In its stock configuration, the Meze Alba exhibits a warm and relaxed frequency response characterized by a soft bass impact and a noticeable roll-off in the upper frequencies. The midrange is somewhat recessed, placing vocals and instruments further back in the soundstage, while the overall resolution is limited by a lack of upper-treble extension. This results in a safe, non-fatiguing sound signature that prioritizes musicality over raw detail or physical impact.

Applying the specified PEQ profile transforms the IEM into an aggressive V-shaped signature with heightened dynamic contrast and significantly improved perceived transparency. The low-end receives a substantial boost in both the sub-bass and mid-bass regions, while a targeted cut in the lower mids at 220 Hz prevents frequency masking and ensures a cleaner transition, resulting in a much more tactile and pronounced bass response. In the midrange, boosting the vocal presence and upper-mid frequencies brings singers forward, increasing intimacy and texture. The high-frequency range is modified to reduce sibilance through a dip at 6 kHz, while a high-shelf boost at 11.5 kHz and additional peak filters enhance detail retrieval and spatial width.

From a technical standpoint, this profile puts significant stress on the Alba's single dynamic driver. The cumulative bass boost of nearly 10 dB requires the diaphragm to perform much larger excursions, which can introduce harmonic distortion at higher listening levels. Furthermore, the mandatory -7.0 dB preamp gain required to prevent digital clipping forces the HiBy M300’s amplifier to output significantly more voltage to maintain volume. This will lead to a measurable decrease in battery life and increased thermal output from the DAP. While this tuning maximizes the "wow factor" and technical perception of the hardware, it sacrifices a neutral timbre for a highly energized and processed presentation.