Buying audio equipment can be daunting if you do not know your way. Who do you expect to trust? The salesman? Hell says everything you want to hear just for a part of the Commission.
Amps: Do you know what (amp) actually means for example? Everyone seems to think they know what that means, the phrase has been around for so long. Unfortunately, knowing about the true definition. There are three types of power in sound; peak power, RMS current and last but not least music strength. Then lets take it!
In consumer electronics, all specifications are measured, but when shopping for audio equipment, it is also a good idea to listen before buying. But in todays high-tech systems its a bit difficult to buy a bad system (if you do not go very cheaply) then I would not worry too much about it. The most common issue for poor output is connection (connection of cables or cables).
With this segment, we will be your guide to understanding all meaningless terms that usually confuse consumers when it comes to buying a good to excellent home theater system.
CHOOSE AN AMP!
A good amplifier should be heavy (not on the scale) but heavy in delivery. In other words, a high current amplifier is much better than one that is not! It generally gives a much stronger sound at a given power value and does not distort the sound until you reach a very high level. For example, a 500 watt high power amplifier is better than a 500 watt conventional power amplifier. I do not need to tell you that most all known manufacturers make high-end receivers or amplifiers.
WHAT IS REQUIREMENTS RATING?
How do you compare a peak, RMS and music (all in watts)? Lets start with RMS power, meaning Root Mean Square, and is the most conservative value. You understand when we explain further. The important thing is that RMS ratng is indicated on the equipment, as it means a quality manufacturer. I remember many years ago many of my friends and I bought Marantz because RMS (20 RMS per channel) was indicated and still an excellent amp. (It can also be called continuously
When comparing, what you are looking for is an 8 ohm reading or load. Do not buy anything less. If you see that a manufacturer cites only, in his specifications, maximum power only without RMS, be tired. Furthermore, if you see words like music strength, run away!
The peak force is double RMS. Peak Music Power Output (PMPO) is a term used by smart sellers when trying to sell you small watts speakers that can be made to sound like 100 watts speakers. Stay away from these types of speakers.
Remember, as I learned in the IT school, which volts X amps = watts. So how many watts of RMS you need per channel from your amplifier or receiver, depends on your speakers.
You want speakers that sound like they talk to you!
Speaker sensitivity is rated in DeciBel Sound Pressure Level (dB SPL), at 1 meter (3.3 ft) distance and at 1 watts current. In other words, the higher the number the higher the speaker. How to dictate the power you need from your amplifier for the correct listening level and pleasure. In fact, every time you double the watt, add 3 dB to the speaker.
Example: If you have a speaker rated to 90 dB sensitivity, and you feed it 2 watts, it will be 92 dB high. If you feed it 4 watts, it will be 94 dB high and so on at a distance of 3.3 ft. The factor in the speaker rop-off at 10 feet distance (about - 10 dB) and you can see why only 1 watts are very loud. As another example, a 250 watt home theater receiver will output approximately 101 dB and a 500 watt receiver will output approximately 104 dB.
Generally, it is a good idea to get an amplifier that is a little more powerful than the loudest speakers. Why? In order not enough power can cause loudspeakers to blow! In other words, you should have more power in your amplifier than you really need. If your speakers have a maximum value of 80 watts, your amp should be about 100 watts RMS per channel. But do not use much larger because you have the same effect to blow your speakers.
Now we have Hz (Hertz). Hertz is the frequency response. It is possible to replicate sounds at different frequencies. It is usually set as a minimum and a maximum value in Hz and usually with the +/- dB value.
You are now a professional to understand the sound function, and no salesman will ever be able to trick you when you buy audio equipment. Armed with this information, you can generally buy online without any problems as long as you read the specifications with the offer. All you need to do is keep in mind that the output from your RMS watt receiver or amplifier must be slightly stronger than your speakers can take, but not so much stronger!