Foreword: Just found this lying around. 1BA + 1DD hybrid, made cheap for the masses. Frequency Response CSD Impulse THD Impedance Analysis Dark sounding signature. Enhanced bass with shelved treble. Channel matching, to no one's surprise, is... not optimal. Quite muddy sounding with blunted notes. THD is average, but free of anomalies. Impedance is more-or-less flat. Should not change with OI. Overall, average. Can't really say much about it, neither praise nor critique based on the pricing.