SerieT Sub-Bass Systems
Contents
1. Type Active Drive Unit Passive Radiator Lower Frequency Response Input Connectors Input Impedance Gain Control Range Power Output Phase Switch Amplifier Type Protection System Fully Electronic SET SAFE D C Fault Output Short Mains Input Voltage Fuses Dimensions WHD Net Weight Finish Supplied Accessories Mains Lead Neutrik Speakon Interconnect Users Manual Passive Radiator front firing passive radiator down firing active woofer 10in 254 mm long throw steel chassis 10in 254 mm 28 Hz at 6 dBin room Hi Level Neutrik Speakon Lo Level single phono LFE phono High Level 150k Low Level 10k 1 LFE 10k ohms 80 dB 300 Watts RMS Yes 0 or 180 degrees Class AB Yes Yes Yes 220 240 volts 110 120 volts for certain markets 3 15 Amp semi delay 230 volts operation 6 3 Amp semi delay 115 volts operation 13 x 14 75 x 14 75 in 330 x 374 6 x 374 6 mm Including Feet and Rear Panel Controls 39 Ibs 17 7 kg Gloss Piano Black or White Lacquer Yes Yes 10 Meters Nominal Yes 17 T 7 Type Active Drive Unit Passive Radiator Lower Frequency Response Input Connectors Input Impedance Gain Control Range Power Output Phase Switch Amplifier Type Protection System Fully Electronic SET SAFE D C Fault Output Short Mains Input Voltage Fuses Dimensions WHD Net Weight Finish Supplied Accessories Mains Lead Neutrik Spe2. a home cinema system The 1 Input reproduces the 1 LFE channel and the HIGH LEVEL connection underpins the main front speakers The main front speakers should be set to the large option on the processor See Home Cinema Applications for more information Connecting to the Power Amplifier Using the Speakon HIGH LEVEL INPUT To engage the Neutrik Speakon plug insert fully into socket and rotate clockwise until locked To remove the Neutrik Speakon plug grip body of plug place thumb on chrome lever move lever backwards rotate plug anticlockwise quarter turn and withdraw The HIGH LEVEL input is designed to accept the stereo two channel signals from the speaker terminals of your receiver integrated amplifier or basic amplifier This has the advantage of ensuring that your subwoofer receives exactly the same signal as the main speakers which means that the character of the bass from the 6 main system is carried forward into the Sub Bass System This is a very important point and together with REL s Natural RollOff circuitry ensures far superior system integration of the Sub Bass System with the main system HIGH LEVEL INPUT Connections should be made to the same binding post on main amplifier as the main speakers Red to amplifier main right speaker red terminal yellow to amplifier main left speaker red terminal and black to amplifier main speaker black terminal right or left but not both Plug the Neutrik Speakon plug
3. center channel First carefully set up and dial in the primary REL then move to the rear REL and balance this against the main REL Care must be taken to ensure phase is identical on both RELs as accidentally reversing phase of one relative to the other will result in a dramatic reduction in bass output Finally carefully dial in the performance of the center channel sub Hint To make this easier once the primary REL has been dialed in unplug it using the Speakon connection from the system and dial in the rear followed by the center channel REL Genuine sticklers for perfection find it easiest to tune in sections For example connect ONLY the L R mains and the primary REL Next tune ONLY the rear surrounds and the rear REL Finally listen to and tune ONLY the center channel with the center REL 14 When you have accomplished this task plug all three units in and re check your gain settings as the cumulative effect of hooking all three up will usually result in temporarily excessive output Work carefully and methodically to reduce the settings on primary then rear and finally center channel RELs and in a few minutes balance should be restored However the net result of all your tuning will be a sound that utterly immerses the theater owner in a rich natural wash of bass that suffuses the room effortlessly rather than what is often experienced as too loud a bass balance pushing uncomfortably at the listener Running In Care taken
4. one of the unique secrets of REL s success By connecting to the high level input on the REL from the amplifier you build forward the sonic signature of your main system including the tonal balance and timing cues of the entire electronics chain In this way the REL is fed the exact signal that is fed to the main speakers 2 When possible the REL should be placed in one of the corners behind the speakers Remember we are dealing with true LOW bass pressurization with RELs Low bass pressurization below 40Hz is best derived from corner placement where the most linear and efficient low bass can be produced Connecting and Setting Up HIGH LEVEL connection using the enclosed cable with the Neutrik Speakon connector is always the first choice This connection can be made without affecting the performance of the amplifier because the REL s amplifier input impedance is 150 000 ohms in effect not producing any additional demand whatsoever on the rest of your system e The standard HIGH LEVEL hook up procedure is attach the red wire to the amplifier s right positive speaker output terminal attach the yellow wire to the amplifier s left positive speaker output terminal attach the black wire to whichever of the amplifier s ground output terminals is convenient plug the Speakon connector into the Sub Bass System s HIGH LEVEL input HIGH LEVEL Input Release Lever Amplifier Main Speaker Outputs e For differential i e fully bal
