NAD T175 User Manual
T 175 A/V Tuner Preamplifier
Features
• Holmgren™ Toroidal power supply with separate analog, digital,
and control regulation
• Modular construction for simple upgrade and service
• Audyssey Auto Setup and Calibration of all speaker settings
using supplied microphone
• Audyssey MultEQ XT Room Correction with custom NAD
developed target response curves
• Data Port for use with optional NAD IPD-1 Dock for iPod
• Dolby Digital, Dolby Digital EX, ProLogic II, ProLogic IIx, DTS,
DTS ES, DTS 24/96, DTS NEO:6, EARS and Stereo Enhanced
Surround Modes
• 5 A/V Custom Presets store unique listening modes, DSP
options, tone, speaker and display settings
• Direct speaker level adjustment for surround, center and sub
• Burr-Brown 24 bit 96kHz A/D converter
• Burr-Brown 24 bit 192kHz Stereo D/A converters (x5)
• Texas Instruments Aureus™ 7.1 high speed DSP (32 bit dual
core floating point design)
• 4 v1.3 1080p HDMI Digital Audio/Video Inputs
• HDMI 1080p bandwidth with full On-Screen Display (OSD)
• Cross Conversion of all analog video formats
• Analog video to HDMI Conversion
• 7 Analog Stereo Audio Inputs (1 front panel)
• Media Player MP front panel input
• 6 Analog Video Inputs, all S-Video and Composite (1 front panel),
®
3 Component Video
• 7 Digital Audio Inputs, 3 Coax and 4 Optical (1 front panel)
• 3 Analog Stereo Audio Outputs, 2 assignable as Tape Out, or
as Zone 3 and Zone 4 Outputs with independent source and
volume control
• 4 Video Monitor Outputs, HDMI, Component, S-Video and
Composite formats
• 3 Analog Video Outputs, 2 Tape (Composite and S-Video) and 1
Zone (Composite)
• 2 Digital Outputs, 1 Coaxial, 1 TOSLINK
• 7.1 Analog Input (for DVD Audio/SACD/ETC.)
• Zone 2 A/V Line Level Output with independent source and
volume selection
• Digital Inputs available as 2 channel analog mixdown on
Zone 2 Output
• ZR-4 Second Zone Remote included with discrete codes for
independent zone
• 3 x IR Outputs, 1 x IR Input
• RS-232 port interface for advanced control systems
• 3 x 12V Output Triggers, 1 x 12V input
• Preamp Outputs for all 7.2 channels (2 Subwoofers)
• RDS FM/AM Tuner with 30 direct access presets
• XM Ready – XM subscription and optional XM module required
• DAB Ready – just add optional NAD DB1 DAB module
• HTRC-1 Illuminated Learning Remote Control with LCD display
Details
The NAD T175 is heir to many generations of award winning NAD designs. This exceptional pedigree is
evident in both the look and the feel of the T175, and it is unmistakable the moment you listen. 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 Surround Sound 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 Surround Sound components primarily from a “content” point of view, with sound
quality far down the list of priorities. Yet the T175 is second to none in terms of flexibility and up-to-theminute digital technology.
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 favor 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 lowvoltage sensitive circuits used in preamplifier, tuner and decoder
sections of the receiver. The T175 combines all the control and
decoding functions in one compact chassis, giving up nothing
to the convenience of the receiver, yet by separating the power
amp stages gives a big jump in performance and flexibility. The
5-Channel NAD T955 and the 7-Channel T975 power amplifiers
are perfect accompaniments to the T175.
Performance
Today’s advanced Surround Sound processors require quality in
the digital decoding stages, the video processing section and in
the analogue preamp stages for the best overall performance.
The T175 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 this magnificent processor is
capable of delivering.
Using the latest 32 bit Dual Core Floating Point DSP technology,
NAD was able to include the popular surround formats from Dolby
and DTS, as well as including NAD’s own highly regarded music
surround mode; EARS. 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 artificial “BOING” of digital reverb.
The surround mode of the source material is automatically
detected via the digital inputs of the T175, and the “highest” or
most advanced form of decoding, based on your setup, is switched
in. Conversion of the encoded digital bitstream is performed with
high resolution and extremely linear Burr-Brown 24 bit/192kHz
D/A Converters carefully selected for their performance
capabilities. The T175 uses five two-channel DACs rather than the
usual single 8 channel DAC favored by many of today’s surround
sound processors. We have found that the sonic performance
of the two-channel DACs used in a dual differential mode, is well
worth the extra cost of this configuration.
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.
Flexibility
The T175 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 multi-zone
applications.
With the T175, 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
additional 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 T175.
There are also 12 volt triggers to automatically switch 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 facilitate the integration of the T175 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, making
sure the T175 does not become obsolete anytime soon.
The T175 includes a data port specifically designed to control an
iPod with the addition of NAD’s optional IPD-1 Dock accessory.
This allows the iPod’s meta-data to be displayed on the OSD and
be controlled using the NAD remote control. Audio and Video
connections and iPod recharging are also featured in the iPod
Dock.
All input circuitry is contained on 5 easily removable plug in cards.
Although this construction technique is more costly to implement,
it offers several important advantages. 1) Speed to market for new
technology. 2) Upgrade for older units 3) Simple field service.
Luxurious Simplicity
All the capability and flexibility in the world is quite useless if
the receiver becomes too complicated to be operated by every
member of the family. NAD has taken special measures to make
operation of the T175 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 T175 is informed of your
specific system set-up, 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 have displayed and when to display it.
Automatic Audio Setup is available using the supplied calibrated
microphone. Simply place the microphone in the listening position
and select Audyssey Auto Calibration and the system automatically
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