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Fully Discrete High Current Stereo Amplifier for High Power Whole Home Music & Home Theater Systems
Niles Audio FG01055 SI-2125 High Current 2 Channel Amplifier, 125 Watt
Niles Audio FG01055 SI-2125 High Current 2 Channel Amplifier, 125 Watt
Niles Audio FG01055 SI-2125 High Current 2 Channel Amplifier, 125 Watt
Item# 67272
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  • Shelf-top
  • Manufacturer limited two year warranty
  • Staus display for troubleshooting
  • Multiple turn "On" modes
  • Current for reactive loads
  • Illiminates noise from internal fan
  • Designed and engineered in the USA

Essential Info

The Niles Audio SI-2125 2 Channel Amplifier offers quality and flexibility that are years beyond that of the competition. Because of excellent quality control and some of the highest standards in the industry, as long as this device is installed and operated properly the user will receive years of satisfaction. This amplifier is designed for powering either home theater or whole home audio applications, which it delivers in a very convenient way. Extraordinary bass and incredible sound dynamics will be provided to every pair of speakers powered by the SI-2125. The finest internal parts are used to construct the audio circuitry giving you clear sound and phenomenal imaging.


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Features & Benefits
The SI-2125 provides real world power pushing 125 Watts per channel at 8 ohms or 175 Watts per channel at 4 ohms. High quality capacitors, oversized heat sinks, and 1% metal film resistors all take part in creating wonderful transparent sound. High quality gold plated connections have been used in this model to ensure they remain connected without corrosion for years to come.

Absolute silence as a backdrop for your music, in the past, has been hard to obtain. Cross-Talk between channels is eliminated due to each channel being powered with its own individual power supply. Each channel also has an individual level control for volume. This allows you to be sure all decibel levels match and prevent abuse of the system. If a problem were to occur, for example a large spike in voltage through out the home wiring, the amplifier shuts its self off. As soon as the sophisticated protection circuits detect normal conditions, the amplifier will return to its normal operating mode.

More Niles Audio Amplifiers
Niles Audio FG00795 SI-245 High Current 2 Channel Amplifier, 45 Watt
Niles Audio FG00770 SI-275 High Current 2 Channel Amplifier, 75 Watt

ManufacturerNiles Audio
Manufacturer Product No.FG01055
Design PrincipleLinear voltage/current amplification
Continuous Average Power Output125 watts per channel RMS at 8 ohms, both channels driven, 175 watts per channel RMS at 4 ohms, both channels driven, 350 watts bridged channel RMS at 8 ohms
Input Impedance18K ohms
Input Sensitivity.830V for 8 ohm rated power, .720V for 4 ohm rated power
Overall Voltage Gain31.5 dB
Frequency ResponseBandwidth Limited from 10 Hz to 70 kHz (-1 dB)
Signal to Noise Ratio110 dB, A-weighted
Total Harmonic Distortion @ 8 Ohms.02% THD from 20 Hz to 20 kHz @ full rated power
Total Harmonic Distortion @ 4 Ohms.02% THD from 20 Hz to 10 kHz @ full rated power
Overall Dimensions17" wide 5 1/2" high (including feet) 13-1/8" deep
Weight26 lbs
Important notes:
Only merchandise credit for defective items returned within 30 days of purchase. No other returns allowed on this item.
Manufacturer contact information: Niles Audio Corp, Tel: (305) 238-4373



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