5. 1 6 Amp semi delay 230 volts operation 3 15 Amp semi delay 115 volts operation 10 5 x 11 75 x 11 75 in 266 7 x 298 4 x 298 4 mm Including Feet and Rear Panel Controls 26 Ibs 11 7 kg Gloss Piano Black or White Lacquer Yes Yes 10 Meters Nominal Yes In the interest of product improvement REL Acoustics Limited reserves the right to alter these specifications without notice 19 REL Acoustics Limited North Road Bridgend industrial Estate Bridgend CF31 3TP United Kingdom Telephone 44 0 1 656 768 777 Fax 44 0 1 656 766 093 Web www rel net
6. Important Safeguards Read all of these instructions Save these instructions for future use Unplug from the wall socket before cleaning Do not use near water Do not place on a stand or table it may fall causing injury to a child or adult and damage to the unit The unit should only be operated from the power source indicated on the panel of the amplifier Only use the power cord supplied Do not allow anything to rest on the power cord Position the power cord such that it cannot be walked on For added protection during a lightning storm or when not in use for long periods of time unplug it from the wall socket 10 Never spill any kind of liquid on the unit 11 Do not attempt to service the unit yourself as removing the amplifier may expose you to dangerous voltages Refer all servicing to your dealer 12 Unplug the unit from the wall socket and refer servicing to your dealer under the following conditions a When the power cord or plug is damaged b If liquid has been spilled onto the unit c If the unit does not operate properly by following the operating instructions d If the unit has been dropped and damaged e When the unit exhibits a drastic change in performance O CON DUM BPWN PR Warning This item is heavy To avoid risk of injury take care when handling Design Safety This apparatus is supplied with a detachable mains cord For 230V operation a 1 6A T5 2A T7 3 15A T9 fuse is fitted in the socket For 115
7. V operation a 3 15A T5 4A T7 6 3A T9 fuse is fitted Should the fuse need to be replaced use a similar rated fuse approved to ASTA or BSI 362 standards Do not use without the fuse cover in place Replacement fuse covers are available from your distributor Welcome to the REL Family Thank you for buying a REL Serie T Sub Bass System The Serie T is the result of a state of the art collaboration between our American design and engineering team and our British production team Serie T is conceived as the most cost effective high end product we know how to build We have spared none of the materials and finishing techniques our larger designs are noted for Many competing products are clearly the result of cost engineering however Serie T is a pure high end product in design and execution If like many you are surprised and delighted by the quality and suddenness of bass as rendered by Serie T know that this is the result of a careful painstaking iterative process of the sort that so rarely makes it into production at anything like these prices Many of the sonic virtues speed warmth and slam embodied in Serie T are the direct result of mechanical and acoustic advancements In particular we have utilized damping and resonance control approaches more familiar to fine acoustic instrument manufacturers incorporating bracing that is highly unusual in this application The bracing is carefully wedged into shallow channels in the side a
8. akon Interconnect Users Manual Passive Radiator front firing passive radiator down firing active woofer 8in 200 mm long throw steel chassis 10in 254 mm 30 Hz at 6 dBin room Hi Level Neutrik Speakon Lo Level single phono LFE phono High Level 150k Low Level 10k 1 LFE 10k ohms 80 dB 200 Watts RMS Yes 0 or 180 degrees Class AB Yes Yes Yes 220 240 volts 110 120 volts for certain markets 2 Amp semi delay 230 volts operation 4 Amp semi delay 115 volts operation 12 x 13 75 x 13 75 in 305 x 349 2 x 349 2 mm Including Feet and Rear Panel Controls 230V 31 Ibs 14 1 kg 115V 34 Ibs 15 4 kg Gloss Piano Black or White Lacquer Yes Yes 10 Meters Nominal Yes 18 T 5 Type Active Drive Unit Lower Frequency Response Input Connectors Input Impedance Gain Control Range Power Output Phase Switch Amplifier Type Protection System Fully Electronic SET SAFE D C Fault Output Short Mains Input Voltage Fuses Dimensions WHD Net Weight Finish Supplied Accessories Mains Lead Neutrik Speakon Interconnect Users Manual Closed Box down firing active woofer 8in 200 mm long throw steel chassis 32 Hz at 6 dB in room Hi Level Neutrik Speakon Lo Level single phono LFE phono High Level 150k Low Level 10k 1 LFE 10k ohms 80 dB 125 Watts RMS Yes 0 or 180 degrees Class AB Yes Yes Yes 220 240 volts 110 120 volts for certain markets
