition current consumption oven 402 20 40 20 oo A 8w ow power off idle amp 1 3A 70W ow powered on 1220W ZOON per 8 5 10A 500W channel 1500 W Mains current draw and power consumption 230V 50 Hz measured with pink noise with crest factor of 12 dB to represent typical music signal For 120V mains operation the current values can be multiplied by 2 3 2 ON OFF SWITCH The On Off Switch is a rocker type switch It is located on the right side of the front panel To turn the amplifier on press on the upper part of the switch During power up the Clip and Signal LEDs from both channels will light up in red for a few seconds To turn the amplifier off press on the lower part of the switch Amplifier is switched off Amplifier is switched on NOTE This switch does NOT disconnect the amplifier from mains Disconnecting the amplifier from the main power supply can only be achieved by disconnecting the mains plug or by an external all pole disconnection e g a mains circuit breaker The mains plug or circuit breaker therefore has to be freely accessible at all times Disconnect the mains plug from the mains during a lightning storm or when the amplifier remains unused or unsupervised for a prolonged period of time The switch initiates sta
12. d Conversion Table 8 1 UNIT CONVERSION EQUATIONS Vans gt dBu Vans gt IBV BUS Vas ABV gt Vans RMS gt Peak Vans gt Output power QX Series User Manual Premium Amplifiers Value in V Level in dBu 20xlog 217 nus 0 7746 Value in V Level in dBV 20 log 22 Mavs 1 0000 je in dBu Voltage inV 0 7746 101 2 RMS Level in dBV Voltage inV 1 A a Voltage in Vaca 1 414 Voltage in Vous eak 7 2 Voltage in V Output inW ws utput power in 30 Voltage inV o Output inW us utput power in IG Voltage inV Output power in W E el QX4500 User Manual 8 2 CONVERSION TABLE ON OOO RAON E HA H amp Sl o fom fon o fel o o 90 100 120 150 2 83 5 66 8 49 ee 14 14 16 97 19 80 22 63 25 46 28 29 33 95 42 43 56 58 84 87 113 15 141 44 169 73 198 02 226 31 254 60 282 89 339 46 424 33 2 22 8 24 11 76 14 26 16 20 17 78 19 12 20 28 21 30 22 22 23 80 25 74 28 24 31 76 34 26 36 20 37 78 39 12 40 28 41 30 42 22 43 80 45 74 0 00 6 02 9 54 12 04 13 98 15 56 16 90 18 06 19 08 20 00 21 58 23 52 26 02 29 54 32 04 33 98 35 56 36 90 38 06 39 08 40 00 41 58 43 52 0 13 0 50 1 13 2 00 3 13 4 50 6 13 8 00 10 1 12 5 18 0 28 1 50 0 112 5 200 0 312 5 450 0 612 5 800 0 1012 5 1250 0 1 800 0 2812 5 0 25 1 00 2 25 4 00 6 25 9100 12 3 16 0 20 3 25 0 36 0 56 3 100 0 225 0 400 0
13. designed to be intuitive 1x 3000 W mono bridge 4 Q and allow for quick familiarisation 2x2250W dual channel 4 peak The combination of both power amplifier 2x 2000W dual channel 2 7 Q peak and on board DSP technologies used in the QX4500 provide the level of control and 2x1900W dual channel O 4 Q audio quality previously unavailable in all but 2x 1500 W Aue he 2O the most costly and complex professional applications The QX4500 a very powerful and complete speaker management system QX4500 amplifiers are fitted with highly with optimum flexibility and maximum control developed switch mode power supplies and security SMPS which significantly reduces the weight and size only 2U of the amplifier Since some of the externally mounted Using SMPS the 2 symmetrical supply controls have multiple functions it is voltages of the power amplifier are more important that users should familiarise stable than the power supplies used in themselves thoroughly with the entire range conventional amplifiers of controls O MUSEO EEN NPL NL MALAY NPL QX4500 To oo H H H us ss Us EOS ENS EOS EOS ss ss E Si CEROS ZN NES NES NN Sp Ep ZO pad KEE OE KOE KOE KOE E E Q lt 0 O gt O CEEE ES EEE Ea lt OmO gt D ss UNS ENS EPS UM Ms Us Ns ENS O O DS NDS NOS NETOS ONLTOS TOS ONLTOSONCTOS NETOS ONLTOS O QX Series User Manual Premium Amp
