User manual RANE THX 22

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Manual abstract: user guide RANE THX 22

Detailed instructions for use are in the User's Guide.

[. . . ] See the Operating Instructions on the page Manual-4 for alignment information. Install the supplied security cover after completing all settings. Be sure the POWER light fits snugly into the hole in the security cover. Never connect anything except an approved Rane power supply to the thing that looks like a red telephone jack on the rear of the unit. [. . . ] Use only high-grade RCA cables for interconnect to the controller outputs. CHASSIS GROUNDING If after hooking up your system it exhibits excessive hum or buzzing, there is an incompatibility in the grounding configuration between units somewhere. Your mission, should you accept it, is to discover how your particular system wants to be grounded. Try combinations of lifting grounds on units that are supplied with ground lift switches or links. If your equipment is in a rack, verify that all chassis are tied to a good earth ground, either through the line cord grounding pin or the rack screws to another grounded chassis. Units with outboard power supplies do NOT ground the chassis through the line cord. Make sure that these units are grounded either to another chassis which is earth grounded, or directly to the grounding screw on an AC outlet cover by means of a wire connected to a screw on the chassis with a star washer to guarantee proper contact. Sometimes cable TV systems can introduce another ground loop in combination with grounded amplifiers. Using an isolation transformer between grounded audio components may solve the problem. See Rane models BB 44x or BB 22. Manual-3 OPERATING INSTRUCTIONS STEREO EQUALIZATION Depending on your philosophy, equalizers can perform the role of fancy tone controls or correct speaker power response in a room. The room is an extention of the speaker cabinet, for the same speaker can sound different in different rooms. Even more critical are in-wall speakers, which depend on the wall as an extension of the cabinet, but not all walls have the same construction or size. These differences are more noticeable and specific in the lower frequencies where 1/3-octave EQ is required. The high frequencies need less control, as they are less susceptible to room acoustics. The THX 22 can be adjusted by ear, but we highly recommend the use of a 1/3-octave realtime analyzer or other similar test equipment. The results will be more accurate with less response variance from channel to channel. SURROUND CHANNEL ALIGNMENT Whether the home cinema system is Dolby Pro-Logic, Home THX, or Dolby Digital, the same principle applies: to flatten the power response of the surrounds in the room. Even though the controller may have a preset filter for a given listening mode, set the surrounds for a flat power response, just like the front channels. Since surrounds may be of a different design than the front channels, equalization can help the front and rear speakers sound more similar, important when the sound pans from front to back (as the spaceship flies overhead). Test equipment is required to properly align a multichannel system, such as a 1/3-octave realtime analyzer, preferable a model with a memory averaging function. Follow the instructions with the analyzer. Though more time consuming, a test CD and a sound pressure level meter can work. For this method, see the RaneNote on Home Theater Systems, available from the factory or downloadable from the Rane web site. [. . . ] Once alignment is complete, remove the analyzer and connect the cables to their normal routing. Once equalization for all channels is set, perform a final channel level check with the Dolby Test on the processor. Use the enclosed security cover to guard your precious settings from inquisitive guests. USING THE BYPASS SWITCH The THX 22 provides an overall BYPASS switch & indicator as a useful tool for optimizing settings. [. . . ]

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