9. anced amplifiers using one REL simply use the standard connecting scheme with the exception of connecting the black wire to chassis ground i e a metal bolt or screw preferably not painted or anodized on the chassis of the power amp or receiver not to a negative speaker terminal and then connecting into the HIGH LEVEL input on the REL Please contact your dealer should there be any questions concerning this or any other hookup procedure Supplied Neutrik Speakon HIGH LEVEL Interconnect Black Red En Chassis Screw O OO L R Amplifier Main Speaker Outputs NOTE The Serie T models are equipped with internal circuitry to allow seamless connection to Class D digital main amplifiers If connecting to a Class D amplifier follow the above connection procedure for differential amplifiers e If connecting two RELs in a stereo configuration connect the black wire of each REL to the negative speaker terminal of the corresponding amplifier channel twist together the red and yellow wires of each REL separately and connect each pair to the positive speaker terminal of the corresponding amplifier channel Supplied Neutrik Speakon HIGH LEVEL Interconnect Supplied Neutrik Speakon HIGH LEVEL Interconnect Left Sub Right Sub Amplifier Main Speaker Outputs e If connecting a single REL as a dedicated center channel sub connect the black wire of the REL to the negative center channel speaker terminal twist together the red and yellow
10. cessor to the large or full range setting for the left and right speakers in order for the REL to receive the bass signal via the high level cable In this configuration the REL provides support for both the left and right speakers for two channel listening and support for the LFE when movies are playing Most processors will allow you to defeat the subwoofer output when listening in the two channel mode The effect of this set up is one of greatly increased dynamics in the mid bass range no bass bloat and a greater degree of space and timing from the special audio effects REL Theater Reference 3D Bass While slightly more complicated than the basic REL Theater Reference scheme use of three RELs produces a number of noteworthy benefits and proves the most cost effective method of achieving professional Dolby 5 1 standard bass performance REL Theater Reference 3D Bass produces true full range performance from the three primary zones of reproduction in theater sound resulting in a far more natural and immersive experience than ANY single sub can produce 1 The main L R speakers should be connected to the primary REL using REL Theater Reference connection This unit forms the foundation of your theater system s performance and so should be perfectly matched to one s main speakers 2 In the rear corner ideally that which is opposite the primary sub connect a second REL to the rear speakers using REL Theater Reference connecti
11. e extended in the lower frequencies for true full range reproduction All of our designs are true Sub Bass Systems meaning they are designed to reproduce very low frequencies below 30 Hz that are felt rather than heard This is because we understand that music is full range as are sound effects on movies and we intend for our products to reproduce all of these sounds not just a narrow band Serie T is equipped to allow you to take full advantage of Dolby Digital AC3 DTS MPEG 2 and any other digital sound format that includes a dedicated Low Frequency Effects LFE channel The dedicated LFE input meets the tough specification laid down for digital 3 2 1 channels usually known as 5 1 The output is nominally flat from 35 Hz 90 Hz It has a dedicated input level control which enables users to set the LFE level independently of the processor This is important because not all processors offer control over this significant parameter The LFE channel is frequently output at 10 dB higher levels than the other channels The Serie T models also have high level speaker level inputs with dedicated input level control Uniquely both the speaker level and the LFE input can be used simultaneously This means you may set it up for the best possible 2 channel performance sound with your CDs or other stereo signals and instantly revert to using the Sub Bass System as the dedicated LFE component when watching movies This is a feature of real benefit if y
12. ime with a resultant failure rate that is the envy of the industry The drivers are simple rugged relatively light and yet offer excellent self damping so we are better able to reproduce the nuance of music and preserve the explosiveness of transients Finally the cabinets apart from being physically beautiful are like finely tuned instruments that are largely responsible for the sonic virtue with which Serie T is imbued 15 Power Saving Efficiency All REL Sub Bass Systems are designed for maximum power efficiency both when passing a signal through to its resultant output sound into the room and also when silent REL circuitry allows for power starvation operation under no signal conditions This means that when there is a gap in the signal the REL is instantly at maximum power saving efficiency yet remains at maximum readiness to respond immediately to a sudden transient signal such as an explosion in a movie even after a long quiet period and regardless of level It is not necessary to switch your Serie T off between listening sessions it will not significantly shorten its life by leaving it switched on On the other hand it will not harm sound quality if it is always switched off It is perfectly safe to leave your Serie T on under all normal domestic circumstances as it is fully protected by internal fuses and an external mains fuse in the fuse holder of the mains input socket There is a spare inside this holder 16 T 9
