UB4755 and UB4770
Contents
1. I1 572 BEE If using 2404 VHF option i use the JBL M553 Sway Xover d UE Xover Freq LF HF 800 Hz s ree E g HFNHF M55 Must engage 2380 EDU ee 2 Horn EQ option d ET 1 MPX1200 084770 w o Network UB4770 Active 2 way 3 way optional Configuration Xover Freq Bari EE 800 Hz Qo Qt Oo Od Hw Bo 5 Must engage 2380 MPX600 Horn EQ option Weis ou MPX1200 UB4770 Passive HF Optional VHF Network UB4770 with Network Option 1 2404H VHF Network Optional 5 MX eee X5 Xover Freq 800 Hz 5 3 65 This option can also be used for Active 2 way operation 1 10 pi includes 2380 Horn EQ 184770 with Network UB4770 wl Passive HF Optional VHF Network Option 2 UBSUB Performance Specifications LF Components 2242H 2 Sensitivity 102 dB SPL Power Handling 1600 W LF Max Peak SPL 140 dB Frequency Response 30 200 Hz C2. 528 f using 2404H VHF option wee Xover Freq use the JBL M553 3 way Xover UN ce T XX LFHF 800 1200 Hz OD j HF VHF M55 Must engage 2380 see Horn EQ option g ry aS 084755 w o Network MPX1200 ee UB4755 Active 2 way 3 way optional Configuration Xover Freq NEM o EE WO 800 1200 Hz 90 guo O98 ouo 0 0 lt M552 Must engage 2380 MPX600 Horn EQ option gt WX MPX1200 UB4755 with Network 2404H VHF Network Optional UB4755 wl Passive HF Optional VHF Network Option 1 MPK BOO eee E Bt rx Xover Freq 800 or 1200 Hz MPX600 5 Direct from Mixer fone 2225 This option can also he used for Active 2 way operation 10 iius Nn UB4755 with Network includes 2380 Horn EQ Xover card installed 2404H VHF Network Optional UB4755 wl Passive HF Optional VHF Network Option 2 UB4770 Performance Specifications LF Components 2226H 2 HF Components 2446 w 2380A Sensitivity 100 dB SPL Power Handling 1200 W LF 150 W HF Max Peak SPL 137 dB Frequency Response 40 18k Hz
3. jeuoissajold doysig Aq c eH gnsan ail E e N e E i o a _ rr d 5 2 Gs oos Uf 2 TE gt N N Q gt em N M Eo lt gt 58 2 E P EI 1 N t 60 6 pork aa 55929 I 2 gt Q lt lt 255 gt occ Y SLED gt Do TAI o lt I 090 0 61 84 t6 aeos 0 05 N T T 5 N N 0599 NI N Ht 10 PT pone N m m o N Q N x lt gt N lt f N zu N N N S LIHVI 0 L0 N ee N 2 S I S 0 0 1 Ava vus La 66 TIT 86 0 s e gt v 03 Xover Freq Subsonic Filter 30 Hz VLF LF 80 150 Hz Xover Freq Subsonic Filter 30 Hz 80 150 Hz Xover Freq Subsonic Filter 30 Hz 80 150 Hz Outputs to Full Range System e g HANNEL At sh 4 m E E E we Xm HED
4. ui painseaw 18 0155 9 014 ji 1 1uBi s suoisueuip doysig T q uMEAq SsjuauiaJnseaui 211 8ui uo paseq c A98 02268 AHL se UMOYS suoisueulig 8 0N a 6 n Lower Internal Support 15 00 16 264 0 044 20 043067 Duct Tubes 351 1343 Compression Driver Support s Ay 1500 Top Divider 0 1800 55 46 10 o 152 0 5 15 16 a 9618 02b 04 00 443 0 6 448 GLO 6416 9 S 12 0 095 sio oto 985 9 5 0 3 8 95 03 969 099 a aAa ANNS one ore 0 Ur 0 6 Ta 2 Aveo 12006 58 Sus oos lt gt 16 N ej Vt 09 N E N AR 2 N rN t S e E s 5 m N gt N jl zh SN uss N ra 06 oei Gri ov LN 0 6 09271 9 0 66 275
5. M553 Mono Mode UB4755 Passive Option 2 or UB4770 Passive Option 2 MPX1200 Bridged mode Subwoofer Add on Option 1 Outputs to 2 way Full Range System e g um amp d Cr 1 M ved OP D Y dO US XD xe e UB4755 Passive Option 1 or UB4770 Passive Option 1 MPX1200 Bridged mode Subwoofer Add on Option 2 Outputs to 3 way Full Range System UB4755 Active w Optional VHF or UB4770 Active w Optional VHF 00 iz SSS Bt MPX1200 Bridged mode Subwoofer Add on Option 3 UBSub Q Q UBSub Q Q UBSub
6. 1 4 98 04 794 0 31 118 95 0 36 9 5 0 3 8 16 0 0 5 8 Tat Top rt O 19 6 1846 7 50 0 415 46 19 0 01376 135 0 5 546 189 0 7 746 cmo E 85038 gt T 65146 135 0 55 6 363 5 14516 S JU 106940 L 800 118 es Top amp Bottom Internal Support 9 5 0 38 06 0 331 Wii 1595644 0 114 0 438 a 2285 pH F zzzzl R 141 590 4750 6718 Optional Cutouts for VHF 3 5 038 35 0 38 Sides m TT 400 5 Baffle 42 0 94 456 15089 300 12518 9 5 0 3 8 166 5 6 946 35 1256 E 19 0 0 9 5 0 318 T 160 0 6 546 Compresion Driver Support IR 160 0 646 cn c Cc 5 Note Duct Tubes 75 Dimensions shown as mm inches OD 06 All dimensions are based on metric measurements ES Some dimensions may need slight adjustment if gt measured in inches o gt KAS