14. e compressor Link Selects if Input 1 amp 2 Input 3 amp 4 or Output 1 amp 2 shall be linked All settings and selections are done through the rotary encoder Changes will take effect immediately 4 1 5 MENU Buttons The left 4 MENU button will always act as an ESCAPE EXIT button The right gt MENU button offers following sub menus accessible through repeated pressing on the right MENU button e Load preset e Save preset e Access Level control e Auxiliary information Version Info Serial Number SN Version Info FW Version SW Version Info Hardware Version HW IP Address MAC Address Temperature of both amplifier stages Inside the Auxiliary information menu you can navigate through the sub menus with the encoder wheel Note that in this menu the encoder will only work in a round robin fashion regardless of the direction you turn it QX Series User Manual Premium Amplifiers NOTE The left 4 MENU button always acts as an ESCAPE EXIT button in all menus 4 1 6 Rotary Encoder with Push Button The rotary encoder allows to make swift adjustments of parameters like for example the Gain settings by simply turning it in the desired direction In some menus the push function of the encoder will act as an ENTER button for example when loading or saving presets or will allow you to access the parameter s sub settings for the Low Pass High Pass PEQ Limiter and Compressor 4 2
15. emely high frequent or extremely distorted input signal For this please switch off the amplifier for at least 4 minutes and switch the amplifier on again If the message still appears after this procedure the fault is permanent and the amplifier requires servicing QX Series User Manual Premium Amplifiers QX4500 User Manual 6 Specifications We reserve the right to make technical alterations without prior notice Output power 1 kHz THD 1 in dual channel operation typical values O 230V 50 Hz duration limited by fuse thermal protection forRL 8 Q Peak output power 1 kHz single sine wave in dual channel operation typical values 230V 50 Hz may be subjected to component tolerances Mono bridge operation output power 1 kHz THD lt 1 in mono bridge 2x600W0160 2x1100W080 2x1900W 040 2x1950W 02 70 2x1500W 020 2 x 630 W 160 2x1240W 080 2x2250W 040 2x2000W 02 7 Q 2x1500W 020 1x2200W O 160 1x3800W 080 1x3000W 040 operation typical values 230V 50 Hz duration limited by fuse thermal protection for RL lt 16 1 kHz single sine wave in mono bridge operation typical values 230V 50 Hz may be subjected to component tolerances x 2 480 W 16 peak 1 x 4500 W 80 peak 1 x 3 000 W 4 Q peak 2 x 1 800 W 70V line 1 x 2500 W 100V line 70 100V line operation output power 1 kHz THD lt 1 only possible in mono bridge operation single channel Circ
16. h the DSP Control application 3 7 POWER OUTPUTS 3 7 1 SPEAKON Connection Both SPEAKON connectors are connected to channel 1 and channel 2 outputs The pin configuration of the SPEAKON connectors is as follows SPEAKONO right View at the back Pin 1 Channel 1 signal Pin 1 Channel 1 ground Pin2 Channel 2 signal Pin 2 Channel 2 ground SPEAKONG left View at the back Pin1 Channel 2 signal Pin 1 Channel 2 ground Pin2 Channel 1 signal Pin 2 Channel 1 ground AN WARNING SPEAKON connectors marked with the lightning flash indicate high voltages that are potentially life threatening Wiring to these terminals requires installation by an instructed person or the use of ready made leads or cords QX Series User Manual Premium Amplifiers QX4500 User Manual Custom wiring should only be made by qualified personnel To prevent electric shock do not operate the amplifier with any of the conductor portion of the speaker wire exposed NOTE For reasons of safety and performance use only high quality fully insulated speaker cables of stranded copper wire Use the largest wire size that is economically and physically practical and make sure the cables are no longer than necessary NOTE When connecting speaker cabinets in parallel always use all the contacts in both SPEAKONO connectors If not this may cause permanent damage to the connectors and considerably reduce performance 3 7
