DNM 3C PRIMUS preamplifier + PA3 Delta Power amplifier. The DNM Primus preamplifier is based on the same chassis as the more expensive models. The materials technology advantages are therefore fully expressed in the Primus making it extraordinary value for money. The boards are fitted with more cost-effective components. Despite its lower price, the Primus is still 100% DNM. The Primus power supply features a smaller non-acrylic plastic case with a single pair of regulators being supplied by a pair of 1,100µF slit foil reservoir capacitors. Even with the basic power supply, the DNM 3C Primus package gives outstanding sonic results. Read the Stereophile review of the 3C Primus The 40 watt PA3Delta stereo power amplifier is a major departure from a conventional power amp design. A direct replacement for the classic DNM PA1, the PA3 tackles important new design issues that relate to sonic differences between the famous categories of power amplifiers-Valve, Transistor, Single Ended, Push-Pull, Bipolar, FET. DNM worked hard to understand and control these new design parameters because the potential rewards are great, for example-- a class AB transistor design that can outperform a single ended triode or a class A transistor amplifier. This new DNM power amplifier design gives more power, higher sound quality, cooler running with increased reliability and much longer operating life--all important factors for customers who want the best sound and practical hi-fi at home. To achieve this the PA3 uses an all-new three-dimensional circuit with ultra-tight control of its feedback surrounded by new magnetically neutral materials technology to improve dynamics and reduce the sonic signature of the amplifier's structure. This is a significant advance on conventional amplifier designs, which use flat printed circuit boards with circuits that must be tortuously routed in two-dimensions, that ignore the adverse effects of circuit generated magnetic fields and their reaction with the metal in the structure. Mains power is supplied by a separate Primus-sized power supply box, which contains the mains transformer, fuses and switches, keeping the sound-damaging AC mains effects away from the signal circuitry.