User manual SMART DEVICES CENTER SURROUND 3X 01-18-2000

[. . . ] Our limited warranty does not cover damages resulting from accident, misuse or abuse, lack of responsible care, or failures not attributable to manufacturing defects, except as provided herein. makes no warranties, express or implied, including warranties of merchantability or fitness for a particular purpose. RETURN POLICY: Factory authorization MUST be obtained before returning any product. A 15% restocking charge will be issued on unused equipment (in original box) that is returned for credit. [. . . ] By separating the surround speakers on the back wall of the cinema into a separate group, these speakers can deliver sounds from the rear wall channel which are separate from the left wall and right wall channels. Page 6 INSTALLATION AND OPERATION INSTALLATION Find an appropriate place in the rack to mount the CS-3X. A good place is between the stereo processor and the power amps since the wiring will follow this path. Since the CS-3X is only one rack space high, often you can just use it to replace a vent or blank panel. This may be important if space is at a premium. If you are retrofitting an existing installation, you must also provide a place in the sound rack to mount another power amplifier for the required additional amplification channel(s) for the rear surround speakers. Depending on the existing setup, you may already have an additional amplification channel(s) available which can possibly be used for the new channel(s). There are no particular ventilation requirements other than what is typical for other low level processing equipment. However, as always, it is a good idea to keep ALL electronic equipment running cool for best reliability and longest life. WIRING If you are placing this unit into an existing installation, the left surround and right surround wiring from the stereo processor to the power amps must be removed. Wire the left surround and right surround outputs from the stereo processor to the left surround and right surround inputs of the CS-3X. Wire the Left Wall, Right Wall, and Rear Wall outputs of the CS-3X to the appropriate power amplifier inputs. Use standard wiring practices for low level audio circuits. OUTPUT MODES The CS-3X can be used in one of two output modes. In the 3X format, there is no difference regardless of the ouput mode used. The difference appears only in the normal LS-RS format or in BYPASS. Mode One requires that all rear wall speakers be wired as one channel and needs only one channel of amplification. This is the less expensive method of adding the rear channel to a system. In LS-RS format or BYPASS, the Left Surround signal appears in the Left Wall speakers AND in all the rear wall speakers. The Right Surround signal appears in the Right Wall speakers AND in all the rear wall speakers. This gives a partial wrap around effect to the individual Left and Right Surround sounds and does not maintain the channel separation as accurately as Mode Two. Mode One requires a jumper wire be placed on terminals marked CRW1 and CRW2. Mode two requires the CRW1 and CRW2 terminals have NO jumper on them. [. . . ] The PRESENCE LED on the front panel alerts the operator that REAR channel material is present on the digital soundtrack. When this LED is on, there is program material going to the REAR WALL speakers in the auditorium. CS-3X/LS-RS Pushbutton (normally pushed in) POWER/BYPASS Switch PRESENCE LED OPERATOR CONTROLS Page 10 INSTALLATION AND OPERATION EXTERNAL EQ If finer control over the Surround Channels EQ is desired, the CS-3X octave band equalizers can be bypassed, and 1/3 octave external equalizers , such as the SMART EQ6-1/3, can be patched in through the DB25 connector. The pinout is as follows: Left Wall Send Rear Wall Send Right Wall Send Left Wall Return Rear Wall Return Right Wall Return Ground Pin 25 Pin 23 Pin 21 Pin 11 Pin 9 Pin 7 Pins 2, 4, 6, 8, 10, 16, 18, 20, 22, 24 To bypass the internal EQ's, the top cover must be removed, and Jumpers W1, W2, and W3 must be changed to Pins 2 and 3. Normally, these jumpers are on Pins 1 and 2 as shipped from the factory. Jumpers W1, W2, W3 VOLTAGE SELECTION AND GROUND LIFT The CS-3X has soldered-in jumpers for voltage selection and ground lifting. [. . . ]