User manual PEAVEY CA-A540B

[. . . ] Right up front at the power source, CinemAcousticsÕ amplifiers utilize massive power transformers, which are based on a new approach to power transformer design, optimizing both cost and performance. On the power delivery side, these amplifiers utilize the latest in semiconductor power device technology and implement a unique, two-speed fan-cooled heat sink arrangement, insuring quality and ruggedness. The features and performance found in these amplifiers place them in a class of their own Ñ the CinemAcoustics line!Each amplifier is attractively packaged with rugged rack-mountable construction. [. . . ] The screw terminals marked Ò+Ó are the power amplifier outputs for each channel. The remaining screw terminals are ground (chassis). the minimum recommended speaker load impedance is 4 ohms per channel , or 8 ohms in BRIDGE mode. Operation into loads below the recommended load impedance can result in temporary amplifier shutdown due to internal fault sensing. (8) SPS SWITCH This switch is used to either ENABLE or DEFEAT the SPS safety compressor. Normally, the SPS switch should be in the ENABLE position to minimize the possibility of a channel going into clipping or overload. With SPS defeated, a severe overload could cause the unitÕs circuit breaker to trip. (9) MODE SWITCH This switch is used to select either STEREO or BRIDGE mode for the amplifier operation. Care should be exercised whenever the BRIDGE mode is selected. Accidental selection of this mode could cause damage to loudspeakers, particularly in BIAMPED systems. NOTE: Peavey does not recommend the use of BRIDGE mode for normal theater applications. When used with CinemAcoustics signal processors, these controls should be left in the full clockwise position. These inputs are balanced electronically, with the terminals marked Ò+Ó as the positive amplifier inputs, and the terminals marked Ò-Ó as the negative amplifier inputs. the remaining terminals are ground (chassis). If possible, always use two-conductor, shielded cables when interconnecting to the amplifier; connecting the twisted pair to the respective Ò+Ó and Ò - Ó terminals of each amplifier channel, and the shields to the amplifier ground. When connecting to a CinemAcoustics Cinema Processor, or to any signal processor with a balanced output, connect the Ò+Ó, Ò - Ó, and ground inputs of the power amplifier to the respective Ò+Ó, Ò-Ó, and ground outputs of the processor. When connecting the amplifier to a Cinema Processor with a single-ended output, again, use a two-conductor, shielded cable and wire the cable to the amplifier as outlined above. at the processor end , wire the Ò+Ó amplifier input to the Cinema Processor Ò+Ó output , and wire the Ò-Ó amplifier input together with the amplifier shield to the Cinema Processor ground. The amplifier can be wired in an unbalanced configuration using single-conductor, shielded cables by connecting the single conductor to the Ò+Ó input of each channel, and connecting the shield to both the Ò-Ó input and ground of each channel. A similar connection must be made at the Processor as well. All input and output connections, as well as level controls, selector switches, and the mains circuit breaker are located on the rear panel. The mains power switch, and the LED indicators for power and SPS activation are located on the front panel. [. . . ] If the product or component must be shipped to Peavey for warranty service, the consumer must pay initial shipping charges. If the repairs are covered by warranty, Peavey will pay the return shipping charges. How To Get Warranty Service (1) Take the defective item to your Authorized CinemAcoustics Dealer or Authorized Peavey Service Center. Some states do not allow limitations on how long an implied warranty lasts, so the above limitation may not apply to you. [. . . ]