If the power light blinks then goes off, the amp is either going into protect mode or there is a bad connection in the power supply wiring. Generally, the power light is green or blue and the protect light is red but on some amps, the protect light is green and the power light is red.
Look at the silkscreen on the amplifier to confirm the function of the LEDs Some amplifiers have multiple protect lights. For example, some of the Sony amplifiers have lights for power, overcurrent and thermal protection. The lights are always lit when the amp powers up but are normally green.
When there is a fault, the LED changes from green to amber. Many amplifiers show protect when initially powered up mute delay and then switch to green.
This is especially true when the power supply has failed. There are a few amps some JL Audio that will go into protect and none of the indicators change.
This happens when the voltage drops too low when the amp is being driven hard with an insufficient power supply. Sometimes, a VERY brief drop in voltage too short to be seen on a standard multimeter will cause the amp to shut down for a short while.
It's helpful to know how the amplifier behaves when working properly. If your amp is working properly, pay attention the way the indicators light up when powering the amp up. If you don't know how they're supposed to behave, ask around.
Step 1 On-board Fuses: The first thing you need to check is the on-board fuses plugged into the amplifier if it has them. Not many amplifiers will illuminate the protection light when the fuses are blown but a few will so you need to check this. If the fuse holders are melted, you need to have the amp checked by a technician to determine why they melted and to determine if the fuse holders are usable.
Generally, when the fuse holder melts, the contacts become badly oxidized and the clips lose their tempering. This means that they can no longer function properly and will continue to overheat. For those who don't know what a blown fuse looks like, the one on the left below is blown. The one on the right is OK. This means that you must confirm that you have sufficient voltage reaching the amplifier for it to operate properly.
The answer is almost assuredly: "no. Rating Full Article Comments. Frequently Asked Questions. You may also like. What is frequency response and how does it affect my music?
June 30, Do you need a DAC? March 25, 1 comments. Denon releases new M-series compact music system January 23, Objective 2 Amplifier on sale at Massdrop April 20, An "amp", short for ampere, is a unit of electrical current which SI defines in terms of other base units by measuring the electromagnetic force between electrical conductors carrying electric current.
A "watt" is a measure of power. One watt W is the rate at which work is done when one ampere A of current flows through an electrical potential difference of one volt V. A watt can be expressed as It is important to know the terms and formulas on this page because they are helpful in calculating the amount of power and the size of a solar power system, whether it is an off-grid system or one that is grid-connected.
There is also a formula for power. In this formula, P is power, measured in watts , I is the current , measured in amperes , and V is the potential difference or voltage drop across the component, measured in volts. Knowing how much current is flowing to your load is very important in selecting the correct wire. We take the distance into consideration to calculate the voltage loss.
The other half of this calculation is the current. The bigger the wires, the higher the ampacity. So when you choose wiring or cable for a particular application in your RV, for example, you absolutely must know the ampacity rating of that cable. It is relatively common for electrical component companies to mark devices for load size or range in wattage, amps, or volts. You can use this information to calculate ampacity by dividing wattage by voltage.
The ampacity of a device needs to be higher than the amps that will go through it. Knowing this information and determining wire or cable size accordingly could be critical to your safety in terms of preventing electrical fires, as overloading a wire or device will cause it to get very hot and possibly burn up.
DC direct current refers to an electric charge current that only flows in one direction. AC alternating current refers to the current that changes direction a certain number of times per second 60 in the United States. You can measure both types, but electrical devices are only rated to use one type. Do not connect DC devices to AC and vice versa without an inverter or charger in between. For mobile applications like RVs and boats, power receptacles have ratings in amps, 50Amp, 30Amp, 20Amp.
These are the max amp ratings that these outlets can provide before their breaker pops. Many people get these amps confused with battery amps, but they are AC at a higher voltage. While the 50 amp flow may be the same in a battery, remember the voltage is the pressure, and the battery pressure is only 12 volts.
Theoretically, a battery with a capacity of 1 amp-hour should be capable of providing a continuous current of 1 amp to a load the device or appliance using power for exactly 1 hour before becoming discharged. The same 1 amp-hour battery could alternatively provide a continuous current of 2 amps to a load for a half-hour.
You get the idea. As you may recall, the higher the amps, the bigger the wires needed to safely serve the system. You must properly size wires and cables not only to deliver quality power but also to prevent the occurrence of electrical fires. This drop often occurs at the end of a very long run of cable, for example. Finally, for RV and boat applications, people try to conserve battery power to the best of their ability.
It is therefore important to remember that higher amps burn more battery power. High amps is not always a good thing because the wires and devices need to be very big.
To get away from having big wires, increasing the voltage will decrease the amperage for the same amount of power.
0コメント