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JBL SUB 12 Manual

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JBL SUB 12JBL JRX112M - 250-Watt Two-Way Passive Floor Monitor with 12"

JBL - 2 Channel

12" Two-Way Portable Stage Monitor The JRX112M is a portable, twelve-inch, two-way speaker system designed specifically for live performance stage monitoring applications. With enough sensitivity and power handling to cut through the performance volume on stage, the JRX112M has a smooth response so it can deliver maximum gain before feedback. It also includes JBL's dual-angle pole socket making it equally at home as a front-of-house speaker. Features: JBL 12" low frequency driver w... Read more

Brand: JBL
Part Numbers: JBL JRX112M, JRX112M
UPC: 050036902816
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JBL Sub 12 inch


User reviews and opinions

Comments to date: 2. Page 1 of 1. Average Rating:
rhino_harley 9:38pm on Friday, April 2nd, 2010 
clicking after 2 years I have had this for 2 years now exactly and bought if for a wonderful price in 2007.
wittekopke 11:17am on Friday, April 2nd, 2010 
JBL Venue Series SUB12 500-Watt Subwoofer This is a very high quality subwoofer and matches my other 4 JBL tower speakers in my surround sound home th...

Comments posted on are solely the views and opinions of the people posting them and do not necessarily reflect the views or opinions of us.




Venue Sub OM


9:26 AM

Page 3


SUB12 (120V)


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READ FIRST! Important Safety Precautions!


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. CAUTION: To prevent electric shock, do not use this (polarized) plug with an extension cord, receptacle or other outlet unless the blades can be fully inserted to prevent blade exposure.
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 products enclosure that may be of sufficient magnitude to constitute a risk of electric shock to persons. The exclamation point within an equilateral triangle is intended to alert the user to the presence of important operating and maintenance (servicing) instructions in the literature accompanying the appliance.
1. Read these instructions. 2. Keep these instructions. 3. Heed all warnings. 4. Follow all instructions. 5. Do not use this apparatus near water. 6. Clean only with a dry cloth. 7. Do not block any ventilation openings. Install in accordance with the manufacturers instructions. 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-type plug has two blades and a third grounding prong. The wide blade or the third prong are provided for your safety. If the provided plug does not fit into your outlet, consult an electrician for replacement of the obsolete outlet. 10. Protect the power cord from being walked on or pinched, particularly at plugs, convenience receptacles and the point where they exit from the apparatus. 11. Only use attachments/accessories specified by the manufacturer. 12. Use only with the cart, stand, tripod, bracket or table specified by the manufacturer or sold with the apparatus. When a cart is used, use caution when moving the cart/apparatus combination to avoid injury from tip-over.
13. Unplug this 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. 15. Do not use attachments not recommended by the product manufacturer, as they may cause hazards. 16. This product should be operated only from the type of power source indicated on the marking label. If you are not sure of the type of power supply to your home, consult your product dealer or local power company. For products intended to operate from battery power or other sources, refer to the operating instructions. 17. If an outside antenna or cable system is connected to the product, be sure the antenna or cable system is grounded so as to provide some protection against voltage surges and built-up static charges. Article 810 of the National Electrical Code, ANSI/ NFPA 70, provides information with regard to proper grounding of the mast and supporting structure, grounding of the lead-in wire to an antenna discharge unit, size of grounding conductors, location of antenna-discharge unit, connection to grounding electrodes, and requirements for the grounding electrode. See Figure A. 18. An outside antenna system should not be located in the vicinity of overhead power lines or other electric light or power circuits, or where it can fall into such power lines or circuits. When installing an outside antenna system, extreme care should be taken to keep from touching such power lines or circuits, as contact with them might be fatal.

19. Do not overload wall outlets, extension cords, or integral convenience receptacles, as this can result in a risk of fire or electric shock. 20. Never push objects of any kind into this product through openings, as they may touch dangerous voltage points or short-out parts, which could result in a fire or electric shock. Never spill liquid of any kind on the product. 21. The apparatus shall not be exposed to dripping or splashing, and no objects filled with liquids, such as vases, shall be placed on the apparatus. 22. Do not attempt to service this product yourself, as opening or removing covers may expose you to dangerous voltage or other hazards. Refer all servicing to qualified service personnel. 23. When replacement parts are required, be sure the service technician has used replacement parts specified by the manufacturer or that have the same characteristics as the original part. Unauthorized substitutions may result in fire, electric shock or other hazards. 24. Upon completion of any service or repairs to this product, ask the service technician to perform safety checks to determine that the product is in proper operating condition. 25. The product should be mounted to a wall or ceiling only as recommended by the manufacturer.
Figure A. Example of Antenna Grounding as per National Electrical Code ANSI/NFPA 70

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JBL SUB12 Powered Subwoofer For more than 60 years, JBL has been providing audio equipment to concert halls, recording studios and movie theaters around the world, and has become the hands-down choice of leading recording artists and sound engineers. With the JBL Venue Series, innovative technologies such as titaniumlaminate-dome tweeters, EOS waveguides and PolyPlas transducer reinforcement are available to you. Enjoy! Unpacking the Subwoofer If you suspect damage from transit, report it immediately to your dealer. Keep the shipping carton and packing materials for future use.