7. PROFESSIONAL U Build Enclosure Guide Horizontal Format Vertical Format Dual 18 Dual 12 Compression Driver Dual 15 Compression Driver Add on Subwoofer system System System Specifications Specifications Specifications Guidelines Guidelines Guidelines Construction Drawings Construction Drawings Construction Drawings Network Schematic Network Schematic Components and Components and Components and Connections Connections Connections Connector Panel Layout Setting up Your System JBL Professional Enclosure Guide 1 Introduction JBL components are known worldwide as the best money can buy This guide contains construction details filter network schematics and connection diagrams for enclosure designs using some of the most popular of those components the 2206H 2226H 2242H 2447J and 2404H These enclosures are based on popular JBL systems but have been modified for ease of construction for the intermediate level woodworker By following the instructions herein you can build your own system to perform as well some of JBL s best designs 1 1 Cabinet construction Material should be 19 mm 13 ply void free plywood for general purpose portable applications or high grade MDF board for less portable applications Ducts can be made of PVC pipe or hard cardboard tubes such as those found in carpet rolls Joints should be glued and screwed Care should be taken to ensure tight joinery in order to make the enclosure airt
8. 2x2206H J RED RED HF 40uf 250V 2446J RED 2 2404 BLK ji optional 2 3 way 12 15 passive SPEAKON NL8MP Input to 2 2 All others loop through O BLK LF 2x2206H UO RED 120 20W 2446J BLK 7 1 5uf 250V BLK 12404H 6 mH om optional O RED 1 5uf 250V JL me 12404H ji optional Figure1 Network Schematics 45 00 4 0 0 3 16 45 00 9 4 0 0 3 46 03A 141 Bolt Circle Bolt Circle 041 158 941 587 160 0 6 5 16 160 0 6 5 16 Note ed Dimension are shown as mm inches All dimensions based on metric measurements Inches are shown for reference only 50 0 4 15 16 50 0 4 15 16 C _ A 40 0 1 946 40 0 1 916 800 3 1 8 800 418 Connector Panel Connector Panel 0 Pin Neutrik Speakon 4 Pin Neutrik Speakon Use Part NLOMPR Use Part No NLAMPR Figure2 Suggested Connector Panel Layouts UB4755 Performance Specifications LF Components 2206H 2 HF Components 2446 w 2380A Sensitivity 198 dB SPL Power Handling 1200 W LF 150 W HF Max Peak SPL 135 dB Frequency Response 55 18k Hz Cy k n 832 0 21316
9. the MPX1200 in bridge mode also means it has more input gain so you should turn the subwoofer output down to compensate The amplifier should be driven clean that is without clipping At the most clip lights should just turn on during occasional programme peaks 3 3 Crossover The subwoofer system does not have a passive crossover and NEEDS AN ACTIVE crossover Do not wire it in parallel with a full range system as this only rob power from both resulting in poor sound quality JBL cross over models M552 or M553 should be used The table below details what x over model how many units will be needed for a stereo system and what crossover frequencies should be used Note that you should assign 2380 series horn EQ to the 2446J MF compression driver Make sure that a itis set for 2380 equalization b It is assigned to the outputs that will drive the compression driver The manual for the M552 or M553 contains specific information on how to perform make the settings Table 7 Optimum Crossover Frequencies and Equipment Options mode UBSUB subwoofer 2 way active M552 stereo 2 80 150 Hz ae mee passive version UBSUB subwoofer 2 way active M552 stereo 2 80 150 Hz UB4755 4770 with way mode tweeters in passive version UBSUB subwoofer 3 way active M553 stereo 3 80 150 Hz 1200 Hz engage UB4755 4770 in way mode 2380 EQ for MF active version UBSUB subwoofer 4 way active M553 mono 4 80 150
