NAD Stereo Amplifier S 170i User Manual

S 170i Surround Sound Preamp Processor  
• Dolby Digital, Dolby Digital EX, ProLogic II, DTS,  
DTS ES, DTS NEO:6, Matrix 7.1, THX EX 5.1/6.1/7.1  
Decoding, Stereo Enhanced Stereo Surround Mode  
• THX Ultra 2 certified  
The original S 170 was the first THX EX processor to reach  
the market nearly two years ago, and it still remains the  
benchmark for sonic performance in this price category.  
With the development of THX Ultra 2, DTS ES and Neo:6,  
and Dolby EX and ProLogic II it is logical that NAD would  
update the S 170 to include these new decoding formats.  
We are pleased to introduce the S 170i, offering all the  
latest decoding formats while maintaining the same elegant  
simplicity, style, and performance of the original.  
• Latest Generation Motorola DSP Processor  
• NAD’s Proprietary EARS Surround Music Mode  
• 24 bit/96kHz Compatible  
• 24 bit Resolution DACs for all channels  
• 10 Inputs: 6 Video (3 are full in/out), 4 Audio (1 is  
Tape Monitor In/Out loop)  
• All Video Inputs are S-Video and Composite  
• Component Video Input  
• 6 Digital Inputs: 1 BNC, 3 Coaxial, 2 Optical; freely  
assignable to any input  
Significantly, in these days of rapid digital format changes,  
the S 170i features a fully upgradeable digital processor  
on a separate plug-in circuit board. In fact owners of the  
S170 can have their unit upgraded to the “i” version for  
a fraction of the cost of purchasing a new unit, proving  
the value of this design concept. All DSP processing and  
operating system “intelligence” is located on a plug-in  
module, making major upgrades a fairly simple process.  
Minor upgrades are offered free of charge and can be  
implemented via download from a PC using the RS-232  
port located on the rear panel.  
• 2 Digital Outputs: 1 Coaxial, 1 Optical  
• Ext 5.1 Input for connection of DVD-A  
• Multi-Source 2nd Zone Stereo Output  
• 3 x 12V Trigger Outputs  
• IEC Detachable Power Cable  
• NAD Link  
• RS-232 Port for advanced control systems and  
software upgrade  
• HTR-2 - 8 Device Illuminated Learning Remote with  
Macro function  
• ZR-2 Second Zone Remote  
The modular processor dictates the use of a specially  
engineered, ultra-low-noise switch mode power supply,  
so that the S 170i achieves supply voltages of unexcelled  
stability and purity that remain totally independent despite  
varying demands on all eight channels, or even the  
requirements of future digital upgrades.  
The S 170i is squarely focused on the individual  
who prizes sonic performance above all else,  
and appreciates the simplicity of the NAD  
approach. While you can find less expensive  
processors, and processors with a longer punch  
list of “features”, the S 170i offers a level of  
performance for money that is unmatched.  
Whether used as an analogue preamp in Stereo  
Bypass mode, or used to decode the  
latest formats from Dolby, DTS, and THX,  
the S 170i brings a purity and dynamic realism  
to every performance. This goes beyond  
specs or features and speaks to the real reason  
for spending this much money on a Hi-Fi:  
to create an experience that transports the  
listener/viewer to that special place created by  
the recording artist. Indeed, it is this ability to  
“make the machine disappear” that separates  
the great products from the merely good  
products. The S 170i is a great product.  
The bass management circuit of the S 170i offers  
tremendous flexibility, while still meeting all the Dolby and  
THX mandates for bass redirection and Low Frequency  
Effects (LFE) channel management. The crossover  
frequency can be adjusted in 10Hz increments from 40Hz  
to 200Hz (except in THX mode where 80Hz is specified),  
and individual channels can have their level tweaked in  
0.5dB increments allowing much finer adjustment than that  
offered by most receivers and processors. Uniquely, the  
S 170i uses both digital and analogue filter sections for a  
superior electronic crossover characteristic.  
Despite its deceptively simple appearance, the S 170i  
is also fully equipped to serve as a very able master  
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Decoding formats  
Dolby Digital, Dolby Digital EX,ProLogic II, DTS, DTS ES, DTS NEO:6, Matrix  
7.1, THX EX 5.1/6.1/7.1 Decoding, Stereo Enhanced Stereo Surround Mode  
32kHz, 44.1kHz, 48kHz, 96kHz  
Sampling Rates  
EARS Stereo (analogue bypass)  
Analogue performance  
Analogue input impedance  
Analogue frequency response  
Maximum input level  
16kΩ / 100pF  
20Hz - 20kHz +/- 0.2dB  
3V rms  
Signal/noise ratio  
Dynamic Range  
Analogue channel separation  
Maximum output level  
6V rms  
Output impedance  
Main pre-out  
Tape out  
Multi-room output  
Tone Controls  
(@20Hz) +/- 12dB  
(@20kHz) +/- 12dB  
(@ 3kHz) +/- 6dB  
Digital input performance  
THD+N (Bandwidth 10Hz - 20kHz)  
Physical Specifications  
Dimensions (W x H x D)  
17 3/4 x 3 7/8 x 11 1/4”  
(450 x 97 x 285mm)  
11 lbs (4.99kg)  
Net Weight  
Shipping Weight  
12.99 lbs (5.89kg)  
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NAD Electronics International reserves the right to change specifications or features without notice. NAD is a registered trademark of NAD Electronics  
International. All rights reserved. No part of this publication may be reproduced, stored, or transmitted in any form whatsoever without the written  
permission of NAD Electronics International. © 10/03 NAD Electronics International.  
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