NAD T175 User manual

T 175 AV Tuner Preamplifier
• MDC(ModularDesignConstruction)allows
futureupgrades,includesAM200Dual
DSPAudiomoduleandVM200VXPVideo
Module
• Losslessdecoding:DolbyTrueHDandDTS-
HDMasterAudio
• DolbyDigital,DolbyDigitalPlus,ProLogicII,
 ProLogicIIx,DTS,DTSES,DTS96/24,
DTSNEO:6,EARSandEnhancedStereo
SurroundModes
• AudysseyAutoCalibrationofallspeaker
settingsusingsuppliedmicrophone
• AudysseyMultEQXTRoomCorrection
withcustomNADdevelopedtarget
responsecurves
• AudysseyDynamicVolumeandDynamicEQ
• 5A/VCustomPresetsstoreunique
speakerlevelandtonecontrolsettings
• Directaccessspeakerleveladjustmentfor
surround,centreandsubwoofer
• Customtoroidalpowersupplywith
separateanalogue,digitalandcontrol
regulation
• 24-bit192kHzA/DandD/Aconverters,
withselectedStereoDACsforthefront
channels
• 7AnalogueStereoAudioInputsincluding1
AudioFrontInputinthefrontpanel
• MediaPlayerMPfrontpanelinput
• 6AnalogueVideoInputsincluding1
S-Videoand1CompositeFrontVideoinput
inthefrontpanel
• 3ComponentVideoInputs
• 7DigitalAudioInputs-3Coaxial
and4OpticalincludingOpticalFront
inputinthefrontpanel
• 41080pHDMIDigitalAudio/VideoInputs
• CrossConversionofallanalogue
videoformats
• AnaloguevideotoHDMIConversion
• SigmaVXPImageProcessingwithHD
scalingto1080p
• 3AnalogueAudiooutputsincludingZone2
 AudioOutandwiththe2otherAudio
outputsassignablealsoasZone3and
Zone4AudioOut
• BackSurroundAmplifierChannelscan
bereassignedasZone2,3,4or
MainFront(Bi-Amp)
• 4VideoMonitorOutputs-
HDMI,Component,S-VideoandComposite
formats
• 3AnalogueVideoOutputs-2Video
(CompositeandS-Video)and1Zone
(Composite)
• 7.2AnaloguePre-Out(2Subwoofers)
• 2DigitalOutputs-1Coaxialand1Optical
(TOSLINK)
• 7.1AnalogueInput
• Zone2A/VlinelevelOutputwith
independentsourceandvolumeselection
> FEATURES
> POSITIONING
The NAD T 175 now comes with full High Definition decoding thanks to NAD’s innovative approach to upgrading your AV tuner preamplifier –
Modular Design Construction (MDC). It is NAD’s insistence on creating products with remarkable sound quality at sensible prices that has made
NAD the first choice among the most knowledgeable listeners from around the world. NAD’s ‘Music First’ philosophy dictates that we endow
our Audio Video products with the same warm, involving sound quality that makes music listening so rewarding with our stereo components.
This stands in stark contrast to our competitors who view Audio Video components primarily from a ‘content’ point-of-view, with sound quality far
down the list of priorities. Yet the T 175 is second to none in terms of flexibility and up-to-the-minute digital technology.
> FEATURES