10. 52 or M553 should be used The table below details what x over model how many units will be needed for a stereo system and what crossover frequencies should be used Note that you should assign 2380 series horn EQ to the 2446J MF compression driver Make sure that a It is set for 2380 equalization b It is assigned to the outputs that will drive the compression driver The manual for the M552 or M553 contains specific information on how to make the proper settings An alternative to using an external crossover in two way active mode with the UB4755 or UB4770 is to use an IM 10 input crossover module and an MPA1100 amplifier for the low frequencies instead of an M552 and an MPX1200 amplifier This will provide a more compact system that cannot be modified externally and therefore provides protection against unauthorized alteration Horn equalization for the 2380 series of horns is also provided in the module and should be engaged Table 4 Optimum Crossover Frequencies and Equipment Options X over model X over mode stereo frequencies with driver 2 way mode engage 2380 EQ UB4770 for MF UB4755 Dual 12 15 2 way active IM 10 input 1200 Hz or with driver module for engage 2380 EQ UB4770 MPA1100 for MF amplifier 0 4755 Dual 12 15 3 way active M553 stereo 1 1200 Hz 7k Hz Or with driver and 3 way mode engage 2380 EQ UB4770 tweeters for MF Note that you will need to balance the output for each of the freq
11. Hz 1200 Hz 7k Hz UB4755 4770 with way mode engage 2380 EQ for MF tweeters in active 2 units needed version Note that you will need to balance the output for each of the frequency bands in relation to the others If your system allows it is always good practice to introduce a high pass filter sometimes referred as a subsonic filter beyond the lowest frequency of operation This will improve power handling by avoiding excessive cone excursion and will maximize system headroom For a 4755 or 4770 use a high pass filter at 40 Hz When using a 4755 or 4770 in conjunction with the UBSUB subwoofer cut the subwoofer signal at 30 Hz On the MPX series of amplifiers you can accomplish this by engaging the 30 Hz filter on the front of the amplifier Additionally you may want to replace the M553 or M552 for the JBL DSC260 3 way stereo 6 way mono digital system controller that will provide programmable cross over EQ limiting and time alignment or delay 4 Setting Up Before setting up the system interconnection cables should be assembled It is essential that all cabling use the proper type and size of wire and that termination is done correctly This will give the best performance from the system by eliminating losses from poor or incorrect connection 4 1 Polarity One of the most important considerations in cables is that they are in correct polarity In polarity refers to all signals moving in the same direction at the same tim
12. e Having cables improperly connected out of polarity can cause cancellations at certain frequencies thereby adversely affecting frequency response especially at low frequencies This translates simply into making certain the and connections are consistent throughout the system JBL speaker systems exhibit outward positive cone motion when a positive voltage is presented to the terminal JBL electronics follow the Pin 2 Hot convention for wiring of XLR connectors 4 1 Speaker Cable Use the correct thickness for the impedance you will be driving and length of cable you will be running Longer runs require thicker cable Lower impedances also require thicker cables The table below gives the maximum length of cable to be used for a given speaker load For the best performance from your system these tables should be referenced for your choice of speaker cable Table8 Maximum Cable Length m for Gauge of Wire and Speaker Impedance 4 2 Taking it further For optimal fine tuning of your system we suggest the JBL SMAART PRO Software SMAART PRO is a full function FFT Fast Fourier Transform measurement tool which allows the user to readily see where frequency response may need adjusting The software can be used during a performance and only requires a PC microphone and mixer 2 3 way 12 15 active SPEAKON NL8MP VHF to 4 4 HF to 3 3 LF to 2 2 1 1 loops through for subwoofer gt BLK LF
