Comparison Marshall Kilburn vs Harman Kardon Esquire Mini

— Mono. The simplest type of acoustics is a single-channel audio system equipped with one speaker. Of course, there is no question of any volume of sound.

— Stereo. Acoustic system equipped with two speakers responsible for the left and right channels. Allows you to create a minimal illusion of "surround" sound by simulating the displacement of the sound source in the space in front of the listener.

— 2.1. A system of two stereo speakers that create a minimal illusion of "surround" sound, and a subwoofer that provides powerful and rich sound at low and ultra-low frequencies.

The total power of all channels of the speaker system. The higher the power, the larger the size of the room in which the audio system can be used, however, more powerful portable speakers usually have larger dimensions and weight.

The range of audio frequencies reproduced by the audio system. The wider the range, the richer the sound, the more details the speakers can convey, especially in the low and high frequencies. At the same time, we note that the average human ear is able to hear sounds in the range of about 16 – 20,000 Hz, and it makes no sense to provide a wider range in speakers — a person simply will not hear it. Also note that a wide frequency range alone does not guarantee good sound quality.

— Speakerphone. The ability to use portable acoustics as a hands-free system for a mobile phone. In this mode, the acoustics are connected to the device via Bluetooth, and the voice of the subscriber at the other end of the line is output not to the phone speaker, but through the speakers of the acoustic system. This is often more comfortable than holding the phone to your ear; in addition, the speakerphone is useful if several people need to participate in a conversation.

— NFC. NFC is a short-range wireless communication technology (about 10 cm). It allows for many uses, but in portable acoustics it is usually used as an addition to Bluetooth, which makes it easier to set up a connection. For example, a smartphone with an NFC module can simply be brought to a speaker with the same function — and both devices will automatically recognize each other, while the user will only have to confirm the connection.

— Multipoint. A technology used in Bluetooth models that allows the speaker to connect to multiple devices at the same time. Thanks to this, you can, for example, listen to music from a laptop, and when a call is received on a mobile phone, switch the acoustics to a conversation. This technology has its own characteristics for different manufacturers, and therefore, if the multipoint function is critical for you, you should separately clarify the details of its operation in the selected...model.

— Synchronization of speakers. The model supports the ability to synchronize the operation of several speakers connected to one signal source. This solution allows you to realize truly stereo sound, improve the quality and power of sound reproduction, as well as expand the stereo panorama. The only thing is that both speakers must support the appropriate connection type. Different brands may have their own speaker interconnection technologies (JBL Connect, JBL PartyBoost, Sony Party Chain), or maybe a universal TWS.

— Mobile application. The ability to operate the functions and settings of portable acoustics through a mobile application for a smartphone or tablet. Communication between the device and gadgets is usually carried out via the Bluetooth wireless protocol. The proprietary software may provide tools for flexible sound settings (equalizer, bass boost, etc.), managing wireless connections, selecting a sound source, etc. Also, through a mobile application, it is often possible to update the firmware of portable acoustics.

— Vibrospeaker. A kind of portable acoustics that uses external objects as a sound emitter — tables, window panes, etc. In simple words: in order for such a column to sound, it must be fixed on another object. However not all of them require fixing on an external object — some practically do not differ from ordinary portable acoustics, and the “vibration” function is provided as an additional option in them.

— Light effects. Such effects can be different — from the simplest set of light bulbs flashing at a constant frequency to advanced colour and music systems that produce multi-coloured patterns in time with the music being played. Anyway, this function carries more entertainment meaning and does not affect the sound of the device.

— Mini-Jack output (3.5 mm). A connector designed to output an audio signal from a speaker system to another device — for example, a stationary audio system with a mini-Jack (3.5 mm) line input. Note that the signal level at this output is low, and it is impossible to connect passive acoustics directly to it — you need to use an amplifier.

— For headphones (miniJack 3.5 mm). A specialized headphone output, made in the 3.5 mm mini-Jack format — this is the standard used by the vast majority of modern "ears". Headphones can come in handy in a situation where loud sounds are undesirable (for example, in a living room at a later time) — or vice versa, in noisy environments where the sound from the speakers is simply not heard.

— Hours. A traditional clock is a device for displaying time. They are not a "vital" function for portable acoustics, but in some cases it is faster to look at the time on the speaker's dial than to look for another clock.

— Alarm clock. Classic alarm clock — a sound signal at a user-defined time, which can be used both for getting up and for other purposes. Must be combined with a watch (see above). The specificity of alarm clocks in portable acoustics is that they allow you to use a certain song or even a radio station as a signal.

- LCD display. Such a screen makes device management more intuitive: it can display the operating mode, equalizer settings, battery level, etc.

- Remote control. Portable sound system can be equipped with wireless remotes operating in the IR range. The advantages of such equipment are obvious: the system can be controlled from a distance, without the need to approach it every time.

- Handle / strap. The presence of a handle or strap makes wearing the speaker more comfortable. So the handle is used mainly in large stereo speakers and makes them look like boomboxes ( radio tape recorders) of yesteryear. The strap can be used both for large speakers and for miniature ones, which allows you to hang them on your hand, on elements of a backpack, etc.

- Flashlight. Such a function most likely will not replace a high-end specialized flashlight. The power of the built-in flashlight is usually enough to illuminate at least a distance of 2 - 3 meters, and models with a bike mount (see above) can even play the role of a headlight (although, again, they are inferior to specialized bicycle lights).

— Carabiner A latch-like device that allows you to attach the speaker to items of clothing, backpack straps, etc.

- Sucker. Such a device makes it possible to securely fix the column on a flat surface and easily remove it from there. Suction cups are often equipped with waterproof models that can even be used in bathtubs and showers.

- Bike mount. A special device designed to fix the column on a bicycle - usually on the handlebars, at the user's fingertips. Such models are often complemented by a speakerphone function that allows you to talk on the phone without taking your hands off the steering wheel.

- Battery powered. Powered by replaceable elements (in the form of batteries or accumulators), usually AA or AAA. This option makes the speakers more autonomous - and, unlike the built-in battery, sockets are not required for such models, the main thing is to have a supply of fresh batteries on hand. At the same time, the batteries themselves are usually not included in the kit, they must be purchased separately; at the same time, the capacity of disposable batteries may turn out to be different (usually it depends on the price category), and elements in the form of batteries are expensive.

Theoretically, a higher capacity allows to achieve greater battery life, but in fact, the operating time also depends on the power consumption of acoustics — and it can be very different, depending on the characteristics and design features. So this parameter is secondary, and when choosing it is worth paying attention not so much to the battery capacity, but to the directly claimed operating time (see below).

Operating time of a portable audio system without connecting to an external power source (network or USB port, depending on the capabilities). Note that manufacturers tend to indicate battery life in their specifications under optimal conditions for energy saving: at low volume, without using additional functions, etc. Therefore, in fact, this indicator may be noticeably lower than the claimed one, and speakers with a long operating time will not sound at full volume for the specified hours.

The time it takes to charge a fully discharged device to 100% charge.

The presence of a standard connector for charging.

- microUSB. One of the miniature versions of the USB connector, still popular in portable gadgets, despite the emergence of a more advanced USB-C. It has relatively modest capabilities (in particular, it is inferior to USB-C in terms of the maximum possible charging power), but this moment is rarely critical. At the same time, there are a great many cables and chargers for microUSB.

— USB-C. A relatively new type of USB connector, actively gaining momentum. Like microUSB, it is small in size, but has a more convenient reversible design and advanced features, such as the ability to transmit higher power, which has a positive effect on charging time.