The front of the Plinius SA-250 Power Amplifier incorporates a small panel fitted with three switches. These switches control the functions most used on the amplifier.

MUTE

A BIAS

FRONT PANEL LAYOUT SHOWING MUTE, MAINS AND BIAS SWITCHES

The operation of these switches is, from the left:

MUTE SWITCH

It is not recommended practice to interfere with the input cables while the amplifier is switched on and connected to the loudspeakers, so a Mute switch is fitted to interrupt the input signal. This allows you to connect and disconnect the input cables without the necessity of turning the amplifier off.

The switch operates on a pulse system in conjunction with an LED indicator. When the amplifier powers up from start, the Mute automatically engages and has to be switched for normal listening. The Mute switch also disconnects the speakers while the LED is on. Take care not to touch any terminals other than the outputs when changing the output (loudspeaker) leads.

MAINS SWITCH

This heavy-duty rocker switch in the centre of the panel turns the Mains/Line Power to the amplifier ON or OFF. An LED in the centre of the front panel indicates that the power is on. When first switched on the power LED will pulse for ten seconds - this is an initialisation sequence, after which the power LED remains lit. The amplifier draws a moderately high current when switched on. Despite the "Soft Start Circuit" within the amplifier reducing current demand on the mains as the amplifier is switched on, it is not good practice to rapidly turn the Mains switch on and off repeatedly.

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Plinius Audio SA-250 manual Mute Switch, Mains Switch

SA-250 specifications

The Plinius Audio SA-250 is a remarkable power amplifier that has garnered attention for its robust build quality and superior sound performance. Known for its elegant design and advanced technology, the SA-250 is a favorite among audiophiles and music enthusiasts who seek high-fidelity audio experiences.

One of the standout features of the SA-250 is its solid-state architecture, which leverages a fully complementary output stage to ensure minimal distortion and maximum power efficiency. This amplifier is rated at 250 watts per channel into 8 ohms, providing ample power to drive a variety of loudspeaker types. With a dynamic power that reaches up to 500 watts into 4 ohms, the SA-250 can handle even the most demanding audio setups with ease.

The amplifier incorporates Plinius' proprietary New Zealand-crafted transformer, which offers excellent energy storage and helps maintain stable performance. This transformer design plays a crucial role in providing the SA-250 with a smooth, dynamic sound that retains musicality and clarity across all frequencies. The amplifier’s warm, analog sound signature is a testament to Plinius' commitment to creating equipment that enriches the listening experience.

Additionally, the SA-250 utilizes advanced circuitry to minimize signal degradation while maximizing bandwidth. Features such as premium-quality components, an extensive power supply, and meticulously engineered circuit layouts work together to produce a refined soundstage, detailed imaging, and remarkable instrument separation. The amplifier’s design not only emphasizes performance but also aesthetic appeal, with a polished aluminum chassis that fits seamlessly into any audio setup.

The amplifier's operational flexibility is another highlight, as it includes both balanced and unbalanced inputs, allowing for easy integration with a variety of preamps and audio sources. Its user-friendly controls and indicators further enhance the listening experience, making it simple to operate even for those new to high-end audio systems.

In summary, the Plinius Audio SA-250 stands out as a powerful and elegant amplifier that embodies the ideal balance of technology and artistry. Its ability to deliver a rich and immersive sound, paired with its reliable performance and sophisticated design, solidifies its position as a top choice for audiophiles seeking ultimate audio quality. Whether used in a dedicated listening room or as part of a larger home theater setup, the SA-250 continues to impress and inspire.