• DigitalInputsavailableas2-channelanalogue
downmixonZone2Output
• Zone3andZone4AudioOutputwith
independentsourceandvolumeselection
• ZR4secondZoneremoteincludedwithdiscrete
codesforindependentzone
• IRinput
• 3xIRoutputs
• RS-232portinterfaceforadvancedcontrolsystems
• 3x12Voutputtriggers,1x12Vinput
• RDSFMandAMTuner
• 40directaccesspresetsthatcanbeamixofyourfavouriteAM,
FMandXM(orDAB)stations
• iPodReady–justaddNADIPD2DockforiPod
(iPodMenuonOSDandFrontPanelDisplay)
• XMReady–justaddoutboardXMmodule
(NorthAmericanversion)
• DABReady–justaddoutboardNADDB1module
(EuropeandAsia)
• HTRC1IlluminatedLearningRemoteControlwithLCDdisplay
> FEATURES CONTINUED
Modular Design Construction
NAD has developed a unique new (MDC) architecture that keeps pace with the fast
changing world of digital formats by allowing connectivity and feature upgrades
as new technology becomes available. This prevents premature obsolescence by
keeping pace with the latest developments in high performance audio and video
formats. Dealer installed hardware and software can add new connectivity and
features at a future date, allowing your T 175 to grow as your needs and tastes
develop. Most AV tuner preamplifiers require complete replacement with a new
model to get the latest features. With NAD you only replace the module you want
to upgrade - not the entire AV tuner preamplifier!
Separates vs. Receiver
Separate components have always been used in professional applications and
occupy the highest tier of performance for consumer electronics products. Simply
put, the receiver concept makes compromises in performance and flexibility in
favour of convenience and price. This is especially true for the power amplifier
section of the receiver. The large power supply and output stage heat sinks of the
power amp must be compromised to fit in the single chassis format of the receiver.
These high power parts can also cause interference with the low-voltage sensitive
circuits used in preamplifier, tuner, and decoder sections of the receiver. The T 175
combines all the control and decoding functions in one compact chassis, giving up
nothing for the convenience of the receiver, yet gives a big jump in performance
and flexibility by separating the power amp stages. The 5-channel NAD T 955
and the 7-channel T 975 power amplifiers are perfect accompaniments to
the T 175.
Audio Performance
Today’s advanced Surround Sound processsors require quality in the digital
decoding stages, the video processing section, and in the power amplifier design
for the best overall performance. The T 175 is an excellent example of the NAD
Design Team’s expertise in all three areas. Not only that, but we have made many
ergonomic refinements to simplify operation and make it more enjoyable to get all
the performance from this magnificently capable AV tuner preamplifier.
Using the latest Dual Core Floating Point DSP technology, NAD was able to include
the newest surround formats from Dolby and DTS, as well as NAD’s own highly
regarded music surround mode - EARS. The EARS circuit (Enhanced Ambient
Recovery System) is now optimized for 7-channel surround. Unlike the typical
artificially enhanced DSP modes like ‘Club’, ‘Stadium’, and ‘Church’, EARS uses
DSP technology to extract the natural ambience of the recording. This is redirected
to the surround channels to create natural surround sound from any 2-channel
source. This induces a warm natural reverberant effect without the hollow ‘BOING’
of artificial reverb.
The surround mode of the source material is automatically detected via the digital
inputs of the T 175 and the most advanced form of decoding is switched in.
Conversion of the encoded digital bitstream is performed with high resolution
and extremely linear D/A Converters carefully selected for their performance
capabilities.
Credit for the sound of NAD’s components rests squarely with our unique design
approach and our experienced and very talented design team. Most companies
design their products to a technical specification and a price point. While this
sounds logical enough, it does not address the way the product will actually be
used by the eventual owner. You don’t listen to specifications – you listen to music
and sound. While NAD products exhibit excellent technical measurements, we
have relied on our own ears and listening experience to determine the final design
of our products. Because of our unique design approach, NAD’s sound is simply
more real sounding, adding enjoyment and excitement to your favourite films and
music recordings.
Video Performance
The T 175 features NAD’s newly developed HDMI repeater featuring Sigma’s
VXP Image Processor. Both analogue and digital video sources can be selectively
processed using Sigma’s advanced VXP algorithms. This is the best performing
image processing engine we could find, and the T 175 is the lowest priced AV
tuner preamplifier on the market featuring this advanced technology.
> DETAILS

