User manual PEAVEY CS 1200X

[. . . ] A A lntended to alert the user to the presence of uninsulated "dangerous voltage" within the product's enclosure that may be of sufficient magnitude to constitute a risk of electric shock to persons. Intended to alert the user of the presence of important operating and maintenance (servicing) instructions in the literature accompanying the product. CAUTION: Risk of electrical shock - DO NOT OPEN!W A R N I N G : To prevent electrical shock or fire hazard, do not expose this appliance to rain or moisture. Before using this appliance, read the operating guide for further warnings. propcisito de alertar al usuario de la presencia de "(voltaje) peligroso" que no tiene aislamiento dentro de la caja de1 product0 que puede tener una magnitud suficiente coma para constituir riesgo de A Este simbolo tiene el prop&it0 de alertar al usario de la presencia de instruccones importantes sobre la operacicin y mantenimiento en la literatura que viene con el producto. PRECAUCION: Riesgo de corrientazo - No abra. [. . . ] This is a potentially dangerous situation, especially if the individual chan-nels are being used to supply high and low signals in a typical biamp configuration. Obviously, the speaker components on Channel B would no longer be supplied their intended signal but an out-of-phase version of the Channel A signal, which could easily destroy the associated IOLKspeaker components. To help prevent this, whenever the bridge mode is selected, the standby ("0") LED and the LED array itself on Channel B is defeated (off), just as if there was some kind of a fault condition present on Channel B. This provides a positive indication that the CS 1000X is no longer in the stereo mode. TRANSFORMER CHANNEL B INPUTS AND SENSITIVITY CONTROL ARE DEFEATED CONNECT LOAD BETWEEN RED BINDING POSTS 7OVIlOOV LINE RANSFORMER X-OVER 0 PATCH PANEL (BRIDGE MODE) WITH JUMPERS INPUT SENSITIVITY CONTROLS The input sensitivity rating of a power amplifier is , he RMS voltage level required at the input to produce full-rated power into the rated load at the output. This voltage then becomes the level at which the associated mixer must operate in order to drive the amplifier to full output. The CS 1200X sensitivity controls are calibrated in decibel volts values rather than RMS voltage (usually listed in typical mixer specs), and as such are more useful, since most contemporary mixers employ LED arrays to indicate mixer output levels and are calibrated in decibel volts. Knowing the power amplifier sensitivity rating in decibel volts will allow the mixer operator to know the status of the power amplifier by noting which LED on the mixer is peaking. Obviously, the LED labeled the same or closest to the sensitivity rating of the power amplifier will indicate full power output of the system. Operation at levels above this rating will cause the power amplifier to clip (produce distortion) unless the associated amplifier has a compressor/limiter to minimize this distortion. Patent #4, 3 l&053), is included in the CS 1200X, and the advantages should be obvious. Without DDT, the sound engineer must "ride gain" on the mixer or employ an outboard limiter in order to prevent amp clipping. With DDT the sound man can relax more and enjoy the "ride. " For maximum mixer headroom (which in 14 turn really is maximum compression range), the input sensitivity control should be set at Ihe maximum clockwise setting. If, however, the amptifier is used in a small club, church, or studio application where the full-output capability of the power amplifier is seldom needed, or there is no need for large amounts of headroom capability, the full-clockwise setting may not be the wisest choice. In this case, it is possible to reduce the overall system noise at the expense of headroom capability by increasing the power amplifier sensitivity as in the following example: if, instead of a sensitivity rating of +3 dB V, we adjust the CS 1200X to a rating of + t2dB V, overall system noise wilt be improved by 9 dB, and the system headroom will decrease 9 dB. DDT'lM COMPRESSION The CS 1200X is a compact and powerful amplifier that features a new type of dynamic compression. This compression system enables the user to maximize the performance of the amptifier/speaker combination. We have determined through much research that the compression circuitry should prevent the power amplifier from running out of headroom (clipping) and should be as simple to operate as possible to avoid undue complication for the user. This compression system is activated by our exclusive DDT compression circuitry, which senses conditions that might overload the amplifier and activates compression when clipping is imminent. In other words, compression takes place whenever signal conditions exist that prevent the amptil`iers from faithfully reproducing the input signal. In this case, threshold is clipping itself, and no specific threshold control is provided. This technique effectively utilizes every precious watt available from the power amplifier. Techniques using external compressors/limiters are usually less effective, severely limit output power levels and require additional controls, and add complexity to an already complicated system. [. . . ] Notrce of address changes - If you move from the address shown on the WARRANTY REGISTRATION CARD, you should notrfy Peavey of the change of address so as to facilitate your receipt of any bulletins or other forms of notification which may become necessary in connectIon with any condrtlon that may requrre dissemrnatron of rnformatron or correction 3 You may contact Peavey directly by telephoning (601) 483-5365 23 IMPORTANT SAFETY INSTRUCTIONS WARNING: When using electric products, basic cautions should always be followed, including the following. 12. Read all safety and operating instructions before using this product. All safety and operating instructions should be retained for future reference. Obey all cautions in the operating instructions and on the back of the unit. [. . . ]