Very close. The upper limit of Class B is  dB, while the lower threshold of Class A is  dB. HIGHKA’s 29.4 dB is only 0.6 dB below the Class A threshold — within measurement uncertainty, it is closer to Class A than any other Class B acoustic pod. In terms of real‑world performance, HIGHKA achieves 39.3 dB at 2,000 Hz and 41.1 dB at 4,000 Hz — both exceeding Class A thresholds at these critical speech frequencies — delivering functional Class‑A‑level performance across the most important speech intelligibility range.