13. into the HIGH LEVEL Speakon socket Note This connection does not draw power from the power amplifier and yes your REL is a powered sub bass system However by deriving its signal from the main power amplifier better sound quality is achieved 1 INPUT This requires a phono to phono cable and is a dedicated true 1 channel This circuit therefore eliminates the normal Natural RollOff Crossover and passes the 1 LOW LEVEL signal through with only the required 120Hz fourth order filter LOW LEVEL INPUT This single channel phono input allows for conventional connection to a preamplifier and should be used in the rare event that a HIGH LEVEL connection proves incompatible Plug one end of a single phono phono cable into the LOW LEVEL input jack of the REL and the other end into either the left or right channel output of your preamplifier Because much sub 35Hz bass information is mono there is little need to connect both left and right channels Should your system require this style of connection HIGH LEVEL is preferred additional performance is available by purchasing a second matching REL and running each as separate stereo subs PHASE SWITCH Used to set phase Position O HIGH LEVEL LOW LEVEL or LFE 0 degrees phase Position 180 HIGH LEVEL LOW LEVEL or LFE 180 degrees phase PHASE SELECTION AFFECTS BOTH HIGH AND LOW LEVEL INPUTS Crossover is always engaged for HIGH LEVEL INPUT The 1 LFE signal does not pass through the cro
14. itch Use to turn unit on or off 9 IEC Mains Socket Fused mains AC input socket that accepts a detachable power cord Connecting Up Always switch off your system before disconnecting any wires ALWAYS connect using the REL HIGH LEVEL input unless your system simply cannot accommodate this While rare a few esoteric systems such as those that deliver a pure digital signal to active speakers preclude this possibility To increase the versatility of connecting up the Serie T models have three separate inputs A Neutrik Speakon socket and two phono sockets This is to facilitate use with both two channel stereo systems and AV surround sound systems The HIGH LEVEL unbalanced dual channel stereo input is via a Neutrik Speakon connector which is connected to the power amplifier s left and right channel speaker terminals This has the advantage of ensuring that the REL receives exactly the same signal as the main speakers This means that the character of the bass from the main system is carried forward into the sub bass This is a very important point and together with the REL s Active Bass Controller ABC ensures far superior system integration of the sub bass with the main system The LOW LEVEL input is via a phono jack that connects to either the 1 LFE output of ahome cinema amplifier processor or to the output of a stereo preamplifier HIGH LEVEL and 1 LFE inputs can be used simultaneously The benefits are two fold when used with
15. le balance i e the point at which you can hear the REL even with the main speakers playing Now bring the crossover point up until it is obviously too high at this point bring it down to the appropriate lower setting For all intents and purposes this is the correct crossover point Once this stage has been reached subtle changes to volume and crossover can be accomplished to provide the last bit of complete and seamless integration With that set up is complete 12 Hint There may be a tendency to set the crossover point too high and the volume of the Sub Bass System too low when first learning how to integrate a REL with the system the fear being one of overwhelming the main speakers with bass But in doing so the resulting set up will be lacking in bass depth and dynamics The proper crossover point and volume setting will increase overall dynamics allow for extended bass frequencies and improve soundstage properties Note volume must be adjusted in conjunction with crossover changes In general when selecting a lower crossover point more volume may need to be applied REL Theater Reference Home Cinema Applications For Dolby Digital AC3 or other 5 1 theater systems once the standard set up for two channel outlined above is complete the LFE output from the processor or receiver should be connected to the 1 LFE input and appropriate volume adjustments made using the 1 LFE LEVEL control For this configuration you must set the pro
16. lity to tune the REL to the longest distance in the room in order to produce the longest therefore lowest bass waves The Process To begin the set up process choose a piece of music that has a repetitive bass line that is very low in frequency We suggest track four from the soundtrack to Sneakers Columbia CK 53146 This has a repetitive bass drum throughout that gives you plenty of time to move the woofer around but more importantly the venue was quite large for this recording and therefore it has a very deep and large scale bass signature This type of track is perfect for the set up process and should be played at the highest reasonable level expected for system playback 11 Working with a partner one in the listening position and one at the REL manipulating the controls is the most effective and efficient way to set up the REL If working alone the initial steps in the set up can be very effectively carried out from the location of the REL Trying to ignore all other music in the track listen for the bass drum and its effect on the listening room Phase Orientation Once in the corner phase can be adjusted This may be the single most critical step and because it really is quite simple it is often over thought Keep in mind the right phase is whichever position is the loudest or fullest While playing music with true low bass adjust the crossover to a point where the REL and the speaker are sure to share frequencies about halfway