17. lifiers QX4500 User Manual 2 1 FRONT PANEL LAYOUT ISE SST SS TSE 0x4500 O RINOSO NIM MIM LD a LILI VEN SO VE SOB MALI MAS go E O OZ mao R oO Gueto EO OA O OA O S N Q o_o EEE E O lt Q eo gt Daa O O O a O O O O O o 1 Signal LEDs 6 Menu buttons 2 Clip LEDs 7 Rotary encoder with push button 3 Character LCD 8 Removable air filter system 4 Channel buttons 9 Cooling air inlet vents 5 Item buttons 10 On Off switch 2 2 REAR PANEL LAYOUT O a oe BRIDGE a o o EEE E 6608 e 11 XLR line input 1 12 XLR line input 2 13 AES input 14 Ethernet network input 15 Cooling air outlet vents QX Series User Manual Premium Amplifiers 16 SPEAKONO output 2 17 SPEAKON output 1 18 Rating plate 19 AC power cable QX4500 User Manual 3 Installation 3 1 MAINS SUPPLY When mounting or connecting the amp always disconnect it from mains Only connect the QX4500 amplifier to an appropriate AC circuit and outlet according to the requirements indicated in the second line on the rating plate ER ARE RER A EA PO PARAR e 00000000 000000100000 a BON 2 RR aa RR QX4500 220 V 50 60 Hz 11 3 A 1220 W pe 1900 W 4 Ohm A O A n RR a BERR QX4500 230 V 50 60 Hz 11 3 A 1220 W pode 1900 W 4 Ohm mm O e ea
18. ltage Detection Mains over voltage detection is always operative When the mains voltage exceeds approx 263V 220 230V operation or 134V 110 120V operation the amplifier will be switched off The system will try to restart in intervals and will return with a soft start when the regular mains voltage returns 4 5 3 Mains Surge Over voltage Protection The QX4500 is fitted with a varistor unit protecting the SMPS from sporadic surge over voltages coming from the mains distribution 4 5 4 Mains Failure Detection Mains failure detection is always operative When the mains supply is interrupted for about 2 mains cycles the amplifier will be switched off When the mains voltage returns to a normal value a soft start occurs 4 5 5 Fuse Protection When driving the QX4500 at very high output levels over a longer period of time i e several seconds and minutes the average mains current draw can become very high In such situations the FuseProtect limiter will reduce the output signal in order to prevent the external mains breaker from tripping But this limiter in turn will not affect the output signal on dynamic music signal and short current peaks thus guaranteeing the full available peak output power Please note that the FuseProtect limiter only controls the average mains input current not the short term peak input current This means that with very dynamic music signals the short term input current can still reach ver
19. mance of Ch 1 gt Ch 2 amp Ch 2 gt Ch 1 0 20 4 40 60 4 dBr 80 4 100 4 120 T T T T 10 100 1k 10k 20k Hz FIGURE 7 6 DIM100 vs input level 832 dB amplifier gain Measurement of a typical performance of Ch 1 amp Ch 2 105 0 14 0 01 4 0 001 T T T T T T 1 QX Series User Manual Premium Amplifiers QX4500 User Manual FIGURE 7 7 Common mode rejection ratio vs frequency Measurement of a typical performance of Ch 1 amp Ch 2 05 107 207 30 7 dBr 40 50 60 704 80 ji T q T 10 100 1k 10k 20k Hz FIGURE 7 8 FFT of noise level no input signal applied analog input 32 dB amplifier gain Measurement of a typical performance of Ch 1 8 Ch 2 1005 10 100 1k 10k 20k QX Series User Manual Premium Amplifiers QX4500 User Manual FIGURE 7 9 Output impedance vs frequency 01 Amp RMS injected current equivalent 11 mQ 2 1 uH Measurement of a typical performance of Ch 1 amp Ch 2 300 m q 100 m5 10m 2m T T T 1 20 100 1k 10k 20k Hz FIGURE 7 10 Damping factor into 8Q equation damping factor loaded impedance amplifier output impedance Measurement of a typical performance of Ch 1 8 Ch 2 1000 800 600 5 400 5 damping factor 200 5 1 10 100 1k 10k 20k QX Series User Manual Premium Amplifiers QX4500 User Manual 8 Unit Conversion Equations an
