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FEATURES

Marantz has surpassed itself with the new PM-15S1 stereo integrated amplifier, which incorporates many of the design concepts of the PM-11S1 flagship model amplifier.

Amplifier

• HDAMSA2

As in the PM-11S1 model, the PM-15S1 also incorporates the HDAMSA2 as the main amp module. The HDAMSA2 in- cludes an input buffer, linear control volume and power buffer.

Power

• Power Transformers

Newly developed Toroidal power transformers are used in the PM-15S1 because they produce less vibration and magnetic leak than ordinary laminate design transformers. Vibration re- duction is achieved by using ring shaped core materials, while rigorous controls are maintained on the manufacturing pro- cess. Furthermore, the transformer periphery is covered with a ring core and short ring to reduce magnetic flux leak.

• Linear Control Volume

PM-15S1 inherits the Linear Control Volume system used in the PM-11S1, which offers smooth volume control of ±0.5dB steps in a range of 0dB - 100dB.

• Current Feedback Phono Equalizer

The Phono Equalizer, which has MM/MC type cartridge sup- port, also inherits the Current Feedback Phono Equalizer used in PM-11S1.

• Input Buffer

The input buffer is composed of the HDAMSA2 in the input section, which enables signals from the input source to be transmitted precisely to the linear control volume.

• Power Amplifier

Following closely in the footsteps of its predecessor, the PM- 11S1 is designed using a two-amplifier construction. By using a two-amplifier system, the power buffer uses high power to drive the speakers, therefore cutting the effects of Back EMF from the speakers.

• LC Ripple Filter

An LC Ripple Filter has been incorporated into the pre-amp power circuit, which provides “clean” power to the pre-amp section. “Clean” power is achieved by cutting out rectifier noise generated by the rectifier circuit, as well as external high fre- quency noise.

Functions

• Bi-Amp Mode

The complete bi-amp connection proposed by Marantz with the SC-7S1 and MA-9S1 reproduces a sound environment never before experienced. This same bi-amp connection has been made possible with the PM-15S1. Two PM-15S1s are connected by F.C.B.S. in a bi-amp mode that enables each to work as a monaural integrated amplifier.

• Floating Control Bus System

A Floating Control Bus System (FCBS) enables the user to connect up to four PM-15S1s, making possible a diversity of applications with complete bi-amp and multiple channel connections.(pg. 6, 7) Moreover, a ground loop is not formed between multiple connected PM-15S1s, therefore sound qual- ity is not adversely affected.

• Display

The PM-15S1 adopts an LCD to display input source and vol- ume level. Compared to other types of display panels, an LCD generates less drive noise and radiated noise, hence the ef- fect on sound quality is minimal.

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Marantz PM-15S1 manual Features, Amplifier, Power, Functions, HDAMSA2
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PM-15S1 specifications

The Marantz PM-15S1 is a high-performance integrated amplifier that stands as a testament to Marantz’s commitment to audio excellence. Known for its sophisticated design and robust capabilities, this model has garnered acclaim among audiophiles and casual listeners alike.

One of the standout features of the PM-15S1 is its high current capability, which ensures that it can drive a wide range of speakers with ease. This amplifier is designed with a unique power supply that incorporates a massive toroidal transformer and high-quality filtering capacitors. This configuration provides steady and clean power, allowing for dynamic sound reproduction without distortion, making the PM-15S1 suitable for various musical genres.

The heart of the PM-15S1 lies in its advanced amplification technology. It employs a fully discrete current feedback circuit that has been meticulously crafted to deliver a natural and transparent sound. This circuit configuration minimizes signal degradation, allowing for precise audio playback that is faithful to the original recording. Additionally, the amplifier features a high-speed, high-current output stage that enhances its performance, particularly in reproducing intricate musical passages.

One significant characteristic of the PM-15S1 is its versatility. Equipped with multiple input options, including balanced XLR and unbalanced RCA connectors, users can easily integrate various audio sources. The amplifier also features a built-in phono stage, accommodating both moving magnet and moving coil cartridges, which is a boon for vinyl enthusiasts.

The construction of the PM-15S1 reflects Marantz’s dedication to quality. The amplifier is housed in a meticulously crafted chassis that reduces vibration and interference, ensuring that the audio signal remains pure. Its elegant design, complemented by luxurious finishes, makes it an attractive addition to any audio setup.

Another essential aspect of the PM-15S1 is its user-friendly interface. The front panel includes intuitive controls for volume, balance, and source selection, allowing for a straightforward user experience.

In conclusion, the Marantz PM-15S1 integrated amplifier is a remarkable piece of audio engineering that combines cutting-edge technologies with superior sound quality. Its robust features and sophisticated design make it a perfect choice for those who seek an enriching listening experience, whether it be for casual listening or critical sound reproduction.
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