T 175 AV Tuner Preamplifier
The new VXP video board features video conversion to resolutions as high as
1080p and supports all SD and HD formats up to 2048 x 2048 pixels. Motion
adaptive de-interlacing with edge interpolation eliminates the jagged edge effects
common in lesser image processors. Film mode detection with output cadence
generation endows the video picture with a film-like smoothness of motion. The
programmable scaling engine also allows for aspect ratio conversion to perfectly
match the video source with the video display. Advanced noise reduction and
detail enhancement improve legacy analogue video sources to near HD quality.
Flexibility
The T 175 has all the flexibility required to serve as the command centre for even
the most sophisticated Home Theatre and multi-room systems. A full suite of
video switching caters to all the popular video formats (HDMI, Component Video,
S-Video, and Composite Video). Digital inputs (including a handy front panel
input) and outputs are available in both coaxial and optical formats to make it
easy to attach all your digital sources for playback and recording. Digital Inputs
are converted to analogue for use in Zone 2 and you can choose to convert unused
audio/video outputs for Zone 3 and Zone 4 use with independent source selection
and volume control.
With the T 175, NAD has made it easy to add more speakers for listening to music
in additional rooms or zones. Multi-room systems can be created using the Zone
2, 3 and 4 outputs to add amplifiers and speakers with the benefit of independent
source selection and volume control. A separate second zone remote is included,
and signals can be transmitted via remote IR sensors (not included) to the IR input
sockets on the rear panel of the T 175.
There are also 12 volt triggers to automatically switch remote zone amplifiers
on and off, and even an RS-232 data port for connection to highly advanced
automated control systems. Thoughtful features like discrete On and Off codes,
direct access to inputs and FM station presets facilitates the integration of the
T 175 into elaborate remote control systems.
An analogue 7.1 input is also provided for attaching a DVD-Audio player or any
other yet to be developed surround decoder, ensuring that the T 175 does not
become obsolete anytime soon.
Luxurious Simplicity
All the capability and flexibility in the world is quite useless if the AV tuner
preamplifier becomes too complicated to be operated by every member of the
family. NAD has taken special measures to make operation of the T 175 as logical
and straightforward as possible.
Initial system setup is best accomplished using your television monitor and the
clear and simple On Screen Display (OSD), which can be configured to also
give status updates as settings are changed in everyday use. Once the T 175 is
informed of your specific system setup, all settings are stored in a non-volatile
memory, making this a one time task. The informative front panel display indicates
complete information about the source being listened to or watched, including
selected surround mode and volume setting. The front panel display can be easily
customized by renaming inputs and even determining what information you prefer
to be displayed and when to display it.
Audyssey Auto Calibration is available using the supplied calibrated microphone.
Simply place the microphone in the listening position and select Audyssey auto-
calibration and the system automatically detects the connected amplifier’s
speakers, chooses the ideal crossover point to the subwoofer, checks speaker
phasing, and adjusts the levels and delays. These adjustments are made to a level
of accuracy that it would be difficult to duplicate by ear alone.
Audyssey MultEQ XT is the latest in digital sophistication, allowing for improved
frequency response in a large, family-sized sweet spot. Using the calibration
microphone to ‘hear’ your room, a series of test tones measure the speakers’
response and the room’s distorting echoes independently, and then calculates an
ideal response that minimizes the effects of the room’s echoes. While this sounds
simple, the digital technology that is required for this level of performance would
have cost many thousands of dollars just a few short years ago. But the electronic
technology is only half the story, since an advanced knowledge of acoustics is also
required to get good results from such a system. Working closely with Audyssey,
NAD’s acoustic engineers developed the final response curves that reflect our own
performance values.
Audyssey Dynamic Volume and Dynamic EQ work together to address the problem
of large jumps in volume when switching between different TV channels or when
advertisements are inserted into the program. There is also an effect caused by our
ears’ different sensation of low and high frequencies at different listening levels:
as the volume is reduced our sensation of bass frequencies is reduced more than
the midrange frequencies.
The T 175 tuner section can store a mix of your 40 favourite AM, FM and XM (or
DAB) stations for immediate recall.These presets can be custom named.And if your
selected FM station supports the Radio Data System (RDS), it will automatically
stream information about the station and music being played. We also include
a ‘Digital Broadcast Ready’ socket on the rear panel for adding outboard DAB or
XM modules. All the control software for these formats is included – just plug in
the module and start enjoying the clear sound and expansive content selection
available with Digital Radio Broadcast.
Five independent ‘Audio Video Presets’ can store speaker level and tone control
settings for instant recall, making it easy to custom tailor your system for different
types of program material. Encoded surround modes like Dolby Digital and DTS
are automatically selected if the program is so encoded. The T 175 also remembers
your last used settings when switched in and out of Standby mode.
The included HTRC 1 remote handset is in itself an engineering tour de force. Able to
control up to eight different components, an illuminated LCD screen clearly shows what
device is selected and what command is being sent. It has illuminated buttons for easy
operation in a low light environment, and the length of time the buttons are illuminated
can be easily adjusted. Remote commands for products not already included in the
HTRC 1’s memory can be easily taught to the HTRC 1. And the HTRC 1’s Macro
function allows up to 64 individual commands to be triggered by pressing just two keys.
With this feature, all of the commands required for watching a DVD, for example, are
executed automatically by the HTRC 1’s Macro function. There is also a USB port that
allows the HTRC 1 to be connected to a PC and using our freely downloadable program
from the NAD website, you can program, customize, memorize and clone the HTRC 1.

Summary
The T 175 offers remarkable performance and flexibility in a compact and simple-
to-operate package.This multi-channel powerhouse will bring your favourite music
and movies to life in your home entertainment room with an absolute minimum of
fuss and a maximum of pure enjoyment.
PREAMPLIFIER SECTION
Input sensitivity and impedance 350mV / 50kΩ
Frequency response ±0.5dB (ref. 20Hz – 20kHz)
Total Harmonic Distortion <0.08%
Input sensitivity 330mV (ref. 2V)
Signal/Noise ratio >93dB (ref. 500mV, A-weighted)
Signal/Noise ratio >83dB (ref. 2V, A-weighted)
Output impedance <150Ω
Maximum output level >3.5V
TUNER SECTION
AM BAND
Frequency range 530kHz - 1710kHz (120V version only, 10kHz steps)
531kHz - 1602kHz (230V version only, 9kHz steps)
Usable sensitivity 30dBu
Signal/Noise ratio >38dB
Total Harmonic Distortion <3%
Loop sensitivity 20dB S/N 66dBu
FM BAND
Usable sensitivity, Mono <16.1dBf
Signal/Noise ratio, Mono 60dB
Signal/Noise ratio, Stereo 55dB
Total Harmonic Distortion, Mono 0.25%
Total Harmonic Distortion, Stereo 0.5%
Channel Separation, 1kHz 40dB
Frequency response ±1.5dB (ref. 30Hz – 15kHz)
RDS decode sensitivity 28dBu
DIMENSIONS AND WEIGHT
Dimensions (W x H x D) 435 x 145 x 380mm (Gross)
Net Weight 8kg
Shipping Weight 12.5kg
* Gross dimensions include feet, extended buttons and rear panel terminals.
Note: Installers should allow a minimum clearance of 55mm for
wire/cable management.
> SPECIFICATIONS

T 175 AV Tuner Preamplifier
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. © 06/09 NAD Electronics International.
www.NADelectronics.com
> REAR LINE DRAWING