20. n Applying analogue signal again will not wake up the amplifier again When using analogue input signal exiting the automatic standby mode must be done manually through the user interface or the DSP Control remote application So please consider this carefully before using the Auto Standby function with analogue input signal 4 4 POWER AMP PROTECTION SYSTEMS 4 4 1 Clip Limiter Under impedance Limiter The DSP section of the QX4500 offers various limiter and compressor settings both on the signal inputs and on the signal outputs Those limiters and compressors can be adjusted and even switched off completely if desired Disabling the limiters is done by setting the thresholds to their highest values But in case the amplifier is driven into hardware clip i e when the Clip LED is glowing orange or red for longer periods of time the threshold setting of the output limiter will automatically be reduced temporarily Note that this is automatically done inside the amplifier and cannot be seen in the DSP control application This automatic threshold reduction will especially take place at low output impedances smaller 4 Q and high output powers and shall prevent the amplifier from being operated in continuous hard amplifier clipping 4 4 2 SOA Protection Whenever the power transistors leave their Safe Operation Area SOA the SOA protection switches back the rail of the respective channel 4 4 3 DC Protection Each
21. ng transit If damage is found notify the transportation company and your product supplier immediately Only you the consignee may initiate a claim for shipping damage Please save the shipping carton as evidence of damage for the shipper s inspection Even if the amplifier has arrived in perfect condition save all packing materials so you will have them if you ever need to transport the unit NOTE Never ship the amplifier without the original packing materials When shipping the QX4500 amplifier always use the original shipping carton and packing materials For maximum protection repack the unit as it was originally packed at the factory Ra O ROS ROS OS RE eS oS RSS Tava dE SE SE OE St Ros Ras ROS ONO as BES PRERA A RI EREEREER O SS ME MEME SE SE OE 0H SRB KE ES SS sek SE EEE OE 0a mst PERRE SOS QX Series User Manual Premium Amplifiers QX4500 User Manual 2 The Amplifier The QX4500 is a Class H power amplifier with The QX4500 has been designed as a powerful a power output of two channel amplifier with on board 64 bit DSP processing Both amplifier settings and Power DSP settings can be user adjusted to match output Operating mode a speaker systems specifications With up to 100 on board speaker pre set storage 1x4500W mono bridge 8 O peak capability fine tuning of a system or differing systems is fast easy and straight forward sino mono PE The user interface is
22. ot indicated here SIGNAL CLIP O Oci Qx4500 O OcH2 PRESET 28 O channel O gt lt O rm O q O menu O SETTINGS 4 1 3 CHANNEL Buttons The CHANNEL buttons allow to select the channels to make adjustments on Selectable items are In 1 to In 4 and Out 1 and Out 2 depending on user and access rights Note that if channels are linked the settings will always affect both linked channels In this case the channel selection will display In 12 In 34 or Out 12 4 1 4 ITEM Buttons The ITEM buttons allow you to navigate trough all parameters which can be set from the front panel Note that not all parameters can be set from the amplifier user interface For full and easier access to all settings and parameters please use the DSP Control remote control application The available parameters are Gain Gain settings in 0 25 dB steps Smaller steps 0 01 dB can be set via the DSP Control remote application Source Selects the source of the chosen input channel Setting only available for the Inputs 1 to 4 Delay Set the signal delay QX Series User Manual Premium Amplifiers QX4500 User Manual Low Pass Configure the low pass filter section High Pass Configure the high pass filter section PEQ1to10 Configure the 10 parametric EQ bands Phase Set the Output channel phase normal or inverted Setting only available for Output 1 and 2 Limiter Configure the peak limiter Compressor Configure th
