Marantz HDAM moduli

What Hyper Dynamic Amplifier Modules Do for Your Home Audio


The circuitry and craftsmanship that go into a home theater receiver make all the difference in the sound quality it produces. With the right technology on your side, you can enjoy a deep, immersive experience that captures every nuance of your favorite movies and music. The Hyper Dynamic Amplifier Modules (HDAMs) incorporated into Marantz Hi-Fi components contribute to the superior performance of Marantz technology, setting these products apart for decades.

Stepping up from integrated-circuit operational amplifiers

A standard integrated-circuit operational amplifier (IC op-amp) is a commonly used method to increase output. These types of amplifiers are versatile, reliable and inexpensive, but they also have serious limitations. Noise and a low slew rate — a measure of the rate of change in current over time — can greatly detract from the resulting sound quality, especially at higher frequencies.

To combat this, in 1992 Marantz debuted a unique type of circuit board to take the place of the customary IC op-amps. HDAMs are preamplifier modules, situated between the volume control and power amplifier sections, that perform the same function as the more conventional circuits. However, a few key upgrades within HDAM technology provide a noticeably enhanced level of performance.

The discrete surface mount components are placed in a single module with short, mirrored circuit paths to amplify and buffer line-level signals. This results in lower noise and an improved slew rate for richer, more dynamic sound that accurately reproduces slight high-frequency details.

Taking full advantage of HDAMs

Marantz has developed several variations of HDAM circuitry. These versions are suited to many different products, ranging from AV receivers to CD and digital media players like the ND8006 digital music source player. With the right setup, you can make the most of this innovative approach to amplification.

If you want to maximize the performance and precision of your home theater setup, the AV8805 pre-amplifier is an excellent way to start. The pre-amp features Marantz proprietary HDAM and current feedback technology, providing a low phase shift that improves through-rate, transient response and overall sound across the bandwidth. Moreover, the model represents a major leap forward with its 13.2 channel processing and 3D audio capabilities.

HDAMs are just one way that Marantz continues to distinguish its achievements in sound. Explore the wide range of AV receivers and other Hi-Fi components to create the perfect audio setup for your home.