In-ear monitors with Planar Magnetic transducers are becoming increasingly popular with those who want to enjoy a faithful, detailed sound reproduction. This technology, long reserved for high-end headphones, is now becoming more widely available in more compact formats. But how do these transducers differ from orthodynamic models, and what criteria should be taken into consideration when choosing a pair of planar IEMs?
Specific transduction technology
Planar Magnetic transducers use a thin, flat diaphragm with electrical conductors running through it, placed between two powerful magnets. As the audio signal passes through these conductors, the diaphragm vibrates, producing the sound. This configuration provides an extended frequency response, low distortion and high precision. It also allows better spatial imaging and a more natural reproduction of instruments and vocals. Planar Magnetic IEMs are distinguished by their ability to reproduce every micro-detail precisely and their wide soundstage.
Which Planar Magnetic IEMs should you choose?
Here is a comparative table of four Planar Magnetic in-ear monitor models.
| FiiO FP3 | Campfire Audio Supermoon | Astell&Kern Zero 2 | Campfire Audio Astrolith | |
| Transducer | 14.5mm Planar Magnetic | 14mm Planar Magnetic | Hybrid: 1 Planar Magnetic + 4 balanced armature + 1 piezoelectric + 1 dynamic | 14.2mm + 6mm Planar Magnetic |
| Impedance | 36 Ω | 15.5 Ω | 5 Ω | 8.2 Ω |
| Sensitivity | 105 dB | 94 dB | 105 dB | 94 dB |
| Frequency response | 20Hz – 40kHz | 5Hz – 20kHz | 20Hz – 30kHz | 5Hz – 25kHz |
| Price | €89 | €1,090 | €1,209 | €2,190 |
Our expert's advice
To take full advantage of Planar Magnetic in-ear monitors, we recommend pairing them with a high-quality DAC or headphone amplifier. This will provide the power needed to ensure optimum sound reproduction. What's more, using high-resolution audio files can enhance the listening experience by bringing out the full potential of these transducers.
Summary
Planar Magnetic IEMs offer an interesting alternative to traditional models, especially for music lovers seeking a more precise and detailed sound reproduction. Although they require greater amplification power, their performance may be worth the investment for discerning users.