17. nd top wall material which better couples the energy control of these panels Additionally the aluminium feet are milled from solid billet and weigh an incredible amount We thoroughly tested and were able to clearly discern the benefit of having a solid high mass exit path for deleterious vibration vibration that would otherwise slow and blur the clarity of bass lines Make a structure inert and quieter and more of the music emerges A brief word about the styling fit and finish Each Serie T receives nine coats of lacquer all of which require hand sanding The final coat is then turned by hand on a large industrial rouging wheel using jewelry buffing compound Finally the deep wet gloss is achieved by hand polishing using micro fibre cloth and expensive aftermarket waxes All exposed bolts used to attach the rear panel to the Serie T cabinet are polished T 304 stainless steel allen head designs This extra cost is undergone to ensure that even in humid markets RELs will not oxidize or degrade in appearance Each badge is milled from solid billet aluminium and is a full 2 5mm thick even though we choose to only reveal 1mm above the surface of the cabinet Much like the underlying quality of all RELs more lies beneath the surface than is evident to the eye Serie T Sub Bass Systems Many or most loudspeakers emphasize the mid bass This is the range from 50 to 90 Hz We at REL believe this is an incomplete approach and that loudspeakers need to b
18. ou wish to play music in stereo mode in the purist audiophile way and also in REL Theater Reference mode with no switching necessary By connecting BOTH High Level and 1 concurrently and setting your processor to Large or Full Range the best possible performance will be obtained Consult the owner s manual of your loudspeakers or consult with your dealer before setting to large as a few speakers cannot handle the bass that is then directed through to the main speakers REL Serie T Rear Panel Connection Legend 9 Sel GERIET le TTT TI 1 Volume Control for 1 LFE INPUT Use to adjust output level when using 1 LFE input from a 5 1 amplifier or processor 2 Volume Control for HI LOW INPUT Use to adjust output when using either HIGH LEVEL or LOW LEVEL input Do not use both simultaneously 3 Crossover Used to select crossover frequency Variable between 30Hz and 120Hz 4 1 LFE INPUT Used to connect to the 1 LFE output from a 5 1 amplifier of processor Should be used in conjunction with REL HIGH LEVEL connection for the ultimate theater experience 5 LOW LEVEL INPUT Used to connect LOW LEVEL to the output of a preamplifier integrated amplifier or receiver ONLY when HIGH LEVEL INPUT cannot be properly connected For home cinema use 1 LFE INPUT 6 Phase Used to set phase 0 180 degrees 7 HIGH LEVEL INPUT Neutrik Speakon Socket Use to connect HIGH LEVEL to the main front amplifier speaker terminals 8 Power ON OFF Sw
19. over running in will be rewarded by many years of pleasurable use Both the electronics and the drive unit will benefit from an initial period of carefully controlled use Possible damage may be sustained by running in the unit at too high a volume setting over an extended period On the other hand by taking a little care over this initial period about 24 hours of actual use a longer life with an eventual higher potential performance is assured Care and Polishing The cabinets are best maintained by using a light automotive spray on wax and a micro fiber cloth We use a spray on made by a company called Griot s Garage While this may not be available in all markets you can use a similar product Take care not to spray the aluminum badges Do not place objects such as drinks on top of your REL Serie T Never use a dry cloth on this finish Technical Serie T uses a very fast gentle and transparent filter intended to allow excellent impulse response and a natural sound We refer to this circuit as Natural Rolloff Most subs use slow very steep filters that lend an unnatural machine like quality to the sound The Serie T power amplifiers are conventional Class A B linear power supply amplifiers unusual at this price as most designs use a simple Class D amp These designs feature robust high current power supplies and are bulletproof Our priority is for the most reliable circuit we know and we have logged millions of hours of playing t
