Andover Audio Introduces

EA-109

Planar Magnetic Headphones

MEET THE EA109 SERIES

Authentic Sound with Planar Diaphragm Driver

At the heart of our headphones lies a meticulously engineered planar magnetic driver. This advanced technology ensures unparalleled phase coherency and an ultra-fast transient response, reproducing music with breathtaking realism, accuracy, and detail.

EA-109 Planar Magnetic Headphones

The EA-109 represents a breakthrough in planar magnetic headphone design, engineered for the discerning audiophile. At its core is a large φ75mm planar diaphragm driver, setting a new standard for audio reproduction and performance.

A high-performance headphone with excellent technical capabilities

This chart displays the frequency response of the left (blue) and right (green) channels of the planar magnetic headphones, measuring sound pressure level (SPL) in decibels (dB) across the audible spectrum from 10 Hz to 40 kHz.

Impedance Characteristics

The impedance curve shows the headphone is very stable and easy to drive. Below 20 Hz there’s a big rise caused by the driver’s natural resonance, but since it’s below the audible range it doesn’t affect music. From bass through treble the impedance stays nearly flat at a few dozen ohms, with only a tiny rise at very high frequencies. This flat, resistive profile is typical of planar headphones and means they work consistently with most amplifiers.

Frequency Response Performance

Measured frequency response (SPL vs. frequency) for the left (blue) and right (green) channels of the headphone. The overall frequency response is reasonably balanced and extended, with each part of the spectrum showing specific tuning characteristics. Channel matching is excellent: the left and right traces overlap almost entirely across frequencies, indicating only minute level differences (on the order of 1–2 dB or less) at a few points. Such tight matching speaks to good quality control; it is crucial for stable stereo imaging and an accurate soundstage

Patented Vibration Suppression Technology

This patented, non-linear vibration suppression technology allows the driver to extend its frequency response, ensuring flawless sonic clarity.

Exclusive Dual-Magnetic Planar Technology

Acoustic Transparency: The magnets are engineered to be acoustically transparent, effectively "disappearing" before the sound waves. This design significantly reduces adverse effects and interference.

Unimpeded Sound Passage: The unique shape and density of the stealth magnets allow sound to pass directly through the structure, preserving audio fidelity without the degradation or reflections caused by conventional magnet designs.