Rockford Fosgate PUNCH 4020 DSM manual XCard Internal Crossover, RTP Real Time Protection

◆XCard (Internal Crossover)

The Punch 4020 amplifier utilizes internal active crossovers. These crossovers have many performance advantages such as using dis- crete components for exact frequency adjustments which are far superior to potentiometers. Additionally, the XCard can be config- ured for high-pass, low-pass and full range operation. With slight modification, many crossover frequencies and slope configurations can be achieved.

THE RESULT: Increased system design flexibility with a precise electronic crossover without the limitations of conventional poten- tiometer designs.

◆RTP (Real Time Protection)

NOMAD (NOn-Multiplying Advanced Decision)

The Punch 4020 amplifier uses an analog computer process to absolutely maximize safe output power under all operating condi- tions. Rockford Fosgate pioneered and developed RTP (Real Time Protection), a crucial element in the performance edge of our amplifiers. The innovative NOMAD (NOn-Multiplying Advanced Decision) system is the most sophisticated version of this technique ever used, bringing previously unavailable levels of accuracy, stability, temperature immunity and reliability to this critical pro- cess. NOMAD makes advanced decisions based on device voltages to precisely control the awesome levels of current available in the output MOSFETs to safe values – but only when absolutely needed.

THE RESULT: Extremely fast protection system that always protects the amplifier and never degrades the sound.

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