REL Acoustics No. 25 Operating Instructions Manual Download | Manualshive

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Set-Up:

When setting up stereo No.25s, it is possible to place both units in the front corners of the room,

carefully toed-in and placed per normal guidance in this manual. Connect each sub to the speaker terminal
outputs based on the following diagrams for standard stereo amp, non-balanced mono blocks or balanced
differential mono blocks.

Standard High-level

Mono Bloc

Mono Bloc Differential

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Summary of Contents for No. 25

Page 1: ......

Page 2: ...Operating Instructions for the No 25 Sub Bass System ...

Page 3: ...un insulated dangerous voltage within the product s 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 ...

Page 4: ...y 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 a 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 li...

Page 5: ...ected from the power input the mains plug of the apparatus shall me disconnected from the mains An appliance with a protective earth terminal should be connected to a mains outlet with a protective earth connection Design Safety This apparatus is supplied with a detachable mains cord For 240V operation a 3 15 S 2 5A S 3 5A S 5 fuse is fitted in the socket for 120V operation a 6 3A S 2 9A S 3 9A S ...

Page 6: ...solée tension dangereuse à l intérieur de l enceinte du produit qui peut être d une ampleur suffisante pour constituer un risque d électrocution pour les personnes Le point d exclamation dans un triangle équilatéral est destiné à alerter l utilisateur de la présence d instructions dans la documentation accompagnant l appareil exploitation et de maintenance entretien ...

Page 7: ...es des prises de courant et le point de sortie de l appareil 11 Utilisez uniquement des fixations accessoires spécifiés par le fabricant 12 Utilisez seulement avec un chariot stand trépied support ou table spécifié par le fabricant ou vendu avec l appareil Lorsque vous utilisez un chariot soyez prudent lorsque vous déplacez l ensemble chariot appareil pour éviter les blessures en cas de chute 13 D...

Page 8: ...NT This device complies with Part 15 of the FCC Rules Operation is subject to the following two conditions 1 This device may not cause harmful interference and 2 This device must accept any interference received including interference that may cause undesired operation NOTE This equipment has been tested and found to comply with the limits for a Class B digital Device pursuant to Part 15 of the FC...

Page 9: ...mance potential of the No 25 driver and so we turned to our newest amplifier design a specially developed Class D amplifier that produces a continuous 1 000 watts and can deliver yet higher output on peaks Naturally this amplifier has already proven itself to be rugged and reliable in the field so feel comfortable trusting our commemorative design to this beast of an amp It All Begins Up Front To ...

Page 10: ...ingle frequency from building up a dominant mode It is this stiff fully braced like a fine musical instrument design that allows the full palette of tonal colors to emerge from No 25 along with the prodigious dynamics for which it is quickly becoming known Even the Bass String grille has been designed with an eye to beauty and airflow allowing enormous displacement of air to pass through without r...

Page 11: ...Level Volume control for High Low Input Use to adjust output when using either High Level or Low Level input Also used to a adjust Parametric EQ level 4 Filter Used to select filter operation 5 Phase Used to set phase 0 180 degrees 6 Security Used to lock remote settings To extend battery life of the remote always leave the toggle switch in the locked position when not in use 10 REL No 25 Remote C...

Page 12: ...d Output Balanced XLR connector version of 1 LFE Output For use only with fully balanced cables 8 Ambient Trig Used to turn ambient light on the underside of the sub on and off by a 12VDC trigger 9 Ambient Control Used to pre set the amount of ambient light from the underside of the sub 10 Parametric Filter Used to engage parametric filter into the signal path 11 Antenna Connector Used with REL Lo...

Page 13: ...12 8 9 10 11 12 13 1 2 3 4 5 6 7 14 15 16 17 18 ...

Page 14: ...ug one end of the RCA to RCA cables into the LOW LEVEL INPUT jacks of the REL and the other end into the left and right channel output of your preamplifier Phase Switch Used to set phase Phase Switch on remote control is momentary Refer to display for 0 or 180 degree status Phase selection affects High Level Low Level and 1 LFE inputs PHASE SELECTION AFFECTS BOTH HIGH AND LOW LEVEL INPUTS Crossove...

Page 15: ...itch in moved to the next three positions the intensity will increase The ambient lights can be triggered off for theater viewing with a common 12VDC trigger 0V at AMBIENT TRIG keeps the lights ON 12V at this trigger input turns them OFF Remote Control Battery Installation No 25 s Remote Control Unit requires two AAA batteries These are not installed but are supplied To install or replace batterie...