Since the installation of a subwoofer can be somewhat more complicated than installation of full-range speakers, it is essential that you read this section very carefully prior to connecting the subwoofer to your system. Should you have questions relating to your installation, it is advisable to call either your dealer or JBLs Customer Service Department for advice. The performance of the subwoofer is directly related to its placement in the listening room and how you align the subwoofer with its satellite speakers. Setting the volume of the subwoofer in relationship to the left and right speakers is also of critical importance because it is essential that the subwoofer integrate smoothly with the entire system. Setting the subwoofers volume level too high will result in overpowering, boomy bass. Setting the volume level too low will negate the benefits of the subwoofer. Here are several additional facts on installation that may prove useful. It is generally believed by most audio authorities that low frequencies (below 125Hz) are nondirectional and, therefore, placement of a subwoofer within any listening room is not critical. While in theory it is true that the larger wavelengths of extremely low frequencies are basically nondirectional, the fact is that, when installing a subwoofer within the limited confines of a room, reflections, standing waves and absorptions generated within the room will strongly influence the performance of any subwoofer system. As a result, specific location of the subwoofer becomes important, and we strongly recommend that you experiment with placement before choosing a final location. Placement will depend upon your room and the amount and quality of bass required (for example, whether or not your room permits placement of the subwoofer near either satellite).


Figure 1. This example shows the subwoofer positioned behind the right-channel satellite speaker to re-create the actual location of bass instruments in an orchestra and/or add impact to movie soundtracks.

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Rear Panel

Subwoofer-Level Control LFE/Normal Selector

Green: On Red: Standby

Min Max
Phase Switch Crossover Adjustment Line-Level/LFE Input


High (Speaker)-Level Inputs Power Switch Status LED

0 80Hz



For LFE use L or R


120V 60Hz

JBL Venue


NRTL/C CSA 22.2 UL1492

Page 7


If you have a Dolby Digital or DTS receiver/processor with a low-frequency-effects (LFE) or subwoofer output: If your receiver/processor does not have subwoofer outputs for the left and right channels or an LFE output, connect speaker wire from your receiver/amplifier to your speakers and subwoofer using two sets of speaker wire:



50Hz 150Hz

Set LFE/Normal switch to LFE.


If your receiver/processor does not contain a Dolby Digital or DTS processor, but has subwoofer outputs: R


This figure shows how to connect bare wires to the terminals.
Set line-level/LFE switch to Normal. NOTE: If your receiver/processor has only one sub out, you may use either the L or R input.

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Power On Plug your subwoofers AC cord into a wall outlet. Do not use the outlets on the back of the receiver. Initially set the Subwoofer-Level Control to the min position. Turn on your sub by pressing the Power Switch on the rear panel. Turn on your entire audio system and start a CD or movie soundtrack at a moderate level. Auto On/Standby With the Power Switch in the ON position, the Status LED on the back panel will remain lit in red or green to indicate the On/Standby mode of the subwoofer. RED = STANDBY (No signal detected, Amp Off) GREEN = ON (Signal detected, Amp On) The subwoofer will automatically enter the Standby mode after approximately 10 minutes when no signal is detected from your system. The subwoofer will then power ON instantly when a signal is detected. During periods of normal use, the Power Switch can be left on. You may turn off the Power Switch for extended periods of nonoperation, e.g., when you are away on vacation. Adjust Gain Turn your Subwoofer-Level Control up to the halfway position. If no sound emanates from the subwoofer, check the AC-line cord and input cables. Are the connectors on the cables making proper contact? Is the AC plug connected to a live receptacle? Has the Power Switch been pressed to the On position? Once you have confirmed that the subwoofer is active, proceed by playing a CD, record or cassette. Use a selection that has ample bass information. Set the overall volume control of the preamplifier or stereo to a comfortable level. Adjust the Subwoofer-Level Control until you obtain a pleasing blend of bass. Bass response should not overpower the room but rather be adjusted so there is a harmonious blend across the entire musical range. Many users have a tendency to set the subwoofer volume too loud, adhering to the belief that a subwoofer is there to produce lots of bass. This is not entirely true. A subwoofer is there to enhance bass, extending the response of the entire system so the bass can be felt as well as heard. However, overall balance must be maintained or the music will not sound natural. An experienced listener will set the volume of the subwoofer so its impact on bass response is always there but never obtrusive. Phase Control The Phase Switch determines whether the subwoofer speakers pistonlike action moves in and out with the main speakers, 0, or opposite the main speakers, 180. Proper phase adjustment depends on several variables such as room size, subwoofer placement and listener position. Adjust the phase switch to maximize bass output at the listening position. Crossover Adjustment The Crossover Adjustment Control determines the highest frequency at which the subwoofer reproduces sounds. If your main speakers can comfortably reproduce some low-frequency sounds, set this control to a lower frequency setting, between 50Hz and 100Hz. This will concentrate the subwoofers efforts on the ultradeep bass sounds required by todays films and music. If you are using smaller bookshelf speakers that do not extend to the lower bass frequencies, set the Crossover Adjustment control to a higher setting, between 120Hz and 150Hz. NOTE: This control will have no effect if the LFE/Normal Selector is set to LFE. If you have a Dolby Digital or DTS processor/receiver, the Low-Pass Frequency is set by the processor/receiver. Consult your owners manual to learn how to view or change this setting.


