Hints For Purchasing Audio Amplifiers

Audio amplifier companies frequently present the frequency response of their solutions which, unfortunately, does not necessarily explain to you a great deal regarding the sound quality. I am going to shed light on the meaning of this term and additionally offer some recommendations on how to interpret it whilst searching for an amplifier.

An amp is only able to function within a particular frequency range. Any signals outside this range are going to be removed. From this specification it seems like the amp would be able to function as a HIFI amp. At the upper and lower cutoff frequencies the gain is going to drop by at most 3 decibels. Nevertheless, a lot of makers disregard this particular convention. They push the lower frequency and higher frequency to where the amplifier rarely has any gain. What’s more, these numbers say absolutely nothing about precisely how linear the amp is working inside this range. If possible you should really make an effort to obtain a frequency response chart from the producer. Additionally you can discover any peaks and also valleys the amp could have. You may also desire to request a phase response diagram that also offers crucial clues in regards to the quality of sound.

Generally contemporary digital or “Class-D” amps can have changes in the frequency response with different loads. The reason is the fact that Class-D audio amplifiers utilize switching FETs as the power phase which produce lots of switching components. These components are eliminated using a filter which is part of the amp. Normally the lower the speaker impedance the lower the maximum frequency of the amp. An additional method uses audio transformers between the power stage of the amplifier and several outputs. This method ensures that the amplifier will be loaded equally and in addition increases amplifier power efficiency.