The DEFENDER Freemotion B571 wireless headphones are compared with several alternative models from the same brand: DEFENDER Freemotion B651, DEFENDER FreeMotion B400, DEFENDER FREEMOTION B571 LED, DEFENDER EEMOTION B645, and DEFENDER EEmotion B690. All of these devices are designed for universal everyday use, support wireless connectivity with wired connection options via AUX and USB-C, and share the same fundamental frequency response range of 20–20000 Hz. The differences between them lie in driver sensitivity, ear-cup design, presence of backlighting, and battery operating time.
⚙️ The table below compares the key characteristics of the models, including design type, acoustic enclosure, sensitivity, connection interfaces, and additional visual elements.
| Parameter | DEFENDER Freemotion B571 | DEFENDER Freemotion B651 | DEFENDER FreeMotion B400 | DEFENDER FREEMOTION B571 LED | DEFENDER EEMOTION B645 | DEFENDER EEmotion B690 | Practical significance |
|---|
| Design type | Over-ear | Supraaural | Supraaural | Supraaural | Over-ear | Over-ear | Over-ear models fully enclose the ear to provide better passive sound isolation, whereas supraaural models rest directly on the ear. |
| Sensitivity | 115 dB | 105 dB | 118 dB | 20–20000 Hz | 105 dB | 118 dB | Models with higher sensitivity (B571, B400, B690) can deliver higher volume levels from the same source power. |
| Backlight | LED | None | LED | LED | None | None | The presence of LED backlighting gives the headphones a distinctive appearance during use. |
| Operating time | Not specified | Not specified | Not specified | 6–8 hours | Not specified | Not specified | Determines how long the device can operate wirelessly before needing a recharge. |
◎ The table below shows which model is best suited for specific use cases based on your preferences for comfort, sound sensitivity, and visual style.
| Use case | Recommended product | Why |
|---|
| Listening to music at higher volumes | DEFENDER FreeMotion B400 | Features a higher sensitivity rating of 118 dB for a louder and more pronounced audio output. |
| Daily commuting and multimedia | DEFENDER Freemotion B571 | Combines a universal frequency range, comfortable over-ear design, and stylish lighting accents. |
| Standard listening without extra light effects | DEFENDER Freemotion B651 | Provides a core feature set with a clean, classic design and no backlighting. |
The DEFENDER Freemotion B571 differs from alternatives through its over-ear format and LED lighting accents while maintaining the product line's standard frequency response. It is best suited for users looking for universal everyday multimedia headphones with a comfortable fit and distinct style, whereas alternative models may offer different sensitivity specifications or lack backlighting entirely.