The enclosure may be cleaned using a soft cloth to remove fingerprints or to wipe off dust. The grille may be gently vacuumed. Stains may be removed with an aerosol cleaner, following its instructions. Do not use any solvents on the grille. All wiring connections should be inspected and cleaned or remade periodically. The frequency of maintenance depends on the metals involved in the connections, atmospheric conditions and other factors, but once per year is the minimum. If a problem occurs, make sure that all connections are properly made and clean. If a problem exists in one loudspeaker, reverse the connection wires to the left and right system. If the problem remains in the same speaker, then the fault is with the loudspeaker. If the problem appears in the opposite speaker, the cause is in another component or cable. In the event that your subwoofer ever needs service, contact your local JBL dealer or visit for a service center near you.

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Frequency Response 25Hz 150Hz
Amplifier RMS Power Amplifier Peak Dynamic Power Crossover Frequency
250 Watts 500 Watts 50Hz 150Hz 24dB/octave, continuously variable 12" (300mm) PolyPlas 19-3/4" x 14-3/8" x 18" (502mm x 365mm x 457mm) 39.5 lb (18kg)
Driver Dimensions (H x W x D) (with grille) Weight
The Peak Dynamic Power is measured by recording the highest center-to-peak voltage measured across the output of a resistive load equal to minimum impedance of the transducer, using a 50Hz sine wave burst, 3 cycles on, 17 cycles off.

Page 2

All features and specifications are subject to change without notice. JBL and Harman International are registered trademarks, and Venue Series, EOS, PolyPlas and Pro Sound Comes Home are trademarks, of Harman International Industries, Incorporated. Dolby and Pro Logic are registered trademarks of Dolby Laboratories. DTS is a registered trademark of DTS, Inc.


JBL Consumer Products, 250 Crossways Park Drive, Woodbury, NY 11797 USA 8500 Balboa Boulevard, Northridge, CA 91329 USA 2, route de Tours, 72500 Chteau du Loir, France 516.255.4JBL (4525) (USA only) 2006 Harman International Industries, Incorporated. All rights reserved. Part No. 406-000-05452-E



For more than 60 years, JBL has been delivering products embodying the technology developed in the professional arena equipping leading recording studios and movie theaters, as well as live-music reinforcement in venues ranging from dance clubs to Woodstock. We continue to transform this expertise into products that provide the impact and excitement of a live performance. The JBL experience is for enthusiasts who wont settle for anything less than live at home or on the go. JBL GTO subwoofers utilize a proprietary frame that delivers maximum excursion while reducing overall mounting depth of the subs, facilitating broader installation options. This frame design also ensures that the motor structure stays centered in the voice coil gap, for long-term durability and reliability. PROGRESSIVE SPIDER Each GTO subwoofer features a progressive spider, which offers better control at the excursion limits than the linear spider commonly used by our competitors. This progressive spider reduces distortion at high output levels. VENTED POLEPIECES These provide additional cooling to the motor structure, resulting in an increase in the subwoofers thermal power-handling capability. PRELOADED ENCLOSURES Three preloaded enclosures using GTO subs are offered in the Grand Touring Series. No one has as much experience as JBL engineers in designing and building subwoofer enclosures. JBL sub enclosures have traveled thousands of miles, touring with some of the worlds greatest bands, and have filled stadiums, auditoriums and local clubs with rockin bass for half a century. These car audio subwoofer enclosures are built to the same exacting standards as JBL professional audio boxes, and are designed to be rugged and sound great. GTO enclosures feature 3/4" medium-density fiberboard (MDF) construction, high-quality binding-post terminals and GTO subs. Unlike so many one-note-wonder enclosed subwoofers, GTO enclosures feature wide-bandwidth design, which provides more output between 20Hz and 40Hz, and ensures that you get all the bass youve paid for.