13. ight Handles and connector plates must be made airtight Silicone cement can be used here and in corners to seal the enclosure Interior of box should be lined with damping material such as fiberglass insulation to reduce internal standing waves Be sure to keep port openings free of material as blockage will decrease their effectiveness Drivers are mounted on the front of the baffle using screws and T nuts in the baffle This allows easy access to interior to adjust damping and easy driver replacement 1 2 Construction Tips Everything is built around the baffle The baffle rests in dado groove in each of the two sides and top and bottom panels Install T nuts for Drivers and Horns prior to assembly The Top and bottoms panels fit OVER the side panels Install the back panel LAST This will allow access to the interior for placement of damping material Dry fit all parts before final construction 2 The full range systems UB4755 and UB4770 2 0 Introduction The UB4755 and UBA4770 are 2 way 12 or 15 woofer and HF compression driver designs with the option of adding two super tweeters for 3 way systems The 12 version is a horizontal format for low profile single unit use and the 15 is an arrayable trapezoidal design for use where multiple units are to used together to form a larger system The components used are as follows Table 1 Components used for UB4755 and UB4770 Name Description Configurati
14. on VHF _ UB4755 2 2 2206H 2446J 2380A Dual 12 with driver UB4755 3 way 2 2206H 2446J 2380 2 2404H Dual 12 with driver and tweeters Dual 15 with driver UB4770 3 way 2226H 2446J 2380A 2404H ET Pr and tweeters 2 1 Connection Two 8 pin Neutrik Speakon connectors are specified so that you may loop through to another cabinet note that that will get you a 2 ohm load or a subwoofer DO NOT CONNECT MORE THAN TWO CABINETS IN PARALLEL Do not use series wiring Table 2 Connector Pin Assignments Active Use VHF 2x2404H Super tweeters optional 1 1 not used or loop through not used or loop through for subwoofer for subwoofer 2 2 Amplifiers The following amplifiers should be used Table 3 Amplifiers for each Passband tive _________ Pin s Amplifier Amplifier PAmpliigr 4 4 unused JBL MPA275 275W per channel at 4 ohms EB LC ohms 4 ohms 4 ohms unused unused The amplifiers should be driven clean that is without clipping At the most clip lights should just turn on during occasional programme peaks Note In two way active mode you may use an MPA1100 amplifier for the low frequency and make use of the IM 10 input crossover module See the crossover section below 2 3 Crossover For the passive version a passive crossover is built in For the active versions a JBL M5
15. uency bands in relation to the others 3 The Subwoofer system UBSUB 3 0 Introduction The UBSUB 1 dual 18 system that utilizes the highest output 18 cone bass transducer currently available from any manufacturer the 2242H The 2242H is designed for smaller enclosures and to provide a more punchy or faster low frequency response required for live sound and dance club PA applications 3 1 Connection Two 8 pin Neutrik Speakon connectors are specified so that you may loop through to full range cabinets or another subwoofers note that that will get you a 2 ohm load DO NOT CONNECT MORE THAN ONE CABINET TO THE AMPLIFIER Do not use series wiring Table 5 Connector Pin Assigments for UBSUB 00 0000000 0 0 not used or loop through for full range cabinets not used or loop through for full range cabinets not used or loop through for full range cabinets Subwoofer 2x2242H Note 4 pin Neutrik Speakon connectors can also be used provided that you will be using the full range systems in passive mode In that case keep the pin number the same 2 2 and use 1 1 for looping through to the subwoofer if you have it 3 2 Amplifiers The following amplifiers should be used Table6 Amplifiers for UBSUB Active 0 __ _ _ Amplifier JBL MPX1200 2400W in bridge mode at 4 ohms Note that the amplifier is used in bridge mode so that only one dual 18 cabinet maybe connected to one amplifier Using
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