Niles Audio SI-275 Amplifier 
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Niles Audio SI-275 Amplifier
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Niles Audio SI-275 Amplifier Details


Real World Power
The SI-275 delivers 75 watts per channel at 8 Ohms and 100 watts per channel at
4 Ohms. You’ll get tremendous bass and dynamics from every pair of speakers
powered by an SI-275.

Transparent Sound
The audio circuitry of the SI-275 is constructed using the finest parts available;
including 1% metal film resistors, high quality capacitors, and oversized heat sinks.
All this attention to technical detail creates a sound that is clear and uncolored with
phenomenal imaging.

Freedom From Crosstalk
Each channel of the SI-275 is powered via its own independent power supply. This
increases the isolation between the two channels, and eliminates cross talk guaranteeing you absolute silence as the backdrop to your music.

Current For Reactive Loads
The high current design of the SI-275 assures that even unusual and reactive loads are handled with aplomb. A massive toroidal transformer with two separate windings for each of the power supplies supplies more than ample current to your system.

Freedom from Fan Noise
The oversized heat sinks inside the SI-275 allow the amplifier to stay cool even when
operating into low impedance loads—without the noise of fan-cooled amplifiers.

Independent Level Controls
Each channel has its own independent level control enabling you to precisely
match the SI-275 to the rest of your system. The level controls also enable you to
limit the volume, preventing abuse of the system.

Lifetime Connections
The SI-275 features gold plated stereo inputs, the cascade stereo outputs as well as the five way binding posts are gold plated to ensure perfect connections without corrosion for years to come.

Turn-On Modes
The SI-275 features three turn-on modes: 1. Music Sense 2. External Voltage Trigger 3. Manual Turn-On via the front panel switch. You can configure the
SI-275 to interface with any kind of system and have the unit automatically turn on.

Automatic Protection
The SI-275 is equipped with sophisticated protection circuits. In the unlikely event
that a problem occurs, the amplifier shuts itself off. When conditions return to normal,
regular operation resumes.

Status Display for Troubleshooting
LED's on the front panel indicate Power, Active Status, and a Protection Warning. With a glance at the front panel, a troubleshooter is quickly provided with key information!

Control Output
A 12 volt DC output is provided whenever the amplifier is on, allowing you to
operate voltage-triggered devices like motorized screens and curtains.

Niles Audio SI-275 Amplifier Specifications

  • Fully discrete stereo amplifier
  • 75watts RMS per channel into 8 ohms, both channels driven
  • 100 watts RMS per channel into 4 ohms, both channels driven
  • Designed to drive multiple pairs of speakers connected in parallel
  • Stable into low impedance loads (2.66 ohms)
  • Three turn-on modes: music sense, voltage trigger and manual
  • 5-way binding posts
  • 12-volt control out
  • Voltage trigger input accepts 3-30V AC/DC
  • Removable 2-wire line cord
  • Left and right channel installer adjustable level controls
  • Automatic resetting, DC, short circuit and overload protection
  • Two year limited warranty
  • Niles Audio SI-275 Amplifier Reviews

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    Product Q & A

    I currently have an Adcom Tuner/Preamp (model GTP-500) along with a Niles SI-275 Amplifier. I believe the FM Tuner on the Adcom got fried during a recent lighting storm as I am no longer able to pickup/play any FM stations. My other inputs (XM Satellite Radio, CD Player, etc.) all work fine. If I have to replace my Adcom Tuner/Preamp, what devices would you recommend I look at. This system currently powers 5 pairs of in-ceiling speakers and 2 pairs of outdoor speakers, but routing the speaker output from the SI-275 to a Phoenix Gold SAM-200 speaker distribution panel. All speaker pairs are connected to a Niles volume control device. Thanks for any advice and guidance you can offer.
    Tuesday, May 01, 2012 09:17 PM
    Answer by a Your Electronic Warehouse Expert
    If you contact our Customer Service experts at 1-866-224-6171 they can help you with this very detailed question. Thank you for your inquiry. Have a great day! We look forward to hearing from you!
    Monday, May 07, 2012 10:43 AM
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    The full manufacturer's warranty from Niles Audio is only valid when the Niles Audio SI-275 Amplifier is purchased from an Internet Authorized Dealer. We will match any Internet Authorized Dealer's best price on the Niles Audio SI-275 Amplifier. The Niles Audio SI-275 Amplifier may be referred to by the following terms: SI275.

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