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Фрагмент инструкции
9. Circuit breaker The circuit breaker replaces common disposable fuses. This circuit breaker will trip if there is a fault with the main voltage or if maximum output is exceeded. Simply depress the circuit breaker and power up the unit again. 10. AC input This is an IEC connector for your included AC power cable. PROTECTION The CV-5000 incorporates protection features. The front panel Protection LED indicates the activity of the relay speaker connection circuitry in each channel. When the Protection LED turn on, this circuitry is active and all connected speakers are muted. Initial Power Up - For approximately five seconds after initial power-up, the protection circuitry is activated and the speaker outputs are muted. If everything is operating normally, you will hear an audible click at the conclusion of this brief period, as the protection circuitry is deactivated and the amplifier begins delivering signal to connected speakers. It is normal for the Protection LED to fade gradually after the amplifier is powered off. Thermal Protection - Abnormally high heat sink temperatures will engage the Protection circuitry for the overheating channel only. An output relay disconnects the speakers until normal temperature range is restored. During this time, the Protect LED will light. To guard against this problem, make sure the CV-5000 receives adequate ventilation on all sides and that both the front and rear panels are unobstructed. If the power transformer gets too hot, its thermal switch will disconnect all of the secondary power and disconnect both channel outputs. Short Circuit - If output is shorted due to faulty wiring, the thermal circuitry will automatically protect the amplifier. If this occurs, the load will be disconnected by the thermal protection circuitry (also, the output relay opens). DC Voltage Protection - If an amplifier channel detects DC voltage at the speaker output, the output relay immediately opens to prevent speaker damage. Subsonic Frequency Protection - Built-in High Pass Filter provides subsonic frequency protection for each channel. Current Limiting Protection - At the amplifier’s full power limit, (or clipping point) the limiter circuitry will be activated. This is indicated by illumination of the Clip LED. The channel gain is automatically reduced, protecting the speakers from damage. This circuitry may be activated by uncontrolled feedback, oscillations,or improper equipment gain settings. This circuitry is virtually transparent in operation, and full signal bandwidth is maintained. Any time the Protection LED lights up (except for approximately 5 seconds during initial power-up), there is reason to be concerned. If this occurs, turn the amplifier off immediately and check carefully all wiring and external equipments in order to locate and correct the condition. 502-HPA4000B-2121_01_Page_4 02 SETUP Clip Limiter Clipping is the result of an amplifier running into a power supply limitation. The maximum output voltage that any amplifier can produce is limited by its power supply. Attempting to output a voltage (or current) level that exceeds the power supply results in a “flattenin” effect on the signal, making it’s waveform look cut off or “clipped”. A clipped waveform exhibits extreme harmonic distortion, dominated by large amplitude odd-ordered harmonics and making it sound harsh or dissonant. The clip limiter detects this and reduces the gain to minimize the amount of overdrive. To preserve as much of the program dynamics as possible, limiting reduces the average program level until peaks barely clip. Each channel has its own clip limiter, and you can switch it on or off. When driving full-range speakers, clip limiting reduces high frequency distortion caused by bass overload. It also protects higher frequency drivers from excess overdrive and harsh clipping harmonics. HPF (Hi-Pass Filter) A filter having a passband extending from some finite cutoff frequency (not zero) up to infinite frequency. Also known as a low-cut filter. HPF rolls off signals below 30Hz or 50Hz, removing the frequencies below the selected roll off. Reproduction of the signal’s bass portion is thus optimized, since ultra-low, distracting frequencies are eliminated, and more power is available for the reproduction of the wanted segment of the signal. You should set up the filters so they best suit the frequency response of your speakers, since some speakers are particularly sensitive to over-excursion. The 50Hz filter works well with most compact full-range speakers. 01 Mode Select Stereo Mode In stereo mode, both channels operate independently, with their input gain controls. Signal at channel 1’s input produces output at channel 1, while signal at channel 2’s input produces output at channel 2’s output. Recommended minimum nominal load impedance for stereo operation is 2 ohms per channel. Parallel Mode When set to Parallel mode, a signal applied to channel 1’s input will be amplified and appear at outputs ...
Эта инструкция также подходит к моделям:Автоусилители - CV-5000 (1.08 mb)