20. ssover circuit REL Set Up Made Simple REL products are not traditional subwoofers but are true Sub Bass Systems A REL is designed to augment the performance of full range speaker systems in order to provide in certain cases linear response below 12 Hz Therefore for the moment set aside everything you ve been taught about subwoofers and how they are integrated into a stereo or home cinema system REL Sub Bass Systems set up and positioning differs from conventional subwoofers A REL will take advantage of physics and room acoustics to provide deep pressurization as no traditional subwoofer can It is important that you bring to the set up process a willingness to do things a little differently in order to obtain these superior results The end result of your labours will be an utterly seamless integration of true deep bass to a sound system regardless of the main speakers low bass capability Basic set up should take no more than ten to fifteen minutes to accomplish once connected Before You Begin 1 It is helpful to know that you will almost always connect the REL to the input on the rear panel labeled HIGH LEVEL INPUT This connection is made using the supplied 34 10 10 meters cable the bare leads of which connect to the speaker output terminals of the power amplifier The easy and foolproof connection at the REL is done with a Neutrik Speakon connector The purpose of connecting to the speaker output terminals is
21. up or at 12 o clock on the crossover control or slightly higher for smaller speakers At this point turn the HI LOW LEVEL control up so that both the REL and speaker are roughly equal in volume and then switch using the phase switch from O to 180 phase positions Again whichever position is loudest or fullest is the correct position That is when the position is working in harmony with your main speakers reinforcing bass not cancelling it Placement The next step is to determine precisely how far from the corner the sub should be placed to achieve the most efficient output as well as the lowest frequency extension With the REL fully into the corner and pointing straight out along the diagonal coming out of the corner continuing to play the music slowly pull the REL from the corner on the diagonal equidistant from both side and rear wall At a certain point sometimes a matter of only a few inches in rare cases a foot or more the REL will audibly go lower play louder and if it truly locks on to the room and is fully pressurizing it the air around the REL will seem to be energized stop right there This is the correct position from the corner for the REL Crossover and Level Settings To determine the crossover point take the volume of the REL using the HI LOW LEVEL control all the way down and put the crossover to 30 Hz At this point bring the REL s volume back up slowly to the point where you have achieved a subt
22. vity The purpose of the rear channel REL is to ensure proper front to rear balance and weight too often virtually ALL the power and weight in a theater comes from the front and it produces unnatural weighting as well as hot spots By placing a rear REL diagonally opposite bass transects the room on a tangent and has the effect of greatly smoothing overall in room response of your RELs This unit need not be a duplicate of your primary REL instead it should match well with your surround speakers 3 Connect to the center channel a third REL using ONLY the HIGH LEVEL connection This may be easily accomplished by connecting directly to the connection terminals on the rear of the center channel speaker To do so first twist the red and yellow leads together and connect to the positive terminal then connect the remaining black lead to the negative black terminal on the rear of the speaker The purpose of the third center RELis to ensure the center channel can keep up with the scale weight and dynamics the main system now has Location should be anywhere from the opposite corner of the front wall to somewhere in the middle of the front wall listen for best integration with the center channel speaker Some people prefer to use the REL as an actual pediment or stand for their center channel the choice is yours Again this unit need NOT be an exact duplicate of the primary REL but should be chosen for its acoustic ability to mate seamlessly with your
23. wires and connect this pair to the positive center channel speaker terminal Supplied Neutrik Speakon HIGH LEVEL Interconnect Amplifier Main Speaker Outputs 10 e If connecting a REL as a dedicated rear channel sub connect the black wire of the REL to either the left rear or right rear negative speaker terminal connect the yellow wire to the left rear positive speaker terminal connect the red wire to the right rear positive speaker terminal Supplied Neutrik Speakon HIGH LEVEL Interconnect Amplifier Main Speaker Outputs LOW LEVEL connection via phono connector is always an option if HIGH LEVEL connection is not possible When connecting to the LOW LEVEL inputs in a system in which HIGH LEVEL connection is not possible such as if using internally amplified speakers connect a single phono cable between the LOW LEVEL input jack of the REL and either the left or right channel output of your preamplifier Because virtually all sub 35Hz bass information is mono there is no need to connect both left and right channels When connecting to a home cinema system where an 1 LFE channel output is present connect a single phono cable between the sub output of the processor receiver and the 1 LFE input jack on the REL Positioning The optimal position for a REL is in one of the corners behind the main speakers This position provides 9 dB of acoustic amplification and allows for the most linear true low bass wave launch owing to the abi
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