STR Series preamplifier: The Anthem STR Preamplifier combines the
benefits of an advanced preamp with the power of a processor, as well as
functions like a leading-edge DAC, onboard Anthem Room Correction (ARC),
customizable bass manager for mono or stereo sub outs, plus MM and MC phono
inputs - far more than the average preamplifier. It also includes new
generations of many of Anthem's award-winning, audiophile-loving, review-praised
digital signal processing innovations, delivering a noticeably higher level of
audio performance realism. Clarity is maintained using carefully selected
components, many of them engineered exclusively in-house at Anthem. Anthem
believes that two-channel listening demands attention to detail, with flawless
signal integrity being the benchmark of stereo performance.
Upsampling DAC & Digital Audio Inputs: The Anthem STR
preamplifier includes a high-resolution DAC with support for
32-bit/384kHz PCM and DSD 2.8/5.6 MHz digital audio sources, employing 64-bit
accumulation and feedback to preserve the finest detail in the music and to
avoid degradation. Through the rest of the DAC circuitry, thin film high
precision resistors and super low noise op-amps are used for lowest distortion,
lowest noise, and most transparent sound. To help achieve that effect for all
input resolutions, a dedicated asynchronous 32-bit/192 kHz upsample rate
conversion is also used. This way, the DAC stage's anti-imaging filter is
optimized for this sampling rate alone, resulting in an audio frequency range
that's unmatched in purity, regardless of input format. In the process, the data
gets re-clocked, providing immunity from performance-marring source jitter. The Anthem STR
preamplifier is designed with the shortest possible signal paths, and
differential digital-to-analog circuitry to cancel artifacts and keep noise to a
minimum. The preamplifier offers USB, AES/EBU, coaxial, & optical digital
- Asynchronous USB-B Input: Your Windows PC or Mac
computer can be connected to STR Preamplifier's asynchronous
USB-B input. Stereo PCM (up to 32-bit/384kHz) and DSD (2.8/5.6MHz) formats
are supported through this connection. Simply connect your computer and use
its media playing software to have music playing through the Anthem STR. If
using a Windows PC, a USB DAC driver (XMOS) must first be downloaded from Anthem's
website and installed. Mac OS does not require a separate USB driver. This
high-quality USB audio input transforms digitally stored audio from your
Windows or Mac computer into warm, natural analog sound.
- Digital Audio Inputs: The STR Preamplifier is
equipped with two optical (toslink) digital inputs, two coaxial (RCA)
digital inputs, and one AES/EBU (XLR) digital input. These digital inputs
support 2ch PCM audio (up to 24-bit/192kHz). They are not compatible with
Dolby Digital, DTS, or multichannel PCM.
Analog Audio Inputs: The Anthem STR Preamplifier is
outfitted with balanced, unbalanced, and phono analog inputs. Unwanted changes
in volume when switching to or from an analog source can be prevented by
adjusting the analog input levels from -20 to 20dB in 0.5dB increments. This is
especially useful for some XLR sources that produce higher than typical output
level, and for the phono inputs since cartridge output levels vary considerably
- Balanced & Unbalanced Analog Inputs: The Anthem
Preamplifier is equipped with two pair of balanced XLR analog
inputs and four sets of unbalanced stereo RCA inputs. A balanced XLR
connection offers the highest analog transmission quality, particularly over
long cable lengths because it rejects noise and hum pickup.
- Separate MM & MC Phono Inputs: Anthem has also taken
into consideration the resurgent popularity of vinyl long-playing records,
and has included separate inputs for moving magnet (MM) and moving coil (MC)
cartridges, with the phono section completely shielded to maintain signal
purity. The MM input is suitable for turntables using moving-magnet and
high-output moving-coil phono cartridges. The MC input uses input impedance
and gain tailored to low-output moving-coil cartridges. There is also a
ground wire terminal on back of the integrate amp to connect your
turntable's ground wire to prevent excessive hum.
- Rumble Filter: Use this with a turntable to reduce or eliminate
low-frequency noise below the music spectrum. Rather than rolling off all
content including the music, the filter acts only on vertical stylus motions
that are inherently not part of the music signal. This is especially
effective with warped records that cause excessive or non-musical woofer
motion. Select a frequency from 10- 60Hz (in 1Hz increments).
- Phono EQ: The Phono EQ, Bass Turnover, Bass Shelf, and 10k
De-Emphasis controls allow the proper equalization of records that predate
the RIAA equalization standard.
Balanced (XLR) & Unbalanced (RCA) Analog Outputs: The
Anthem STR Preamplifer features variable balanced XLR and unbalanced RCA preamp
outputs for connection of an external power amplifier (such as the
STR Amplifier, sold separately). It also offers fixed
unbalanced line-level RCA outputs suitable for a headphone amp or recording
Dual Subwoofer Outputs: The STR Preamplifier is
outfitted with two sets subwoofer outputs (balanced XLR/unbalanced RCA) & bass management giving you more options
for subwoofer configuration. Use one subwoofer or two for both channels, or two
independent right-and-left channel specific subwoofers. The bass management in
conjunction with ARC is uniquely engineered for seamless subwoofer blending,
achieving an incredibly accurate and lifelike performance.
- Crossover Frequency: The subwoofer output crossover
frequency can be set from 25 to 160Hz in 5Hz steps. If you will be using the
personal computer version of ARC, you do not need to select the crossover
frequency since it will be set while running the program.
