Niles Audio Corporation SI-245 Amplifiers

Niles Audio Corporation SI-245 Amplifiers 


45 watts RMS into 8 ohms, 70 watts RMS into 4 ohms Fully discrete stereo amplifier designed to drive low impedance loads Three turn-on modes: music sense, voltage trigger and manual 5-way binding posts; 12-volt control out Multi-room audio systems operate better when you use an amp that offers greater flexibility than a typical stereo amp. If you own a receiver with a second-zone preamp output, the Niles® SI-245 is the perfect power amp for those second-zone speakers.

You get 45 high-current watts RMS per channel and 4-ohm stability — connect two pairs of 8-ohm speakers in parallel without worrying about overloading the amplifier or speakers.


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[Aug 05, 2018]


Built like a tank. VERY heavy with a huge toroidal transformer. Sonics are a full step or two up from most mid-priced HT receivers (especially in the quality of bass reproduction). Compared to my Adcom GFA-535 the Niles has a colder and a bit more forward sound. BUT, this can be a good thing depending on your speakers and personal taste. To my ears the Adcom's famous "warmth" is a deviation from neutral sound and a form of coloration. The Adcom's warmth is a bloated mid-bass. The Niles bass is more controlled, leaner, and neutral. Which one is better depends on your personal taste. With that said, both amps are the best eBay amp bargains you're likely to find.


At their used price there's not much to complain about. They're not going to give you the depth and richness of a great high-end amp and the upper mids lack full body. You get what you pay for. If you're looking for a true buget amp (mine was $79 and that included shipping) you should put this one on your list.

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