In the Neo 330A’s published specifications, Simaudio states that it operates in true class-A for the first 5W of its claimed power output, then shifts to class-AB. Other specs: The frequency response is 10Hz-125kHz, +0/-3dB, and the signal/noise ratio at full power is 100dB. Married to one of our Nēo power 350P amplifiers, the combination is a true step up from the integrated amplifiers, providing you with even more of everything: stunning musical realism, dynamics, harmonic richness and accuracy.