The Basic Elements You Need To Know When Buying A Speaker-Part 2

- May 13, 2020-

Buying high-quality professional audio and configuring them correctly in your performance venue will make your live mixing work much easier; in addition, it will provide a more pleasant listening experience for audiences and performers. The reproduction of live sound requires reliable performance and consistent coverage in the entire listening area, so the use of professional speakers is very necessary. In order to help you select professional speakers that meet your needs without causing heavy losses to your wallet, we have summarized some basic elements that you need to understand when you buy speakers, so that you can more clearly understand your needs Your best choice.

Terminology about speakers

Before you buy a speaker, you must first understand some terminology about the speaker, because it will help you narrow the scope of screening and make better decisions faster.

Drive unit. It can also be called a transducer, and the drive unit is the part where the sound box generates sound waves. The better the quality of the drive unit, the better the sound wave can be reproduced, and it can withstand the consumption of sound wave in the field environment. Two crossover speakers have two drive units: a high frequency and a low frequency. The three-way speaker has three driving units: a high frequency, an intermediate frequency and a low frequency.

Sound basin. The name comes from the shape of the diaphragm. The sound cones of most speakers are made of paper and composite materials. There are two parts inside and outside, which are usually responsible for low frequency reproduction. The inner wall assembly is called "elastic wave", which is attached near the bottom of the sound cone to better control the movement of the voice coil in the gap. The peripheral component is the frame of the cone, called the "basin stand", which can suspend the cone so that the diaphragm can move back and forth freely. Speakers are usually described by their cone diameter. For example, the PreSonus AIR10 10-inch two-way speaker means that the diameter of this speaker is 10 inches.

Voice coil. The voice coil is a coil attached to the bottom of the sound cone. When an electric current passes through the voice coil, the voice coil reacts to the magnetic field, thereby promoting the movement of the sound cone. Generally speaking, the larger the voice coil, the greater the intensity of exercise, resulting in a more compact bass response.

Compression unit. As its name describes, a compression unit moves sound into a smaller space, compressing it before it leaves the external space (usually an acoustic speaker). Like the cone, the compression unit is also expressed in terms of diameter. Larger compression units will have higher output.

horn. The horn is used to improve the overall efficiency of the drive unit. Mostly used for high-frequency replay, the usual configuration includes a compression unit, which makes a small metal diaphragm vibrate and sound through an electromagnet. The compression unit will then be attached to the bottom of the horn throat. Well-designed horns, such as the Pivot X110 horn used in PreSonus ULT-series speakers, can better control the high-frequency response of its coverage angle, thereby improving off-axis response.

Acoustic port. It can also be called a bass reflex port. The acoustic port redirects the inward pressure generated by the outward movement of the speaker. The backward movement of the diaphragm will push the sound wave out of the port and increase the overall sound level. The design of portable speakers will be more efficient, because this power will promote the generation of two sound waves instead of one.