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REL Acoustics G1 Mk II Operating Instructions Manual
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REL Acoustics G1 Mk II Operating Instructions Manual

Sub-bass system
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Summary of Contents for REL Acoustics G1 Mk II

  • Page 2 Operating Instructions for the G1 Mk II Sub-Bass System...
  • Page 3 Caution Marking Explanation The lightning flash with arrowhead symbol within an equilateral triangle is intended to alert the user to the presence of 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: Important Safety Instructions

    Important Safety Instructions 1 Read all of these instructions. 2 Save these instructions for future use. 3 Heed all warnings. 4 Follow all instructions. 5 Do not use this apparatus near water. 6 Clean only with automotive polish and micro fiber cloth. 7 Install in accordance with the manufacturer’s instructions.
  • Page 5 Warning To reduce the risk of fire or electric shock, do not expose this apparatus to rain or moisture. The apparatus shall not be exposed to dripping or splashing and no objects filled with liquids, such as vases, shall be placed on apparatus. The mains plus is used as disconnect device.
  • Page 6 Attention Explication Marquage L’éclair avec le symbole de pointe de flèche dans un triangle équilatéral est destiné à alerter l’utilisateur de la présence de non isolée 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.
  • Page 7 Informations Importantes Relatives a la Securite 1 Lisez attentivement ces instructions. 2 Conservez ces instructions. 3 Respectez tous les avertissements. 4 Suivez toutes les instructions. 5 Ne pas utiliser cet appareil près de l’eau. 6 Nettoyez seulement avec du vernis automobile et tissu microfibre. 7 Installer conformément aux instructions du fabricant.
  • Page 8 Avertissement Cet article est lourd. Pour éviter tout risque de blessure, prendre soin lors de la manipulation. L’appareil ne doit pas être exposé à des éclaboussures et aucun objet rempli de liquide, comme des vases, ne doit être placé sur l’appareil. Les conduites Plus est utilisé...
  • Page 9 Dear G1 Mk II Owner Thank you for your purchase of our G1 Mk II. This is a special product to us, part of the growing REL Reference family of products along with the No. 25 that commemorates our 25th year of producing the finest Sub-Bass Systems extant.
  • Page 10 7 High-Level Input (Neutrik Speakon): Used to connect to the main front amplifier speaker terminals. 8 High-Level Output (Neutrik Speakon): Used to connect or “daisy chain” another REL G1 Mk II in tandem. 9 Power On/Off Switch: Use to turn unit on or off.

  • Page 12: Connectivity And Functionality

    Connectivity and Functionality 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.
  • Page 13 LED Display An LED display is located on the lower front of G1 Mk II. All functions that are user adjustable via the remote control can be seen here. The display reverts to off a few seconds after adjustment. Remote Control Battery Installation G1 Mk II’s Remote Control Unit requires two AAA batteries.
  • Page 14 Always switch off your system before disconnecting any wires. To increase the versatility of connecting up, the G1 Mk II models have three separate inputs. A high-level input socket, a .1/LFE input consisting of both RCA and XLR connectors, and a low-level input that includes two RCA sockets for stereo input.
  • Page 15 REL Set-Up Made Simple REL products are not traditional subwoofers, but 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 15Hz. Therefore, for the moment, please set aside everything you’ve been taught about subwoofers and how they are integrated into a stereo or home cinema system.
  • Page 16 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 producing NO additional load on the rest of your system. •...
  • Page 17 Differential (i.e. Fully Balanced) NOTE: G1 Mk II models are equipped with internal circuitry to allow connection to many Class-D (digital) amplifiers. Warning: Do NOT connect the Black wire to the main Class D power amplifier’s speaker ground terminal.
  • Page 18 • When connecting RELs to Mono Bloc amplifiers (2) RELs, one for each amplifier, must be used. 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.
  • Page 19 • If connecting a single REL as a dedicated centre channel sub, an insider tip is to consider connecting to the rear of the speaker, rather than routing the REL High-Level enable all the way back to the amplifier. Connect the black wire of the REL to the negative centre channel speaker terminal; twist together the red and yellow wires and connect this paired cable (red/yellow paired together) to the positive centre channel speaker terminal.
  • Page 20 RCA or XLR to XLR cable between the sub output of the processor/receiver and the .1/LFE input jacks on the REL. 1 Positioning: The optimal position for a single REL G1 Mk II is in one of the corners behind the main speakers.
  • Page 21 4 Corner Fine Tuning: (When Setting up for Stereo G1 Mk II it is Possible that Placement is Not Corner Loaded and this Step May be Omitted). 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.
  • Page 22 +3 and +6 db additional output depending upon positioning. In and of itself, this is of only passing interest in most instances since even a single G1 Mk II is capable of profound output.
  • Page 23 Set-Up: When setting up stereo G1 Mk IIs, 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.
  • Page 24 Since there will be a preponderance of output available to a stereo G1 Mk II owner, focusing on connection with and blending with the main speaker becomes the primary focus, not merely...
  • Page 25 Note: RELs use massive power supplies that can require 3-4 days to fully charge. During this time, your G1 Mk II sub will begin to play louder. This is normal. It may require the user to lower the volume slightly during this period.
  • Page 26 (unlocked mode). At this point the remote control will not operate the G1 Mk II. In order to pair the remote control unit with the sub-bass system, point the remote control unit’s emitter at the LED display and hold the PHASE switch for 5 seconds. The LED under the CROSSOVER control will flash once and the display on the Sub-Bass System will read “–...
  • Page 27 Theatre Applications For Dolby Digital AC3 or other 5.1 theatre 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 processor to the “large”...
  • Page 28 Technical G1 Mk II employs an advanced filter circuit which provides exceptional performance when coupled to the rest of the signal chain of the Sub-Bass System. A second-order variable low-pass filter approximating a Bessel function was chosen for its linear phase response, which equates to flat group delay. This means that,...
  • Page 29 A thermal overload device is fitted to all G1 Mk II Sub-Bass Systems. If the unit is deliberately over-driven this device will sense the temperature rise and cut the output; recovery time is approximately five minutes.
  • Page 30 Supplied Accessories Mains Lead: Neutrik Speakon Interconnect: Yes (10 Meters Nominal) Users Manual: Batteries (AAA x 2): Spikes (x 4): Allen Key (2.5mm): In the interest of product development, REL Acoustics Limited reserve the right to vary these specifications without notice...
  • Page 31 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...