Page 16: ...ried 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 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 r...

Page 17: ...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 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 o...

Page 18: ...lack wire to a negative speaker terminal Instead it should first be allowed to float or hang down without connection to ANY terminal Should hum occur using this method please try connecting to an unused RCA connector on the rear of a preamp or amplifier Please contact your dealer should there be any questions concerning this or any other hookup procedure NOTE No 25 models are equipped with interna...

Page 19: ...nnel 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 In some instances this will result in exceptionally high gain output from the RELs If it seems simply too high in gain please remove either the red or yellow wire from the twisted pair This will reduce output by half and restore a natural...

Page 20: ...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 If the amplifier is of balanced differential design please follow the instructions in the section above labeled Differential Connection Low level connection via RCA connectors is always an option if high level connection is...

Page 21: ...d large scale bass signature This track is perfect for the set up process and should be played at the highest reasonable level expected for system playback 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 fro...

Page 22: ...t 6 Crossover and Level Settings To determine the crossover point take the volume of the REL using the HI LO Level control all the way down and put the crossover to 30Hz At this point bring the REL s volume back up slowly to the point where you have achieved a subtle balance i e the point at which you can just hear the No 25 even with the main speakers playing First bring the crossover point up un...

Page 23: ...n studios we found 2 dB at 25Hz and 2 dB at 43Hz crossover frequency was set to 34Hz produced evenness of output and the overall result was found to be much more consistent across the entire bass range More impressive in long term listening were improvements in clarity extending all the way up into the upper midrange This is clearly the result of a slight reduction in mid bass overhang that the 43...

Page 24: ... of the room carefully toed in and placed per normal guidance in this manual Connect each sub to the speaker terminal outputs based on the following diagrams for standard stereo amp non balanced mono blocks or balanced differential mono blocks Standard High level Mono Bloc Mono Bloc Differential ...

Page 25: ... you are unfamiliar with standard REL set up procedure for gain phase and crossover settings See page 17 for standard set up procedure 2 Carefully fine tune the position of the sub in its recommended location slightly behind and to the outside of the main speaker listening for rich powerful room nodes but focusing on speed and connection with the main speaker Since there will be a preponderance of...

Page 26: ...film sound configuration each channel will require a single main 1 cable as well but additional units 1 LFE connections in a tower may be daisy chained to minimize clutter Stacked No 25 subs have the ability to effortlessly energize even the largest of salons with huge wavefronts of air from the most delicate cello pizzicato to the most crushing of pipe organs played at triple forte No 25 possesse...

Page 27: ...egree of space and timing from the special audio effects For an even greater sense of space and impact a second REL connected in parallel to the centre channel will prove to be a dramatic improvement as well And if that is not enough a rear REL both to support the rear channel speakers as well as to evenly distribute LFE through the room truly completes the full range sonic picture for state of th...

Page 28: ...t please contact your dealer We believe that the importance of the electronics cabinet and drivers being designed to work in harmony is paramount This belief allows No 25 to achieve the highest possible level of fidelity Overload Protection All REL Sub Bass Systems are designed as true sub bass speakers They are designed to reproduce those exceptionally deep notes that are felt as well as heard Th...

Page 29: ...that is enabled when the power mode switch on the rear of the unit is set to the STANDBY position In this mode the input signal is constantly monitored for audio activity If not audio information is detected over a period of 30 minutes the unit will enter a low power standby mode in which less power is consumed When input signal activity is detected the unit resumes normal operation By using the s...

Page 30: ... the wireless receiver disabled During initial setup use the REL this way If you are using a REL Longbow transmitter for initial setup the wireless switch must be enabled please follow instructions for pairing included in the REL Longbow transmitter manual ...

Page 31: ...After initial setup if you wish to employ the standby mode simply move the power mode switch into the up position to STANDBY Power Draw Model Standby Standby w wireless Idle No 25 0 5 Watts 1 Watt 40 Watts ...

Page 32: ...n System Fully Electronic with SET SAFE Yes D C Fault Yes Output Short Yes Mains Input Voltage 220 240 volts 110 120 volts for certain markets Fuses 7 Amp semi delay 230 volts operation 15 Amp semi delay 115 volts operation Dimensions WHD Including feet and rear panel controls 29 x 21 3 x 30 in 736 5 x 540 x 762 mm Add 1 75 in 44 5 mm in depth when using high level connector Net Weight 168 lbs 76 ...

Page 33: ...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 ...

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