Amp Amplifier
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Getting An Efficient Music Amp
When you are ready to acquire new power t-amp models, you may be asking yourself how efficiently your amp performs. Let me demonstrate exactly what the expression "power efficiency" stands for and why you must take a closer look at this figure in your selection of brand new power amplifier.
The less efficient your amp is, the more power will be squandered which results in many difficulties: A great deal of squandered energy clearly implies greater operating cost which means that a more expensive amp can in fact in the long term end up being less costly than a less costly type which has lower efficiency. Lower efficiency amps are going to dissipate a whole lot of power as heat. Amps that have low efficiency typically have a number of heat sinks in order to help radiate the wasted energy. Heat sinks and fans need room and are expensive. The amp thus will become rather large and expensive. Furthermore heat fans will generate operating noise. Amps with low efficiency can't be put into small spaces or inside sealed enclosures as they need a great deal of circulation.
Low-efficiency models consume more overall power to output the same level of audio power as high-efficiency products. Consequently they need a bigger power supply which makes the amplifier costlier to build. An increased level of heat causes extra stress on elements. The life expectancy of the amp can be reduced and reliability might be jeopardized. High-efficiency amplifiers in contrast do not experience these issues and can be constructed small.
When shopping for an amp, you will find the efficiency in the data sheet. This figure is frequently shown as a percentage. Class-A amplifiers are among the least efficient and offer a power efficiency of approximately 25% only. In comparison, switching amplifiers, also called "Class-D" amplifiers offer efficiencies as high as 98%. Getting an amplifier with an efficiency of 90% for example shows that 10% of the power that is used is squandered while 90% can be audio power.
Yet, there are several things to note about power efficiency. Firstly, this figure is dependent on the amount of power that the amp is delivering. Every audio amplifier will consume a specific amount of energy irrespective of whether or not it supplies any power to the speaker. For this reason the smaller the power the amplifier delivers, the smaller the efficiency. Because of this audio manufacturers generally specify the efficiency for the highest audio power that the amplifier can supply.
To be able to measure the power efficiency, usually a test tone of 1 kHz is fed into the amplifier and a power resistor attached to the amplifier output to imitate the loudspeaker load. Then the amplifier output signal is measured and the power level calculated that the amp delivers to the load which is subsequently divided by the total energy the amp consumes. Generally a complete power report is plotted in order to show the dependency of the efficiency on the output power. Due to this the output power is swept through different values. The efficiency at every value is tested plus a efficiency plot created.
While choosing an audio amp you have got to weigh efficiency versus fidelity considering low-efficiency analog amplifiers frequently offer the largest music fidelity while digital models will have greater distortion. A few more recent audio amp designs, for instance Class-T amps, can reduce music distortion to amounts near to those of analog music amplifiers and in addition are able to accomplish great signal-to-noise ratio. Choosing one of these amps will deliver high efficiency and at the same time high audio fidelity.
What is the best amplifier to choose for a Pioneer DVC 1200Watt amp?
What the specifications for the amp should be and the best one in terms of price and quality?
1200w max pio should be 300-400w rms.
If it's a dvc 4 you'd want a mono amp around 400w at 2 ohms:
more than enough power, but a great buy: http://www.sonicelectronix.com/item_17801_Eclipse+XA1200.html
http://www.sonicelectronix.com/item_18885_Orion+Cobalt+CO8001+-CO800.1-.html
http://www.sonicelectronix.com/item_11634_Pioneer+GM-D7400M.html
If it's a dual 2 you can go with either a bridged 2 channel that's around 400w at 4 ohms:
dirt cheap, actual power should be about right, but questionable quality: http://www.sonicelectronix.com/item_1008_Visonik+V217SX.html
fair: http://www.sonicelectronix.com/item_17498_Crunch+GPV+700.2+-GPV700.2-.html
good: http://www.sonicelectronix.com/item_16644_Pioneer+GM-5400T.html
or a mono that's around 400w at 1 ohm:
good: http://www.sonicelectronix.com/item_9343_MB+Quart+RAB+1450.html
good: http://www.sonicelectronix.com/item_13579_Polk+Audio+PA400.1+-PA+400.1-.html
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