Sensitivity
Sensitivity characterizes the loudness of the speakers when a signal of a certain power is applied to them. The higher this indicator, the higher the volume will be with the same characteristics of the signal source; simply put, on the same computer and the same volume settings, more sensitive speakers will play louder.
In general, an indicator of 85 dB is considered good, 90 dB and above is excellent. On the other hand, computer speakers rarely need a very high volume — they are usually located close to the user and are designed only for him. So in general, this parameter can be ignored.
Signal-to-noise ratio
The ratio of the level of the useful signal (actually reproduced sound) to the level of extraneous noise provided by the speaker amplifier in normal mode.
Any amplifier inevitably creates its own noise; You can't get rid of them, but you can reduce their level. The higher the signal-to-noise ratio, the clearer the sound will be, the less noticeable extraneous interference will be. In modern computer speakers, this figure can vary from 52 – 55 dB (the minimum figure so that the noise does not cause much discomfort) to 90 – 95 dB (comparable to fairly advanced Hi-Fi equipment). However, note that the signal-to-noise ratio is far from the only parameter that affects the sound quality, and its high value does not guarantee a pleasant sound from the speakers.
Frequency range
The range of audio frequencies supported by acoustics. The wider this range — the fuller the reproduced sound, the lower the likelihood that some of these details at low or high frequencies will remain “behind the scenes”. At the same time, the human ear is able to hear frequencies of the order of 16 – 22,000 Hz, and with age, this range narrows even more. In modern audio equipment, especially at the top level, there may be more extensive ranges, but from a practical point of view, this does not make much sense. In addition, it is worth noting that a wide frequency range in itself does not guarantee high-quality sound — a lot also depends on the frequency response.
Impedance
The electrical resistance of the speakers to alternating current. This parameter is important primarily for normal compatibility with the amplifier: too low speaker impedance can lead to distortion, overload, and even damage to the speakers, and too high impedance can reduce the sound volume. At the same time, the vast majority of modern computer acoustics have their own amplifiers and are connected via a line input. Therefore, the impedance data is more of a reference value; in fact, this indicator may be needed only when connecting speakers to a “non-native” power amplifier, bypassing the standard one.
Detachable cable
The presence
of detachable cables will save you from possible damage to the device associated with bending the wires. If such an incident occurs, an easy replacement of the wire with a new one allows you to continue using the speakers, and not carry them to a service centre. However, this solution is mainly used in higher-level models, which affects the cost. At the same time, not only audio cables can be removable, for which connectors are provided (according to the classics, this is RCA), but also the power cable.
Volume control
The location of the own volume control provided in the speakers. In modern computer speakers, there are regulators installed in the
front,
back,
side,
top,
on the signal cable, on the amplifier and on the remote control (the latter can be either the only regulator or in addition to the regulator with a different location; see below for details). Here are the features of each option:
— Front. The most popular arrangement nowadays: the front panel of the speaker is the easiest to reach, the regulator can be twisted at any time without any problems, and even if the speakers are tightly surrounded by foreign objects from the back and sides, the front panel usually remains free. Of the shortcomings, one can only note the moment that not everyone likes the extra handles on the front panel of the speaker — however, this is a purely aesthetic nuance that does not affect convenience.
— Behind. The knob mounted on the rear panel of the speaker is not very convenient for frequent volume changes — you usually have to find it by touch, and some free space around the speaker is required to access it. So on such speakers it is most convenient to initially select a certain optimal sound level, and then, if necessary, adjust the volume through the computer's software settings and not reach o
...ut to the regulator once again. Therefore, this option is quite rare. On the other hand, such invisibility has its advantages: acoustics acquires the most accurate appearance, without unnecessary small elements on the outside.
— Sideways. A kind of compromise between the two options described above: the regulator is not as noticeable as the front one, and at the same time it is easier to get to it than the rear one. However there should be enough free space on the corresponding side of the column for this, but this drawback is not particularly critical. So the lateral arrangement is found, although less often than the anterior one, but noticeably more often than the posterior one.
— Above. Pretty specific option. In terms of general specifics, it is similar to the side arrangement described above, however, for a number of reasons it is extremely rare — in speakers of non-standard design, as well as in some sets in which the system control is located on the subwoofer (this component is often installed on the floor, and the top position of the regulator is the most convenient).
— On the signal cable. A regulator placed directly on the wire carrying the audio signal. It is used mainly in inexpensive compact speakers: it is easier and cheaper to install a regulator in this way than to build it into a case, and the dimensions of the case itself can be reduced due to the absence of “extra” parts inside.
— On the amplifier. Option for models with external amplifier (see above). It is the parameters of the amplifier that determine the volume of the sound, so it is more logical to place the volume control on it, and not on one of the speakers. Theoretically, the specific location of the regulator can be different; in fact, this knob (like other controls) is usually mounted on the front panel. Note that such equipment is often supplemented by a regulator on the remote control (see below) — the amplifier is not always conveniently located, for frequent adjustments it is more convenient to use the remote control.
— On the remote control. The controller mounted on the remote control — this can be either a wired or wireless accessory (see "Remote control"). Actually, the presence of a remote control is almost guaranteed to mean the presence of a volume control in it, exceptions are extremely rare; and if there are two such consoles (wired and wireless), then the regulators are often installed in both. Also note that volume control from the remote control can be supplemented by a knob located in any of the places described above (except for the signal cable).
