Lavalier microphone is a very useful and effective thing for situations where there is a need to shoot a video with a talking person in the frame. The reporter picks up a large microphone with the channel logo, and cannon microphones are used where it is impossible to record an interview in detail.
In all other cases, a lavalier mic comes to the rescue. He frees his hands, and placement on clothes looks invisible. Most models are wired, and this is often a problem. Whatever the length of the wire, it will not exceed a distance of several meters. This means that mobility and opportunities are declining. As an option, you can record sound from a wired microphone lavalier to a voice recorder, followed by synchronization during editing, but this is not very convenient. Therefore, the optimal solution would be a radio system. Each responsible blogger or film crew has or seeks to receive such a tool. BOYA BY-WM4 is considered one of the most affordable today, and the quality of the device is decent at the same time.
This system works in exactly the same way as all others of this type: the signal from the lavalier mic is fed through a short wire to the preamplifier-transmitter, which is mounted on the user’s belt (speaker) or simply placed in your pocket. A signal receiver mounted on the camera or connected to the recorder receives this signal and sends it to the recorder by wire. The BOYA BY-WM4 package includes everything necessary for a full-fledged operation, including a case, a condenser lavalier microphone with a clothes clip and foam rubber windproof, a transmitter, a receiver and two short wires with a 3.5 mm jack for connecting the receiver to a camera or smartphone.
One has two three-pin direct mini-jacks, the other has an L-shaped three-pin connector on one side and a 4-pin straight connector on the other (for smartphone). Also included is an adapter for mounting the receiver unit to the camcorder shoe. The regular belt clip is removable. The clips have a swivel design, and this is a great advantage. They allow you to fix the receiver or transmitter vertically and horizontally for convenience.
The receiver and transmitter have a simple design and compact format. These are black rectangles made of durable with power on toggle switches and level adjustment keys (on the transmitter it is the microphone volume control, and on the receiver the headphone output volume switch is installed). Each device has a pair of 3.5 mm jacks: the transmitter has a microphone input and a line input (for connecting external audio sources), and the receiver has an output for transmitting a signal to the camera and headphone output for monitoring. The transmitter and receiver are powered by one AA battery, the energy of which is enough for about three hours of continuous operation.
A tangible drawback of the system is the small operating range. The maximum operating range is about 25 meters in direct visibility, when premium devices show results up to 90-100 meters without visible obstacles. However, given the affordable price and the ability to get rid of wires, even such an indicator can be considered valuable.
The signal is transmitted at a frequency of 2.4 GHz using Gaussian frequency shift modulation (GFSK). In many ways, therefore, the claimed signal-to-noise ratio is only 76 dB, but the frequency range is 35-14000 Hz and it is more than enough for any work tasks. Recording quality would be acceptable anyway. At least there are simply no more or less decent analogues in this category.
In the first minutes after turning on the devices, periodic signal breaks occur with a break of 10-15 seconds. This is due to the long switching of the receiver and transmitter. That is, it is better to turn on the device in advance and prepare it for work.
In general, there were no problems with transmission stability, but there is a problem with a signal delay. That is, in the headphones I can hear a speech that is slightly noticeably behind the speaker speaking into the microphone. This circumstance limits the applicability of the device. BOYA BY-WM4 will not be useful in live broadcasts if the equipment does not allow you to enter a corrective shift for the video. Also, in other situations during installation it will be necessary to introduce a correction, but this is not difficult.
There is also difficulty in working near sources of third-party sounds when the microphone captures everything around the sound. However, this is quite typical for more expensive models, and the filter from the kit allows you to partially compensate for the problem.
To buy or not? Everything is very simple. The disadvantages of this system are noticeable, but they are fully offset by a very attractive price. You can come to terms with all the inconveniences if the user needs an extremely budget-friendly version of a wireless system with acceptable quality. BOYA BY-WM4 perfectly withstand active daily operation. Putting aside direct broadcasts, this is the best option for bloggers and all fans in general.
Characteristics and features
- Set of receiver, transmitter and lavalier microphone with accessories
- Affordable price
- 25 meters working range
- 48 working channels
- Receiver and transmitter powered by AA batteries up to 3 hours of continuous operation
- 35-14000 Hz frequency range