Comparison LG SJ4 vs LG SJ3
Add to comparison |  |  |
|---|---|---|
| LG SJ4 | LG SJ3 | |
from $7.69 | Outdated Product | |
| User reviews | ||
| TOP sellers | ||
6 speakers. TV remote compatible. Adaptive ASC sound control. Auto Sound Engine. USB-A. | ||
| Audio format | 2.1 | 2.1 |
| Mount type | shelf / wall | shelf / wall |
Tech specs | ||
| Rated power | 300 W | 300 W |
| Soundbar speaker power | 100 W | 100 W |
| Impedance | 4 Ohm | |
Subwoofer | ||
| Wireless subwoofer |  | |
| Acoustic design | bass-reflex type | |
| Subwoofer power | 200 W | 200 W |
| Subwoofer dimensions (WxHxD) | 171x320x252 mm | 171x320x252 mm |
Interfaces | ||
| Interfaces | Bluetooth | Bluetooth |
| Audio decoders | DTS Dolby Digital | DTS Dolby Digital |
Connectors | ||
| Inputs | USB-A mini-Jack (3.5 mm) optical | USB-A mini-Jack (3.5 mm) optical |
| HDMI input | 1 pc | |
| HDMI output | 1 pc | |
Speakers | ||
| Number of speakers | 6 шт | 6 шт |
General | ||
| Control | remote control TV remote control from smartphone | remote control TV remote control from smartphone |
| Power consumption | 55 W | 27 W |
| Dimensions (WxHxD) | 890x55x89 mm | 950x71x47 mm |
| Projector weight | 2.47 kg | |
| Color | ||
| Added to E-Catalog | june 2017 | april 2017 |
Compare LG SJ4 and SJ3
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Glossary
Impedance
Impedance is the projector's resistance to alternating current, or more precisely, to the analog audio signal input from an external power amplifier. Actually, this parameter is of practical importance precisely if the device is planned to be used with an external amplifier. Ideally, the projector's impedance should match the impedance for which the amplifier is designed - otherwise, the volume may either decrease (if the impedance is too high), or distortion, overload, and even damage to the acoustics (if the impedance is too low) may occur.
Higher impedance is also thought to reduce the likelihood of interference. However, modern speakers (including sound projectors) have standard impedance values of 4, 6 or 8 ohms - the difference is not so great that the differences in sound quality are noticeable.
Higher impedance is also thought to reduce the likelihood of interference. However, modern speakers (including sound projectors) have standard impedance values of 4, 6 or 8 ohms - the difference is not so great that the differences in sound quality are noticeable.
Acoustic design
Acoustic design of the subwoofer used by the sound projector.
— Closed type. The simplest design option is a speaker installed in a closed case. Such subwoofers have a relatively low volume, but are distinguished by good sound fidelity and a minimum of distortion.
— Bass-reflex type. Subwoofers equipped with a phase inverter - a special tube connecting the inner volume of the case with the outer space. Such equipment improves the volume and saturation of the sound, but increases the likelihood of interference (primarily the rumble of air in the pipe).
— With a passive radiator. The passive radiator is actually a speaker without a coil and a magnet, installed in the subwoofer cabinet along with the main speaker. The purpose of such a radiator is similar to the phase inverter described above, except that it is less susceptible to interference.
— Closed type. The simplest design option is a speaker installed in a closed case. Such subwoofers have a relatively low volume, but are distinguished by good sound fidelity and a minimum of distortion.
— Bass-reflex type. Subwoofers equipped with a phase inverter - a special tube connecting the inner volume of the case with the outer space. Such equipment improves the volume and saturation of the sound, but increases the likelihood of interference (primarily the rumble of air in the pipe).
— With a passive radiator. The passive radiator is actually a speaker without a coil and a magnet, installed in the subwoofer cabinet along with the main speaker. The purpose of such a radiator is similar to the phase inverter described above, except that it is less susceptible to interference.
HDMI input
The number of HDMI inputs in the design of the sound projector.
HDMI is the most popular modern interface for working with HD content, it allows you to transmit high-definition video simultaneously with multi-channel audio over a single cable. Having multiple inputs allows you to keep multiple signal sources connected to the projector at the same time and select the source from the remote without fiddling with reconnecting wires.
HDMI is the most popular modern interface for working with HD content, it allows you to transmit high-definition video simultaneously with multi-channel audio over a single cable. Having multiple inputs allows you to keep multiple signal sources connected to the projector at the same time and select the source from the remote without fiddling with reconnecting wires.
HDMI output
The number of HDMI outputs in the design of the sound projector.
HDMI is the most popular modern interface for working with HD content, it allows you to transmit high-definition video simultaneously with multi-channel audio over a single cable. If you have multiple outputs, you can connect multiple signal receivers to the projector at the same time and switch between them from the remote control without touching the wires.
HDMI is the most popular modern interface for working with HD content, it allows you to transmit high-definition video simultaneously with multi-channel audio over a single cable. If you have multiple outputs, you can connect multiple signal receivers to the projector at the same time and switch between them from the remote control without touching the wires.
Power consumption
The total power consumption of the entire system, both the sound projector itself and the external subwoofer (if present). Usually this indicator is indicated by the average power consumption at maximum volume. Note that on individual signal jumps, the actual power consumption may exceed the claimed one; in some cases (for example, when connected through a voltage stabilizer), this must be taken into account.