NAD – M15 – Master Series – Surround Sound Preamplifier

The surround preamp processor serves as the ‘brains’ of your surround sound system. It takes the raw, unprocessed digital audio signals, decodes them into multiple (5.1, 6.1, or 7.1) analog channels, and sends them on downstream to your amplifier and speakers. Compatibility is an important issue, as there is a multitude of different audio and video formats that must be catered to, with provision for several different types of signal transmission. Whether it is digital or analog, the M15 has the flexibility to accept all the popular formats, including the latest, HDMI (High Definition Digital Interface). Once the signal arrives at the M15′s input, it must be buffered, identified, decoded, and any ‘post processing’ routines (like THX) must be applied before the signal is converted from digital to analog and sent to the outputs. There is also a requirement to ‘redirect’ bass frequencies, depending on the capabilities of the particular speakers used in your system. All this processing is controlled in the M15 by the latest high speed DSPs, loaded with NAD’s proprietary software. These DSPs are capable of 100s of millions of operations per second! Fortunately, NAD uses all this processing power to keep the everyday operation of the M15 as simple and intuitive as possible. Once you set the system and user preferences, the M15 operates very much like a stereo preamplifier. Just select the desired source (audio or video), set the volume, and hang onto your hat, as the M15 takes you deeply into the essence of the music or movie you are about to experience. The User Interface boasts a clear front panel display as well as an ‘on screen display’ that provides setup information directly on your connected TV screen. This is where the M15 can be customized to reflect your specific needs and desires. Surround format preferences, level matching of inputs (so there won’t be an annoying jump in volume when you switch sources), and even the renaming of inputs can all be set in “BUY NOW”

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