Plinius Audio SA-250 manual Error Detection, Fuse Protection, Ecologic Control

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ERROR DETECTION

The Plinius SA-250 Power Amplifier has in-built error detection. This will function under the following conditions:

When the amplifier is overdriven/clipped

If any internal fuse is damaged

Should either of these circumstances arise the amplifier will disconnect both channels and mute the input. This condition will remain until the input signal level is reduced or the damaged fuse replaced. When error detection is triggered the power LED will turn off and the mute LED will pulse. The internal error LED (located towards the front of the circuit board in the top cavity of the amplifier) will also light.

FUSE PROTECTION

When any internal fuse is damaged one or more fuse warning LEDs will light. These LEDs are under the amplifier lid located to the centre front of the main circuit board. Should any of the internal fuses need to be replaced the base of the amplifier will need to be removed and the fuses located. The rail fuses are near the middle of the circuit board. Replace them with the same type (10 amp normal blow).

IMPORTANT: DO NOT FIT A FUSE WITH A HIGHER RATING.

Please note that fuse failure may indicate a severe problem. Check all speakers and speaker cables for damage/short circuit etc. Should the amplifier continue to exhibit rail fuse failure contact your PLINIUS dealer.

ECOLOGIC CONTROL

The Plinius SA-250 is also fitted with a microprocessor which monitors and performs the Bias and Mute functions. It is programmed to switch the amplifier back into Class AB if no signal has been present at the input for a predetermined time. This time can be adjusted to Off, 15, 30 or 60 minutes. During the last minute without signal the bias LED will pulse to indicate the unit is about to return to Class AB. The purpose of this function is to prevent the amplifier being left in Class A while unattended for a period of time.

To adjust this time constant the amplifier lid must be removed and the small jumper JP4 located on the main circuit board at the front left shifted to the appropriately labelled pins. Please ensure that your amplifier is switched OFF and disconnected from the mains supply before this adjustment is made. The factory setting is 30 minutes.

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Contents A s s a P o w e r a m p l i f i e r Page Serial Number Date of Manufacture Final Test Certified By Page Page Mains Switch Mute SwitchBias Switch Amplifier Configuration Selector Input Terminals Amplifier Configuration Selector ACSOutput Terminals BRIDGED/MONO BALANCED/UNBALANCED SignalsOutput Terminals Stereo Mains Power Cord IEC Connector Ground Lift SwitchMains Voltage Connection Placement and VentilationRCA Stereo RCA Bridged Mono XLR Stereo XLR Balanced Mono XLR Stereo RCA StereoRCA Bridged Mono Termination Quality BI-WIRINGXLR Balanced Mono Phasing or Polarity Connecting the Mains SupplyEcologic Control Error DetectionFuse Protection MAINS/LINE Fuse LED Brightness ControlPage Page Input Impedance 47kΩ Pages 11,12 Box Palmerston North New Zealand

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.