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This is for 2 NILES AmpsSI-275 2 channel stereo ampAnd SI-1230 12 channel Series II AmpBoth for only $600 !The Niles SI-1230 is a popular multi-channel power amplifier designed for distributed audio systems. It comes in a "Series 2" version, which is generally what you'll find available.Here's a breakdown of its typical price and specs:Price:The price of a Niles SI-1230 amplifier can vary significantly depending on whether it's new or used, and the vendor.* New: You can find new Niles SI-1230 Series 2 amplifiers ranging from around $800 to $1,700 USD from various online retailers and home entertainment stores.* Used: On secondary markets like eBay, prices for used units can range from under $100 for "parts only" units to around $200-$500 for working used units, and sometimes higher for units in "excellent" condition.Specifications (Niles SI-1230 Series 2):* Channels: 12 channels* Power Output (Unbridged):* 30 watts RMS per channel into 8 ohms (all channels driven)* 40-42 watts RMS per channel into 4 ohms (all channels driven)* Power Output (Bridged):* Each of the six adjacent speaker output pairs is bridgeable.* 80 watts RMS per channel into 8 ohms (when bridged, 6 channels total)* Minimum Impedance: 4 ohms (unbridged), 8 ohms (bridged)* Total Harmonic Distortion (THD):* 0.04% THD from 20 Hz to 20 kHz (8 ohms, unbridged)* 0.06% THD from 20 Hz to 20 kHz (4 ohms, unbridged)* 0.06% THD from 20 Hz to 20 kHz (8 ohms, bridged)* Frequency Bandwidth: 20 Hz - 20 kHz* Turn-on Modes: Manual, Audio Sense, External Voltage Trigger* Inputs: Typically 13 RCA inputs (12 dedicated, plus a BusMatrix™ input)* Outputs: 12 speaker outputs (binding posts)* BusMatrix™ Selector: Allows flexible routing of audio signals to different channels (Left, Right, Mono, or dedicated input).* Level Controls: Independent level controls for all 12 channels.* Dimensions: Approximately 17.25" (W) x 5.75" (H) x 16.25" (D)* Weight: Approximately 35 lbs.* Rack Mount: Includes rack mount ears.* Power Supply: Switchable 110V-230V.This amplifier is known for its versatility in multi-room audio installations, allowing for flexible power distribution and signal routing.
This is a notable dual-amp package, but at US$600 it is clearly above the recent market: with a median of US$148, a 75th percentile of US$223, this ask lands well into ambitious territory and needs a strong justification. In other words, you’re paying a big premium over typical used pricing, so it is not a casual pickup.
That said, Niles multi-room amplifiers are valued for clean, reliable whole-house distribution, steady power, and straightforward install use, which is exactly why working examples still have a following. If this set is very clean, fully tested, and comes with original accessories or documentation, it may appeal to someone building or restoring a Niles-based system; otherwise, the price only makes sense for a buyer who specifically needs this pairing and can verify both units are healthy.
Independent perspective — not a price guarantee. Always verify condition, accessories and provenance before purchase.
Niles Audio traces its origins to 1978, when it launched in Miami, Florida, as a pioneer in switching systems for audio retailers. From these humble beginnings, the company evolved into a cornerstone of custom home audio, earning its stripes as a founding member of CEDIA and building a legacy of installer-focused innovation over four decades. Acquired by Linear LLC in recent years, Niles continues to uphold its heritage while expanding under new ownership.
The brand specializes in comprehensive whole-home audio solutions, offering over 500 products that span architectural speakers, amplifiers, receivers, automation controls, and accessories for seamless integration. Its portfolio emphasizes multi-room distribution, home theater systems, outdoor landscape audio, and cutting-edge options like the nearly invisible Cynema Soundfield in-wall soundbar, all designed for custom integrators to deliver professional-grade performance across indoor and outdoor spaces.
Niles holds a strong mid-to-high-end position in the custom installation market, renowned among savvy homeowners and professionals for reliable, high-quality distributed audio that blends effortlessly into modern living. Far from a vintage collector's niche, it remains a go-to for discerning buyers seeking robust, integrator-friendly systems that prioritize exceptional entertainment without compromise.
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