- Polarity & Phase: Certain subwoofer positions can cause
bass frequency cancellation. When the front speakers and subwoofer are out
of phase or misaligned, they work against each other resulting in weak and
dislocated sounding bass. This can be corrected by adjusting Phase and
Polarity. As a general guide, set Polarity to Normal if the subwoofer is
near the front speakers and to Inverted if the subwoofer is near the back of
the room. Compare Normal to Inverted and use the setting that provides
louder bass. Continue fine-tuning the crossover region using the Phase
control which provides adjustment from 0 to 180 degrees in 5 degree
Home Theater Bypass: The concept of combining a stereo
preamplifier with a home theater system is taken to a whole new level. The STR
preamplifier supports two subwoofer channels in addition to the two fronts. XLR
as well as RCA connection is provided for all channels, and HT Bypass mode
engages while the preamp is on standby. This way, you don't have to turn it on
when watching movies. To allow the purest signal path, relays are employed to
hard-wire the input jacks to the outputs - the STR Preamplifier essentially
becomes a straight wire.
Anthem Room Correction (ARC): The STR Preamplifier includes the newest and most powerful generation of
Anthem Room Correction (ARC), with 50% more processing power than any other
version of ARC. This proprietary calibration tool, with its easy-to-use
interface, automatically shapes the acoustic signature of your speakers for the
best possible sound quality in your unique listening space. Anthem Room
Correction (ARC) is a proprietary digital signal processing system that allows
you to quickly and accurately optimize the performance of your audio equipment
to better suit the unique parameters of your room. By listening to your room's
acoustic signature, ARC can tune your equipment to correct for the
performance-robbing effects (reflections, resonances, standing waves, etc.) of
the various surfaces and other obstacles in your room. ARC is easy to use, and
just a few simple steps can optimize your speakers for your unique listening
space. ARC is one of the most sophisticated, accurate, and detailed digital
room correction technologies available today. There are 3 ways to calibrate your
system using ARC or ARC Mobile.
- Mobile App: Download
Anthem's ARC Mobile app to
Apple iOS 9.2+
Android OS 5.0+ device. This method uses your iOS device's built-in
microphone for measurements.
- Mobile App + ARC Mic: Download
Anthem's ARC Mobile app to
Apple iOS 9.2+
Android OS 5.0+ device, select "ARC Universal Microphone" on the app,
and connect the included ARC Microphone to your iOS device for measurements.
Please note that Android devices require a USB OTG adapter (sold separately)
to use the optional calibrated microphone; many Android phones already come
with these adapters.
- Windows PC App: Download and install
software to your Windows PC (7 or later). Connect the included ARC Microphone to your Windows PC, and connect the Preamplifier via USB or LAN. After running your measurements, you
can customize the results, set up multiple configurations, and print
correction curve graph. Not compatible with Mac.
Note: ARC digitally compares a room's acoustic signature to
that of the lab standard. It measures the response of each speaker relative
to the listening area. Then it uses advanced algorithms to eliminate the
negative effects of the obstacles in the room, adjusting response and
correcting phase effects. When ARC removes the obstacles, what's left is the
lab standard performance.
Listener Position & Modes: Through the Listener Position
setting, sound coming from all speakers is coordinated to reach the listening
area at the same time. This way, proper imaging is achieved. The channel with
the greatest distance setting will have no delay while channels with shorter
distance settings will be delayed accordingly. Distances can be set between 0 to
29' Distances may be set before or after running ARC (ARC does not set
distances). The Anthem STR integrate amplifier also offers four listening modes
to choose from - Stereo, Mono, Both Left, or Both Right.
- Stereo: Left channel audio is output from the left
speaker while right channel audio is output from the right speaker.
- Mono: Blends the left and right channels into both
speakers which can be useful when playing mono records with a stereo
- Both Left: Sends the left input to both speakers and
can be useful when playing a mono record with a stereo cartridge when the
left groove wall has less wear and sound better than the right groove wall.
- Both Right: Sends the right input to both speakers and
can be useful when playing a mono record with a stereo cartridge when the
right groove wall has less wear and sound better than the left groove wall.
Front-Panel Display: The large Thin Film Transistor (TFT)
display on the front-panel can be seen from across the room, and gives you
surprisingly easy operation over the STR Preamplifier via front-panel
and remote control. Each input can be renamed, up to 10 characters long for
easier identification on the front-panel display. The display's brightness can
be set to Max, High, Medium, Low, or Off.
Remote Control: In addition to front-panel control, the
Anthem STR Preamplifier comes with an IR remote that provides wireless operation of the
The preamplifier also offers IP & system control through its LAN & RS-232
ports, as well as provides a 12V trigger output and IR input.
- IP Control: The preamplifier offers IP control
through its wired RJ-45 Ethernet network connection.
- RS-232C Port: The preamplifier's RS-232C port
provides seamless integration with a wide range of third-party home
automation control systems (such as AMX or Crestron).
IR Input: The 3.5mm IR input jack allows you to control the
preamplifier without line-of-sight access using an optional IR
remote control system (sold separately) and locating the remote sensor in
- 12V Trigger Output: The preamplifier has a
3.5mm trigger output to send a 12V/40mA DC turn-on signal to another
component that accepts a 12V trigger.
Auto Off: When there is no input signal for 5/10/20 minutes
or 1/2/6 hours, the preamplifier will automatically turn off.
Detachable AC Power Cord: The Anthem STR Preamplifier comes with a detachable AC power cord (IEC 2-prong).
Crafted In Canada: The Anthem STR Preamplifier is designed,
engineered, & manufactured in Canada. From the idea stage to the final
manufacturing specs, Anthem has complete control over the whole intricate
process. Anthem takes pride in this personal attention to detail, and use only
the highest quality components, many designed and engineered in-house.