10" (250mm) Reduced-Depth Dual-Voice-Coil Subwoofer Polypropylene woofer cone Reduced-depth proprietary frame Vented polepiece Hi-roll butyl surround Dual 4-ohm voice coils Sensitivity: 91dB Frequency response: 25Hz 400Hz Impedance: 2 ohms/8 ohms Power handling, RMS: 250 watts Power handling, peak: 1000 watts Voice-coil diameter: 2" (51mm) Mounting depth: 4-13/16" (122mm) Cutout diameter: 9-3/16" (233mm)


12" (300mm) Reduced-Depth Dual-Voice-Coil Subwoofer Polypropylene woofer cone Reduced-depth proprietary frame Vented polepiece Hi-roll butyl surround Dual 4-ohm voice coils Sensitivity: 93dB Frequency response: 23Hz 400Hz Impedance: 2 ohms/8 ohms Power handling, RMS: 300 watts Power handling, peak: 1200 watts Voice-coil diameter: 2" (51mm) Mounting depth: 5-1/16" (129mm) Cutout diameter: 11-3/16" (284mm)


8" (200mm) Reduced-Depth Single-Voice-Coil Subwoofer Polypropylene woofer cone Reduced-depth proprietary frame Vented polepiece Hi-roll butyl surround Single 4-ohm voice coil Sensitivity: 91dB Frequency response: 30Hz 400Hz Impedance: 4 ohms Power handling, RMS: 200 watts Power handling, peak: 800 watts Voice-coil diameter: 2" (51mm) Mounting depth: 4-5/16" (110mm) Cutout diameter: 7" (179mm)


12" (300mm) Band-Pass Subwoofer Box Subwoofer type: GTO1202D Enclosure type: band-pass Power handling, RMS: 300 watts Power handling, peak: 1200 watts Sensitivity (2.83V/1m): 93dB Frequency response: 30Hz 150Hz Impedance: 4 ohms Dimensions (L x D x H): 20-1/2" x 16-5/16" x 14-9/16" (520mm x 414mm x 370mm)


Single 12" (300mm) Preloaded Vented Enclosure GTO subwoofer Power handling, RMS: 300 watts Power handling, peak: 1200 watts Sensitivity (2.83V/1m): 93dB Frequency response: 35Hz 300Hz Impedance: 4 ohms Dimensions (L x D x H): 20-1/2" x 16-5/16" x 14-9/16" (520mm x 414mm x 370mm)



12" (300mm) Dual Band-Pass Subwoofer Box Subwoofer type: 2 x GTO1202D/300mm Enclosure type: dual band-pass Power handling, RMS: 600 watts Power handling, peak: 1800 watts Sensitivity (2.83V/1m): 96dB Frequency response: 30Hz 150Hz Impedance: 2 ohms Dimensions (L x D x H): 35-7/16" x 17-3/4" x 14-9/16" (900mm x 450mm x 370mm)
Harman Consumer Group, Inc. 250 Crossways Park Drive Woodbury, NY 11797 516.255.4JBL (4525) Fax: 516.682.3556
Features, specifications and appearance are subject to change without notice. JBL and Grand Touring Series are trademarks of Harman International Industries, Incorporated, registered in the United States and/or other countries. Designed, edited and digitally produced by the Harman Consumer Group Marketing & Design Center, Woodbury, NY. 2008 Harman International Industries, Incorporated. All rights reserved. Part No. GTOSUB/ENCPI3/08


Technical specifications

Full description

12" Two-Way Portable Stage Monitor The JRX112M is a portable, twelve-inch, two-way speaker system designed specifically for live performance stage monitoring applications. With enough sensitivity and power handling to cut through the performance volume on stage, the JRX112M has a smooth response so it can deliver maximum gain before feedback. It also includes JBL's dual-angle pole socket making it equally at home as a front-of-house speaker. Features: JBL 12" low frequency driver with a 64 mm (2-1/2 in) diameter edgewound ribbon voice coil which provides more cross-sectional wire area in the voice coil gap than round wire designs, for greater efficiency and power handling. Ferro-fluid cooled compression driver with titanium diaphragm improves high frequency performance as well as system reliability. The advanced network topology crossover design shapes frequency response and delivers "coherent summation" in the crossover region. High-voltage capacitors and inductors with massive cores and heavy gauge wire enable the



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