As a long-time user of Pioneer Class D receivers, from the SC-09TX flagship to the latest SC-68, I’ve consistently been impressed. The new D3 design represents an exciting evolution, moving beyond Icepower with a chip amp design from International Rectifier, promising enhanced performance.
The D3 design distinguishes itself with simpler circuitry and eliminates the feedback loop needed in Icepower amps to maintain low distortion across frequencies. Furthermore, the switching frequency is dramatically increased to around 500 kHz, ten times higher than Icepower’s 50-60 kHz. This higher frequency in D3 moves it even further beyond the audible range, simplifying filtering and potentially leading to cleaner audio reproduction. In all Class D amplifiers, this switching frequency is addressed through sophisticated filtering, and the D3’s streamlined design offers an advantage over the complexity of Icepower in this aspect.
Both Icepower and D3 amps deliver exceptional sound quality, characterized by tight bass and the ability to handle wide dynamic swings. They provide consistent power across multiple channels, avoiding the power sagging seen in some receivers when driving multiple speakers simultaneously. This robust power delivery is crucial for demanding, low-efficiency speakers. Pioneer’s Class D amplifiers are very capable of powering even demanding low efficiency speakers, such as 85 db efficient Magnepans, and those with impedance lower than 8 ohms. Pioneer has officially rated their Class D amplifiers at 4 ohms starting from last year’s models, highlighting their robust design.
When comparing Pioneer receivers to brands like Denon, remember that differences in sound are often attributable to room correction systems (Pioneer’s MCACC vs. Denon’s Audyssey) rather than inherent amplifier technology. The room correction software plays a significant role in the final audio output, often overshadowing subtle differences in amplifier design.
In summary, Pioneer D3 amplifiers offer a significant step forward in Class D audio, combining technical innovation with exceptional sound. For those seeking high-performance home theater sound, experiencing Pioneer D3 is highly recommended. Explore expert reviews in publications like Home Theater Magazine for further validation.
