Marantz PM7004 Stereo Amplifier
Marantz PM7004 Stereo Amplifier
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Overview
Specifications
This full discrete current feedback integrated amplifier is perfect for audiophiles wanting both excellent music quality and flexible operation. It offers a powerful 2x 70W into 8 ohms, while the symmetrical circuits ensure perfect image balancing. To guarantee best sound quality the PM7004 includes high-grade audio components, current feedback HDAMs, and a high-speed instantaneous current supply. Also included is a highly useful new Tri-Tone Control system – this enables you to adjust not only Bass and Treble, but also the Mids. It is perfect for optimising the sound quality of compressed files such as MP3, by providing much finer adaptation steps. It is also useful to partly correct your room acoustics. All this is possible, but of course you can simply use the PM7004 in source-direct mode for the purest audio signal and enjoy your vinyls via Phono (MM) input.
Current Feedback
Current Feedback amplification is a well known, Marantz’ original circuit technology. The Current Feedback amplifier technology fits perfectly with the high requirements set for Super Audio software providing wide-bandwidth, high-speed reproduction. The impedance at the Current Feedback point is limited resulting in a very low phase shift. Marantz receivers and amplifiers equipped with Current Feedback can keep the phase compensation via Negative FeedBack (NFB) to a minimum, resulting in high through-rate, excellent transient response and superb sonic transparency for the full bandwidth. Unlike conventional Voltage Feedback amplification, the Current Feedback amplification makes the power amplifier in-sensitive to difficult loudspeaker loads.
Customized Components
On paper an electrical component might look excellent but the result may fall short of the combined design expectations. Marantz selects the appropriate components for the specific design application. In some cases it’s simply not possible to use standard components that meet the high Marantz standards. These components will then be specially made for Marantz in close cooperation with the Marantz engineers.
HDAM SA3
Marantz developed its own discrete circuit boards to replace standard IC's. These HDAM's consists of discrete surface mount components with short mirror image L/R signal paths. Those devices are doing exactly the same thing as the Op-Amps, but outperform the regular IC Op-amps dramatically in terms of the Slew Rate and reduced noise level, resulting in a much more dynamic, accurate and detailed sound. Over the years Marantz developed different types of the HDAM to improve quality and to fit to the special requirements of a product category like CD or amplifier.
Power Amp Direct
Power Amp Direct extends the flexibility of an integrated amplifier for use within a stereo set or as a power amplifier within a multichannel set up. With Power Amp Direct switched off, it acts as a normal integrated amplifier for enjoying perfect sound quality in a stereo set up. With Power Amp Direct switched on, it uses the power amplifier for driving the front left and right speakers within a multichannel set up, using the surround channels from your AV receiver. What’s more, it does all this with a single push of a button, without changing wires. The Power Amp Direct can also be used for a stereo bi-amping set up.
Shottky Diodes
A Shottky diode is a special type of diode with a very low forward-voltage drop compared to normal diodes. This lower voltage drop translates into higher system efficiency. Shottky diodes have very fast signal handling, can easily stay higher temperatures and are sensitive very low voltages.
Symmetrical Circuit Layout
To achieve the best possible sonic performance, signal paths need to be short, direct and mirror imaged. The construction of our circuitry provides improved stereo imaging by ensuring close to perfect symmetry between right and left channel layout.
Tri Tone Control
Marantz extended the sound tuning possibilities by introducing Tri-Tone-Control. In addition to Bass and Treble you can now also adjust the Mid Range. Especially for today’s compressed audio formats like MP3 and AAC this is a big advantage, as these often lack on sound quality.
| Interfaces | |
|---|---|
| Digital Audio Inputs | 6 |
| Headphone Output | 1 |
| Digital Audio Output | 2 |
| Phono Input | MM |
| Audio | |
| Frequency Response | 5Hz-100kHz (+-3dB) |
| Music | |
| iPod Support | Input for docking station |
| General | |
| Power Consumption | 200W |
| Dimensions | |
| Height | 440 |
| Width | 365 |
| Estimated Shipping Weight (KG) | 13.5 |
| Depth | 127 |
| Other | |
| Features | • 2x 70 Watts (8 ohm) • Full discrete Current Feedback amplifier technology • Tri-Tone Control (Bass/Mid/Treble) • Marantz Original HDAM-SA3 • Phono MM • Speaker A/B |
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