ENGLISH

Appendix

Explanation terms

MM/MC cartridge select

There are two types--MM (Moving Magnet) and MC (Moving Coil)--of cartridges for turntable.

As the output levels for these two types of cartridges differ, the setting of the phono equalizer that is mounted in this unit must be switched according to the type of cartridge for your turntable. For switching, use the PHONO MC button on this unit.

Speaker impedance

This is an AC resistance value, indicated in Ω (Ohms). Greater power can be obtained when this value is smaller.

Protection circuit

This is a function to prevent damage to devices within the power supply when an abnormality such as an overload, excess voltage occurs or over temperature for any reason.

If a malfunction occurs in this unit, the power indicator blinks red and the unit switches to standby mode.

About the protection circuit

This unit is equipped with a protection circuit to protect the amplifier circuits and speaker system from damage.

If the protection circuit is activated, the sound is instantly muted.

In this case, the message “PROTECT” flashes on the display panel, and the STANDBY indicator also flashes.

To deactivate the protection circuit, turn the unit off then back on again after about 1 minute or more.

At power on

For about 8 seconds after the power is turned on, the protection circuit is activated, muting the sound to give the amplifier circuits time to stabilize. Once the amplifier circuits stabilize, the protection circuit is released, and audio is enabled.

In the event of overcurrent

The protection circuit is activated if current exceeding a certain level is detected, which can happen if excessive signal flow is input to the amplifier or if the unit is connected to a speaker system of less than 4 Ω/ohms impedance. The protection circuit is also activated if a speaker cable shorts.

In such cases, the message “PROTECT” flashes on the display, and the volume is automatically reduced. After approximately 8 seconds, the protection circuit is released. Therefore, the volume needs readjusting to continue normal use.

If the overcurrent continues, the amplifier shuts itself OFF, and the STANDBY indicator flashes.

To deactivate the protection circuit, turn the unit off then back on again after about 1 minute or more.

If the main-amplifier overheats

The protection circuit is activated if the temperature of the main amplifier section rises above a certain level, which can happen if the amplifier is continuously used with excessive signal flow being input to it. The protection circuit is also activated when

the specified operating temperature is exceeded,

which

can

happen if the vents on top of the amplifier are

covered

or if

the amplifier is installed on a cramped

audio

rack. In

such

a case, the STANDBY indicator flashes,

and the

volume is

automatically reduced. After approximately 8 seconds, the protection circuit is released. Therefore, the volume needs readjusting to continue normal use.

If the temperature does not sufficiently fall within a certain amount of time after the protection circuit activation, the amplifier shuts itself OFF, and the STANDBY indicator flashes. To deactivate the protection circuit, turn the unit off, let it stand until it cools down, then turn it ON again.

In the event of amplifier trouble

The protection circuit is activated, and the power is automatically shut OFF, if an abnormality is detected in the power circuit. The same happens if the main fuse inside the amplifier blows. In such cases, the STANDBY indicator flashes.

Turn the unit off then after several minutes turn it on again. If the display does not light up, and the STANDBY indicator remains flashing after the unit is turned on again, the unit may be in failure.

If excessive ultrabass signals are input

The protection circuit is also activated if ultrabass signals are input. In such a case, the STANDBY indicator flashes, and the volume is automatically reduced. After approximately 8 seconds, the protection circuit is released. Therefore, the volume needs readjusting to continue normal use. If excessive ultrabass signal input continues or if DC voltage is detected owing to trouble with the amplifier, the amplifier shuts itself OFF, and the STANDBY indicator flashes.

To deactivate the protection circuit, turn the unit off then back on again after about 1 minute or more.

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Marantz PM-14S1 owner manual Appendix, Explanation terms, About the protection circuit
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PM-14S1 specifications

The Marantz PM-14S1 is a high-performance integrated amplifier that exemplifies the brand’s commitment to audio quality and innovation. Combining excellent build quality with advanced technologies, this amplifier has gained a loyal following among audiophiles and music enthusiasts alike.

At the heart of the PM-14S1 is its dual-mono configuration, which effectively isolates left and right channels to minimize crosstalk and distortion. This design feature ensures that audio signals maintain their integrity throughout the amplification process, delivering a pure and immersive listening experience. The amplifier boasts a robust power output, with a rating of 70 watts per channel into 8 ohms, making it capable of driving a wide range of speakers with ease.

One of the key technologies integrated into the PM-14S1 is Marantz’s HDAM (Hyper Dynamic Amplifier Module), which is designed to replace traditional op-amps with discrete components. This innovative approach enhances the amplifier's dynamic range and overall audio fidelity while reducing noise and distortion. As a result, listeners can enjoy a more natural soundstage and richer musical details.

The PM-14S1 also features a high-quality phono stage, compatible with both moving magnet and moving coil cartridges. This built-in phono preamp allows vinyl enthusiasts to connect their turntables directly to the amplifier, ensuring that the warmth and character of analog recordings are preserved. Additionally, the amplifier supports a variety of input options, including multiple line-level inputs and a balanced XLR input, enhancing versatility for various audio sources.

Marantz has engineered the PM-14S1 with a thoughtful focus on user experience. The elegant design, complete with a premium aluminum front panel, gives it a sophisticated aesthetic that matches its performance pedigree. The amplifier is also equipped with a simple and intuitive user interface, making it easy to navigate settings and select inputs.

Overall, the Marantz PM-14S1 stands out as a powerful and versatile integrated amplifier, offering exceptional sound quality and advanced technology in a stylish package. With its combination of dual-mono architecture, HDAM technology, and user-friendly features, it meets the needs of discerning audiophiles and casual listeners alike, making it a noteworthy addition to any high-fidelity audio system. Whether enjoying vinyl records or digital sources, the PM-14S1 delivers a rewarding and engaging musical experience.
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