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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 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
Todays 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 Teams
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 NADs 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 favoured by many of todays 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 NADs 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 dont 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, NADs 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
center 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 tape outputs for Zone
3 and Zone 4 use with independent source selection and volume
control.
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.
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
detects which speaker is connected, 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.
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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
rooms distorting echoes independently, and then calculates an
ideal response that minimizes the effects of the rooms 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, NADs acoustic engineers developed the
final response curves that reflect our own performance values.
The FM tuner includes 30 favorite station presets that can be
custom named, or if the 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 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 Custom Presets can store unique
listening modes, DSP options, tone, speakers and display 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 T175 also remembers your last used settings
when switched in and out of Standby mode.
The included HTRC 1 remote handset is itself an engineering
tour-de-force. Able to control up to 8 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 low light environments, and the length of time the
illumination is on can easily be adjusted. Remote commands for
products not already included in the HTRC 1s memory can be
easily taught to the HTRC 1. And the HTRC 1s Macro function
allows up to 64 individual commands to be triggered by the
pressing just two keys. With this feature, all of the commands
required for watching a DVD, for example, are executed
automatically by the HTRC 1s 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 T175 offers remarkable performance and flexibility in a
compact and simple to operate package. This multi-channel
control center 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.
T 175 A/V Tuner Preamplifier
