AVP-A1HDCI Balanced Transmission Further Explored

By request, Denon sent me detailed block diagrams of these products that illustrate the fully balanced design. Most companies don’t follow a balanced convention through all of the circuit stages because it adds significant cost and complexity. The advantage of such designs ensures the very lowest distortion and noise floor which were very apparent when I put these units on the bench and conducted my measurements.

The AVP-A1HDCI utilizes two dedicated torroid and separate power supply banks with one being for the preamp output drivers and another being for the DAC sections. Digital audio and video circuitry are isolated on separate boards and are also fed independent post filtered isolated power to ensure the cleanest possible signal paths are maintained throughout the entire design.

AVP-A1HDCI & POA-A1HDCI Block Diagrams

The POA-A1HDCI 10 channel amplifier boasts 4 large E-core power transformers (2 for + rails and 2 for – rails) and 20 x 10,000uf capacitors (2 per channel) for a whopping 200,000 uf total power supply storage.  When bridging two channels, you are essentially coupling the power supply potential of each mono block amplifier and doubling the amplifiers voltage swing for a dynamic potential of up to 4 times the delivered power into that particular load.