Class-D Amplifier Circuit: The power amplifier stage is based upon a
tried and tested Class-D amp, manufactured by ICEpower of Denmark. It converts a
high-resolution sound source into high-definition speaker signals using a
feedback loop between a hybrid feedback controlled oscillating modulator (HCOM)
which faithfully amplifies the signal, and a multivariable enhanced cascade
control (MECC). The efficient design of the 43W + 43W (4Ω)
or 22W + 22W (8Ω) amplifier creates
very little heat, eliminating any need for a cooling fan, thus affording a quiet
environment that's ideal for musical appreciation.
Burr Brown DAC: The TEAC AI-301DA uses a Burr Brown 1795 DACs
for high performance and support of a wide range of digital audio sources. Its
three digital inputs (optical/coaxial/USB) support sampling rates of 32, 44.1,
48, 88.2, 96, 176.4, and 192kHz. It's ideal for playback of FLAC, WAV, Apple
Lossless, and other high-resolution file formats. It is capable of 32-bit
processing and even has the capacity to process 2.8/5.6MHz DSD data, for
faithful and accurate playback of high-resolution sound sources.
Asynchronous USB Input: The TEAC AI-301DA features a USB
(type-B) port for connecting your Windows PC or Mac computer. The AI-301DA accepts
digital audio source material stored on your computer at up to 32-bit/192kHz.
When receiving digital audio signals from a computer via USB cable, the unit can
operate in asynchronous mode, controlling the timing of the input signal using
the AI-301DA's internal clock. With asynchronous transmission over USB, signal
compromising jitter is effectively eliminated, allowing digital audio signals to
be transmitted in a pure, unadulterated state. This allows optimal playback of
high-resolution digital audio files from playlists/libraries in your iTunes,
Windows Media Player, or similar playback programs on your computer.
Note: Compatible with Windows XP (32-bit), Vista
(32/64-bit), 7 (32/64-bit), 8 (32/64-bit), and 8.1 (32/64-bit); Windows
computer will also require the installation of a dedicated
USB driver. Compatible with Macintosh OS X Snow Leopard (10.6), OS X
Lion (10.7), OS X Mountain Lion (10.8), OS X Mavericks (10.9); no additional
driver required for Macintosh computers.
HR Audio Player App (for Windows & Mac): The
TEAC HR Audio Player is a free application software download to help you
playback and enjoy your high-resolution audio files on your Windows or Mac
computer with ease through the TEAC AI-301DA and connected speakers.
The TEAC HR Audio Player allows you to listen to your audio as soon as you
connect the TEAC AI-301DA and install the application; simply drag-and-drop the
music files on your computer into the window of the application. Various
high-resolution audio files formats are supported, including DSD
(2.8MHz/5.6MHz), PCM (44.1-192kHz; 16-32-bit), and FLAC (44.1-192kHz;
16-32-bit), plus compressed music files like MP3 (32-320kbps). You can even
choose between ASIO2.1 and DoP (DSD over PCM) modes when playing back DSD files
from your Windows PC. In order to maximize the connected unit's performance, a
simplified screen of the TEAC HR Audio Player helps reduce CPU load time while
data processing. Furthermore, the RAM Buffer Playback mode that stores the
audio data onto the internal memory is supported for the ultimate digital audio
playback conditions. Additional features include Playlist, Repeat, and Shuffle
Note: Compatible with Windows XP (32-bit), Vista
(32/64-bit), and 7 (32/64-bit). Compatible with Macintosh OS X Lion (10.7)
Optical & Coaxial Digital Inputs: The TEAC AI-301DA is
fitted with optical (toslink) and coaxial (RCA) digital inputs for connection of
other digital audio sources like your CD/SACD, Blu-ray/DVD player, or network
player. These digital inputs will accept two channel linear PCM (not Dolby
Digital/DTS). The coaxial digital input supports 32, 44.1, 48, 88.2, 96, 176.4,
and 192kHz sampling frequencies (16- or 24-bit). The optical digital input
supports only 32, 44.1, 48, 88.2, and 96kHz sampling frequencies (16-or 24-bit).
Analog Inputs: The TEAC AI-301DA features two sets of stereo
RCA inputs for connecting an external analog audio source, such as your CD
player, Tuner, or Tape Deck.
Built-in Bluetooth w/ aptX: The TEAC USB DAC amplifier features
built-in Bluetooth (version 2.1 + EDR) with support for A2DP, AVRCP, and aptX. You'll
be able to stream stored music and music apps from your Bluetooth-enabled Apple
iPod/iPhone, iPad, Android smartphone/tablet, Windows PC, Mac computer, or other
Bluetooth-compatible devices to the TEAC AI-301DA. You'll also be able to
control basic music playback functions (Play/Pause & Previous/Next Track) from
the included IR remote. The USB DAC amplifier evens employs aptX audio coding
technology for lossless, CD-quality streaming with compatible AptX-compatible
phones (like some Androids). Up to 8 devices can be paired with the AI-301DA,
but only one device can be used at a time.
Note: Due to the differences in Bluetooth technology, some
Bluetooth enabled devices may be incompatible, function improperly, or may not
support all features when used with the TEAC AI-301DA.
Binding-Post Speaker Terminals: The TEAC AI-301DA USB DAC amplifier is
equipped with four binding-post speaker terminals to connect a pair of
loudspeakers (4-8Ω). The binding-post speaker
terminals will accept bare wire (up to 8AWG), spade-connectors, pin-connectors,
and banana plugs (single or dual).
Note: Combine the AI301-DA USB DAC amplifier with TEAC's LS-301 coaxial
loudspeakers (sold separately). The LS-301 speakers have been specifically developed to match
the AI301-DA to create a system that does full
justice to any high-resolution audio source.
Sub Output: The TEAC USB DAC amplifier is fitted with a single
mono-RCA output for connecting a powered subwoofer. There is no built-in
crossover in the AI301-DA. You will need to use the built-in low-pass crossover
of your powered sub.
Headphone Amplifier: The TEAC AI-301DA features a built-in
headphone amplifier and front-panel 1/4" headphone jack that will accept
headphone impedances from 8 to 600-ohms. The 100mW + 100mW output (at 32-ohms
load) headphone amplifier uses CCLC (Coupling Capacitor Less Circuit)
technology. In conventional headphone output circuits, a capacitor is used for
output-stage coupling, and so the sound is unavoidably colored. When the
capacitor is combined with a high-pass filter this often results in phase lags,
or low frequency level degradation. With CCLC the negative impact of capacitors
on sound quality is eliminated, providing full low-frequency sound and a
responsive headphone listening environment with great spatiality.
Remote Control: The TEAC USB DAC amplifier comes with a IR remote for
wireless operation of the AI-301DA. The remote offers Power, Volume, Input, and
All-Metal Chassis: The TEAC AI-301DA features a compact
chassis with aluminum panels and a motor-driven volume knob with the tactile
feel you'd expect from controls found in high end full-size hi-fi components.
The solid all-metal chassis is impressively inert, minimizing the effects of
vibration on the unit's sound quality.
Auto Power On: The AI-301DA has an Auto Power On function which
automatically switches on the amplifier's power when it senses a digital signal
input. When the amplifier is connected to optical digital audio output from a
television set, just switching on the television turns on the power of the
AI-301DA, enabling you to immediately enjoy high-quality sound without having to
adjust any other settings. This facility makes life very convenient allowing you
to switch on the TV and instantly listen to music or a soundtrack.
Auto Power Down: If there is not signal from the selected input source
and no operation has occurred for approximately 30 minutes, the USB DAC
amplifier will enter standby mode. Power consumption in standby mode is 0.5W or