The need for easy portability, and therefore low weight combined with high power, is now met with the new Outline DHD Series D4-3K power amps, with a completely switching output stage.
Chief distinguishing features are the flat frequency response irrespective of load impedance, nearly frequency-independent distortion behaviour and very low radiated and conducted EMI.
Compared to conventional linear amplifiers, the use of PWM (Pulse Width Modulation) conversion techniques enables unbeatable performance to be achieved as far as POWER DENSITY and EFFICIENCY are concerned. The results achieved enable the DHD Series amplifiers to be smaller and about a fifth of the weight of traditional amplifiers of the same power, thus greatly facilitating transport and reducing rack space required. Moreover, with standard music programs, the Outline DHD Series’ very high yield (over 90%) enables to reduce dissipated power to about 1/10 that of an equivalent linear amplifier.
The HF conversion circuit used in the Outline DHD Series amplifiers virtually simulates a purely resistive load carrying out power factor correction and ensuring almost total stabilization of the power voltage of the output stage, no matter what the mains voltage. This keeps the power amplifier’s performance unchanged, thus minimizing reactive power and harmonic distortion introduced on the current absorbed.