23. output of the power amp is constantly monitored for persistent DC voltage levels If the 3V thresholds are exceeded at any of the outputs the corresponding channel will be muted If DC was only detected for a short moment the amplifier will release mute and work as normal If DC is detected for longer periods or repeatedly the amplifier will switch to standby mode and disable the main power supply If this happens the display will indicate Error amp switched off In this case switch off the amplifier for at least 4 minutes and switch the amplifier on again 4 4 4 Over Current Protection Over current is permanently controlled in the output stage There are two limiting levels of over current depending on output voltage These limits will be set automatically This improves reliability without degrading sound quality when driving complex loads 4 4 5 Thermal Protection There are several sensors inside the amplifier in order to ascertain temperature data If a temperature of more than 85 C is detected at the heat sinks the input signal on that channel is reduced 4 5 MAINS PROTECTIONS 4 5 1 Inrush Current Limitation Within 2 seconds of the amplifier being switched on the inrush current limiter will increase mains current from nearly zero to nominal value This value depends on program material output level and speaker loads QX Series User Manual Premium Amplifiers QX4500 User Manual 4 5 2 Mains Over Vo
24. rt up by activating the inrush current limiter As soon as the power amplifier is connected to the mains power supply a voltage is supplied to both the line filter and the fused input of the controllable rectifier If a power cut occurs while the amplifier is switched on it will restart automatically once the power supply has been restored All amplifier settings prior to the loss of power will be maintained QX Series User Manual Premium Amplifiers QX4500 User Manual 3 3 MOUNTING Use four screws and washers when mounting the amplifier to the front rack rails For mobile use the amplifier should also be secured using the 19 mounting elements on the rear panel E E 10 50 mm al N cle E TACLANSIONNONIONSILO NONO Eg LE Qx4500 E E E RERE ol o OF S05 o O UNSINSNONSNONSNON SOS SONO SOS el LEE LEMME ME ME ZE co AER MR MEARE ass O o N E LOR ME SOR Ky SOR BEE En Wee Meant o 465 0 mm 442 00 mm y po o o El e 00001 o o o o E o o El E E E E o o al al 5 g Y fo o o o o 0 Y o o a A gt W E m 483 00 mm x QX Series User Manual Premium Amplifiers QX4500 User Manual 3 4 COOLING The air is taken in from the front and out through the back It is essential that while the amplifier is running the air
25. sions W x H x D 483 x 88 1 x 419 mm 19 x 3 5 x 16 5 inches 19 2U Net weight 9 4 kg 20 7 Ibs Shipping dimensions W x H x D 600 x 105 x 527 mm 23 3 x 4 1 x 20 7 inches Shipping weight 11 kg 24 3 lbs We reserve the right to make technical alterations without prior notice QX Series User Manual Premium Amplifiers QX4500 User Manual 7 Typical Performance Diagrams FIGURE 7 1 Gain vs frequency 120 W output power Measurement of a typical performance 20 amp 40 15 0 57 04 0 54 A4 dBr 1 54 2 57 34 3 57 4 T T T T T 10 100 1k 10k 20k 50k FIGURE 7 2 THD 1 kHz vs input level O 4 O load 32 dB amplifier gain Measurement of a typical performance of Ch 1 amp Ch 2 14 0 14 0 014 0 001 T T T T T T 1 QX Series User Manual Premium Amplifiers QX4500 User Manual FIGURE 7 3 THD 1 kHz vs input level 2 Q load 32 dB amplifier gain Measurement of a typical performance of Ch 1 amp Ch 2 15 0 14 0 01 4 0 001 T T T T T T 1 fon o 1 a o i A o O o i DS o a o o A dBu FIGURE 7 4 THD vs frequency 120 W output power Measurement of a typical performance 20 amp 49 15 0 1 0 01 5 0 001 T T T 1 20 100 1k 10k 20k QX Series User Manual Premium Amplifiers QX4500 User Manual FIGURE 7 5 Channel separation vs frequency O 120W 40 Measurement of a typical perfor
