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Фрагмент инструкции
They indicate thatthe output signal istoo high. 3 SIG: Signal Indicators These indicators display the current output level. When the output is greater than 0.5 W (8 Q), the green indicator lights. 4 Attenuators Adjust the attenuators to set an appropriate volume level. * When you use a BTL connection, control the volume with the Attenuator of CHANNEL A. 5 Air intake fan, air intake This is the fan and air intake for the orced air cooling system that cools the interior of the amp. Depending on the surface temperature of the heat sink (50 degrees C), the fan speed will change in two levels. * To avoid impairing the cooling capacity, do not place the unit in a location where the air intake would be blocked. 6 POWER: Power Switch / Power Indicator When turned on, the unit is turned on and readied for operation. * When the power amplifier is turned on, Power Indicator lights up. * Always set the Attenuators to dB" whenever the Power Switch is turned on or off. * The amplifier contains a protection circuit which mutes the output for a few seconds after power up. This is to protect the speaker systems from power surges. 2. Rear Panel < SRA-260 > < SRA-540> < SRA-800> 1 Speaker Terminals Connect the speaker systems to these terminals. * Use speaker systems of 8 Q impedance (or higher) in a BTL connection, and systems of 40 (or higher) in other setups. * WARNING: THESE TERMINALS ARE FOR THE CONNECTION OF SPEAKER SYSTEMS ONLY. * To avoid electric shock, do not touch the terminals while the unit is operating. 2 Input Connectors XLR-3-31 type connectors are provided. The corresponding pins of each connector are wired in parallel so that you can effectively use them for Parallel connections. You can therefore send an exact copy of the input signal to the next input jack. 3 Input Terminals These terminals input the signal. The pins of the input jacks and the pins are connected in parallel. 7 Ground switch When the Ground switch is in the "LIFT" position, the pin 1 ground of the input connectors and the chassis ground will be disconnected. When connecting two or more units as a system, this can avoid the hum caused by a ground loop. * Normally this should be set to the jjj (GND) position. 8 Limiter switch When the Limiter switch is turned on, the input signal will automatically be adjusted immediately before the power amp would clip. By holding down excessive input levels, this prevents problems from occurring. 9 MODE: Mode switch This switch selects the operating mode. STEREO: CH A and CH B work independently. The unit functions as a stereo power amplifier. BTL: CH A and CH B are connected in a BTL configuration. The unit functions as a mono power amplifier. 4 Air exhaust fan/vent This is the fan and exhaust vent for the forced-air cooling system that cools the interior of the amp. Depending on the surface temperature of the heat sink (50 degrees C), the fan speed will change in two levels. * The SRA-260 has only an exhaust vent, and has no exhaust fan. * To avoid impairing the cooling capacity, do not place the unit in a location where the air exhaust vent would be blocked. 5 GND (ground) terminal This is the terminal for grounding. When hum or noise are produced, ground the unit using this terminal. * Please note that grounding the unit with this terminal might increase the hum or noise. However, such a case is extremely rare. 6 Input Jacks These jacks accept incoming audio signals. Use a 1/4 inch phone plug for unbalanced input and a 1/4 inch TRS phone plug for balanced input. * Never attempt to mix audio signals by applying more than one source of input to the unit at the same time (by using more than one of the three possible input paths, consisting of the input connectors for each channel, the input jacks and input terminal). * Be aware that you will cause the COLD terminal to short with the GND terminal on the input connector if you attempt to apply input to both the input jacks (unbalanced input) and the input connector at the same time. * The pin configuration of the inputs is as follows. Before making connection, make sure of the pin configuration for the devices being connected. Ground (SLEEVE) Ground (SLEEVE) Cold (RING) 1: GND 2: HOT 3: COLD 9 Setup Examples * This is a high-output amplifier and should only be used with speaker systems capable of handling high power levels. Pay particular attention to the setting of the Attenuator dials. * To prevent malfunction and/or damage to speakers or other devices, always turn down the volume, and turn off the power on all devices before making any connections. * Once the connections have been completed, turn on power to your various devices in the order specified. By turning on devices in the wrong order, you risk causing malfunction and/or damage to speakers and other devices. Preamp, Mixer, etc. -> SRA-260/540/800 * This unit is equipped with a protection circuit. A brief interval (a few seconds) after po...