Foreword: Periodic provided me a B-stock of their lineup for sampling, measuring and review. The Be is their current flagship at $300, making use of a Beryllium foil diaphragm as its name suggests. Frequency Response Scaled to manufacturer-provided graphs Impulse CSD THD Impedance Response Dead flat. No point posting a reactivity plot. Analysis V-shaped but not aggressively so. Warm-ish tone and excellent timbre. Channel matching is acceptable. Not amazing, but definitely within tolerance. Clean sound with little offensiveness. Low THD as expected of its driver. Satisfying amount of rumble in the subbass. Haven't heard this level of articulation in a while. Overall, a stellar performer. Does many things proper and little wrong.