The E2101C is a new compact in-ceiling loudspeaker from Eliek Acoustic. Eliek Acoustic has also been published in previous issues of our magazine. Eliek Acoustic is a brand of Matrix Audio Design, and the overall direction is custom installation audio, mainly for users who need custom installation of home theaters, backgrounds, and whole-house audio, so the design must be able to meet the needs of users with different installation needs, from outward, wall-mounted to embedded. The ELIEK Acoustic E2101C ceiling speaker in front of you has a front panel diameter of only 11cm and a driver unit with a diameter of 2With a depth of only 65mm, it is the smallest and lightest in-ceiling speaker in Eliek Acoustic's products, equivalent to the size of a downlightBackground*** use;Second, the sky channel inside the Atmos home theater;Third, you can set up a living room theater. When communicating with the manufacturer, the manufacturer also indicated that there were already customers using the E2101C to sing karaoke. A special in-ceiling speakerEliek Acoustic E2101C ceiling speaker used 2The 5-inch cone driver is a full-range driver that does not have any crossovers in it and is driven directly by the amplifier. This 2Although the 5-inch full-range unit is small, it is very well-made. First of all, in order to maximize sensitivity, the magnet part of the magnet uses the strong magnetic NdFeB. Not only that, but the magnet part is also divided into main and secondary magnets. Among them, the secondary magnet part can further strengthen the magnetic field strength, which can make the bass part sound thicker. The basin frame part of the unit is made in a one-piece way, because there is no connecting surface in the one-piece molding, and it can also reduce some unnecessary vibration. In addition, a short circuit ring is installed inside to reduce distortion, which also smooths the impedance of the speaker and makes it easier to drive. As for the diaphragm that drives the air, it uses mica PP basin, and there is a special damping agent on the surface, which can play a role in reducing the vibration of the division. On the enclosure of the speaker, I see several parameters, which are impedance, carrying power range, and nominal frequency response. Among them, the nominal frequency response is 90Hz 20kHz. I tested the full-range unit in a near-field manner using the RAW software and the test microphone. When this unit is installed on the baffle measurement, the low frequency is about 200Hz as the turning point, and the flat attenuation begins below 200Hz. But if you turn the E2101C over, you will find that there is also a soft part on its back, and when the front unit makes a sound, you will observe that this soft part is also vibrating. In fact, this soft component is the passive radiator. The E2101C uses this passive radiator to extend the low frequency extension, which is the first time I have seen such a design in a ceiling speaker. 
On the back of the E2101C is a passive radiator through which the E2101C extends its low-frequency response.
Lightweight and compact, it is extremely easy to installDue to its compact size and lightness, the ELIEK Acoustic E2101C can easily be installed by one person, so to speak, by the user himself. It's also very easy to install, you just need to put the speaker into the reserved hole, and then use a screwdriver to adjust the two screws on the front panel separately, and the distance between the two clamps of the speaker and the panel will be shortened until the speaker can be installed very securely in the hole. The shell material of ELIEK Acoustic E2101C is made of lightweight aluminum, and there is a layer of spraying process on the metal surface, and the two speaker terminals are terminals with built-in springs, the advantage of this kind of terminal is that it is easy and quick to use, as long as the terminal is pressed down by hand, etc. Due to the metal nature of the housing and the coating process, although I measured the housing of the Eliek Acoustic E2101C with a universal meter, the readings showed no electrical conductivity. However, the manufacturer still puts a transparent sticker on the surface of the housing near the terminal to isolate the wire end from the housing, so as to reduce the risk of short circuit. 
The grille cover of the speaker is fixed by magnetic suction method, which is easy to install, and the style of the grille cover can be selected according to the user's preferences, and a total of four styles of grille cover are currently provided.
Listen to books, listen to the radio, the effect is superbI have the Xi of listening to books and radio at home, and I once had an audiophile tell me that listening to books and listening to the radio works well with full-range speakers. I agree with this statement, because I have my own radio with network streaming** and Bluetooth, and the radio is a full-range unit. Sometimes when I am alone in the bedroom in the dead of night, I turn on the radio to listen to the Internet radio or listen to a book, although the effect is not hifi, but it is very comfortable to hear. The Eliek Acoustic E2101C is essentially a full-range speaker, and it's small and lightweight, so I take it home to listen to books and listen to Internet radio stations. I once used the ELIEK ACOUSTIC E2101C single-ended 300B bile machine, and I also tried to use the panel amplifier of the background ** system to connect to the E2101C, the voice effect when listening to the book is very good, the midrange of the E2101C is very clear, exquisite, and has a trace of warmth, very comfortable to hear. And listening in a stereo configuration is much better than listening to a single speaker, with positioning and clear vocal focus. For example, Classic FM is the Internet radio station I often listen to, and Apple Music also has such a radio station, and the sound quality is better. The ** I clicked** are all played with a few simple instruments, or even a single instrument**, listening to the performance of the harp, the middle and high frequencies of the E2101C are crisp, the grain is distinct, listening to the performance of the cello, such a small speaker can not imagine that there is also a bit of a strong feeling. In addition to listening to Internet radio stations, I also have an Onkyo T-4711 radio capsule for listening to FM radio. Although the sound clarity is not as clear as the sound quality of the Internet ** radio, it is more pleasing in terms of hearing, and the sound of the E2101C at this time is more charming, the midrange is thicker and fuller, and in terms of pleasing to the ear, I prefer this sound.
Summary. Eliek Acoustic E2101C is an in-ceiling speaker that is not only small and lightweight, but also easy to install, and it also takes care of some details. The sound quality of E2101C is also quite good, the sound of the full-range unit reproduced is clear and exquisite, and from the sense of hearing, the sound of E2101C is also a sound that pleases the ear, which is very suitable for listening to books, listening to streaming radio stations, radio stations and other audio programs, used as a background system, E2101C combines the two aspects of ** and sound, and the cost performance is very outstanding. In addition, Eliek Acoustic is also about to launch an active subwoofer with an 8-inch woofer with the E2101C for full range**, so I'm looking forward to this complete set.