Introduction

Lyngdorf SDA 2175 is a compact, high-performance analog switch-mode amplifier utilizing some of the circuit topologies originally developed for the Lyngdorf Millennium and M2150 amplifiers. Due to the switch-mode topology, with an efficiency of up to 85%, the SDA 2175 will provide its output power with minimal heat dissipation. A massive power supply with a 650VA toroidal transformer and more than 40000 microF capacitors ensures that the SDA 2175 can deliver the current to drive even the most demanding loudspeakers. The SDA 2175 has 2 gold-plated XLR connectors accepting balanced input signals and 2 gold-plated phono connectors for unbalanced signals. The input signal is fed to the power amplifier circuit via an AC-coupled true instrumentation type input amplifier. Except for the input amplifier, the SDA 2175 is fully DC coupled with no bypass capacitors or DC servos to degrade performance. The protection circuitry in the SDA 2175 shuts down the unit in case of over-temperature, DC voltage on the outputs and too high output current. The amplifier will resume normal operation when the fault condition is no longer present. A trigger input and bypass on 3.5 mm minijack connectors allow the SDA 2175´s standby mode to be controlled remotely.

Front panel

Fig 1: SDA 2175 front panel.

Controls

Mains switch

Turns the power to the unit on or off.

Indicators

OPERATE

Indicates the operational status of the SDA 2175.

Off

The SDA 2175 is in standby mode (controlled via the TRIGGER input).

Flashing

The SDA 2175 is in soft-start mode or the protection circuit is engaged.

On

The SDA 2175 is operating normally.

POWER

Illuminates when power is applied to the SDA 2175 and the mains switch is ON.

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Lyngdorf Audio SDA 2175 owner manual Introduction, Front panel, Controls, Indicators
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SDA 2175 specifications

Lyngdorf Audio has established itself as a key player in the high-end audio market, and the SDA 2175 power amplifier is a prime example of the company's commitment to performance and innovation. Designed for audiophiles and discerning music lovers, the SDA 2175 offers a striking blend of advanced technology and robust build quality, providing an exceptional listening experience.

At the heart of the SDA 2175 is a Class D amplifier design, which is renowned for its efficiency and low heat generation compared to traditional Class A or Class AB amplifiers. This efficiency likely translates into a compact form factor while delivering ample power. With a rated output of 175 watts per channel into 8 ohms, the SDA 2175 offers ample power to drive a wide range of speakers, making it suitable for both home audio and professional use.

One of the standout features of the SDA 2175 is its fully digital signal processing. This advanced technology allows for precise control over the audio signal, minimizing distortion and enhancing clarity. The amplifier incorporates a proprietary digital crossover and room correction technology, enabling users to achieve optimal sound reproduction tailored to their specific listening environment. This level of customization is particularly advantageous in complex acoustic spaces.

Moreover, the SDA 2175 is equipped with an innovative cooling system, which utilizes a combination of convection and forced air cooling to maintain optimal operating temperatures. This ensures that even during extended listening sessions, the amplifier performs consistently without the risk of overheating.

Another notable characteristic of the SDA 2175 is its premium build quality. The amplifier features a robust chassis designed to minimize vibration and interference, further enhancing sound quality. The sleek and modern aesthetic is complemented by high-quality components, ensuring longevity and reliability.

The SDA 2175 also includes a range of connectivity options, including RCA and XLR inputs, allowing for versatile integration into existing audio systems. Its user-friendly interface and control options make operating the amplifier straightforward, even for those new to high-fidelity audio systems.

In summary, the Lyngdorf Audio SDA 2175 is an exceptional power amplifier that combines advanced technology with top-tier performance. Its Class D design, digital signal processing capabilities, and robust construction make it a noteworthy option for anyone looking to elevate their audio experience. With its emphasis on both sound quality and user convenience, the SDA 2175 stands out as a remarkable achievement in contemporary audio engineering.
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