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The ddHiFi Memory AL4.4 are in-ear monitors featuring planar magnetic drivers, designed to reproduce sound with precision and stability. They incorporate a driver developed in collaboration with Moondrop, featuring a dual suspension system and a four-pole magnetic circuit to better control the movement of the diaphragm, thereby improving sensitivity whilst minimising distortion.
They combine an aluminium alloy housing, whose rigidity minimises unwanted resonance, with a shielded cable that protects the signal from electromagnetic interference. This design ensures consistent sound reproduction, free from any colouration caused by the chassis or the signal transmission.
The Memory AL4.4 features a planar magnetic driver developed in collaboration with Moondrop, utilising a dual-suspension system for the diaphragm to stabilise its movement and minimise mechanical distortion under high stress. This design is complemented by a four-pole magnetic circuit, increasing the flux density applied to the diaphragm, which improves sensitivity whilst maintaining precise control over movement. The result is low non-linear distortion, preserving the clarity of subtle details at low volumes, whilst low harmonic distortion at high levels ensures stable reproduction even during prolonged listening sessions.


The system features an aluminium alloy chassis, whose structural rigidity minimises unwanted resonance, whilst the retro design forms part of an aesthetic approach that contrasts with a sound reproduction focused on contemporary precision. This consistency extends to the cabling, with a shielded cable that isolates the signal from electromagnetic interference, thereby preserving the integrity of the information transmitted to the drivers.
To ensure you can take them with you wherever you go, the Memory AL4.4 come with a synthetic leather carrying case designed to resemble a cassette player. The case features two separate internal compartments to prevent the metal earpieces from scratching each other.

Technical characteristics
| Specifications | |
|---|---|
| Product type | In-ear monitors (IEM) |
| Driver | Planar magnetic 13mm |
| Cable connector | Jack 4.4mm |
| Frequency response | 20Hz-20kHz |
| Impedance | 16Ω |
| Sensitivity | 121dB |
| Total harmonic distortion (THD) | ≤0.1% |
| Body material | Aluminum |
| Cable conductor | 5N OCC copper |
| Cable length | 1.2m |
| General | |
|---|---|
| Weight | 25g |
| Color | Silver |
| Package | 1x ddHiFi Memory AL4.4 1x Carrying case 3x Pairs of ear tips (S / M / L) |
| Color | Silver |
| Impedance (Ω) | 16 |
| Efficiency / Sensitivity (dB) | 121.0 |
| Wireless | No |
| Cable termination | Jack 4.4mm |
| Headphone / Earphone connector | NC |
| Phone call feature | No |
| Noise reduction | No |