26. ual first in full so you It is also highly recommended that this that you are thoroughly aware of any risks manual is retained for future reference W ARN N G Indicates a potentially hazardous situation which if mishandled could result in serious personal injury or death QX Series User Manual Premium Amplifiers QX4500 User Manual IN General Caution e Do not expose the unit to any moisture whether rain water or other liquids Exposure to moisture could result in damage to the internal components corrosion of the steel protective grill or electrocution circuit failure Do not cut kink otherwise damage or modify the speaker cable Ensure a speaker cable with a core diameter of at least 1 5mm is used for correct performance Do not install or place speaker cables or devices near heaters high traffic areas or any area where the cables or devices can be damaged Avoid installing or mounting speaker boxes amplifiers electronics or cabling in unstable locations When flying or installing speakers only use the hardware specifically designed for this product and install to a secure wall When installing amplifiers and or other electronics only use the hardware specifically designed for this product and install to a secure wall In the event of storms and or lightning ensure all devices are disconnected from power supplies in order to prevent damage to any of the units in the system QX Series User Manual
27. uitry Bipolar Class H 2 step high efficiency circuit gt 102 dB unweighted gt 105 dB A weighted Signal to noise ratio 10 Hz 20 kHz 8 Q load Power consumption 230V both channels driven at 250 W output power Amplifier standby power off 8 W Idle Amp powered on 70 W approx of max THD limited output power 4Q 1 220 W with pink noise to represent typical music 20 1 500 W signal Maximum output voltage 142V peak in dual channel operation typical values 230V 50 Hz Maximum output current 39 A peak in dual channel operation typical values may be subjected to component tolerances QX Series User Manual Premium Amplifiers QX4500 User Manual Frequency response 4 Q load with 120 W output power THD N over frequency O 4 Q load with 120 W output power Damping factor 8 Q load 1 kHz and below Input impedance Amplifier gain Maximum analogue differential input level Level attenuation Minimum loudspeaker load impedance Lower values are safe but out of specification No performance guarantees can be given when driving lower impedances than specified Protection circuits Analogue limiters HW Cooling LED indicators Input connectors Power output connectors Modes of operation Input sources A D D A converters Latency Digital inputs 10 Hz 20 kHz 0 175 dB 20 Hz 10 kHz lt 0 02 gt 400 29 kQ balanced 32 dB default adjustable through D
28. y high levels which can be very demanding for a mains distribution If active the operation of the FuseProtect limiter can be seen by short orange or red glowing of the Signal LED s QX Series User Manual Premium Amplifiers 4 6 MAIN SMPS PROTECTIONS 4 6 1 Over Current Protection Main SMPS Switched Mode Power Supply transformer current is continuously monitored If over current occurs the main SMPS immediately stops working Should there be an internal failure this feature prevents other parts being damaged 4 7 FANS The fans mounted in the QX4500 operate permanently but as long as the temperature remains below 40 C they run at their slowest speed and can hardly be heard The highest detected temperature from either channel controls the speed of the fans above 40 C the speed is increased until it reaches its maximum value 4 8 FILTER CLEANING The air intake on the front of your QX4500 amplifier is fitted with a removable filter system If the filter becomes clogged the unit will not cool as efficiently as it should and May result in reduced output levels QX4500 Filter Assembly 1 Foam filter 2 Front frame 3 Screw AN WARNING Turn off and disconnect the amplifier from the mains before removing the front frame To clean or replace the filter just slightly unscrew the fixing screw with the help of a 3mm Allen key The screw will be held back by a small plastic spacer on the back of the frame to
Download Pdf Manuals
Related Search