Tips for Choosing AV Receiver: Amplifier Power
Amplifying is final step of several step of audio processing in AV receiver. AV Receiver receive audio video signal from input, process and decode it to several channels (depend of signal system source) and amplify it to audible/listenable signal via speakers. Amplifier manages how high audio signal will amplify or how far sound will be heard. This process should be perform accurately. So let?s know how to predict how much amplifier power we need.
Third, how much power we need.
How much amplifier power do you really need for your home theater or home entertainment setup? For the best performance, we recommend a minimum of 100 watts per channel (20-20,000 Hz, all channels driven). Power is the most skewed specification in home theater. For example, a manufacturer might give their receiver a two-channel-driven rating of 100 watts at 20-20,000 Hz. Their five-channel playback (all channels driven) rating might look similar but mean something very different: 100 watts at 1000 Hz, for example. Because its only given for one frequency, not the entire range, the second spec probably means there is a significant power drop off at the frequency extremes when all five channels are in use. The bottom line is when looking at power ratings, try to get a rating that covers the full audio spectrum, not just one frequency.
We recommend to take your time when evaluating receivers. I recommend that you pick 3 top contenders based on your budget, needs and personal tastes and spend extensive time listening and evaluating them. If possible bring them home for direct comparison in your personal listening environment. Be sure however that your retailer has a good return policy for full refund without restocking fees. Choosing a receiver is a matter of personal taste. However, there are many poorly designed products in the marketplace and it is the intent of this document to help you avoid buying one of these units. Use this as a guideline not a Biblical source when choosing the receiver that is right for your needs.
Good luck and happy listening.