Two-Way Speaker Design: Each of the Audioengine HD6 speakers
has two drivers; a 1" silk dome tweeter & a 5.5" Kevlar woofer. The HD6 provides
a real, natural sound the way the artist intended. The HD6 has a frequency
response of 50Hz to 22,000Hz (+/-1.5dB)
- Silk Dome Tweeters: Audioengine uses
audiophile-quality, ferro-fluid cooled silk dome tweeters with neodymium
magnets. Silk tweeters hold up well under high power & the edge-driven
design gives very smooth response.
- Kevlar Woofers: The woofers are made of Kevlar woven
glass aramid composite with rubber surrounds. Kevlar is very strong, which
means that the woofer retains its shape when being driven at high levels.
The woofers are housed in cast aluminum frames which provide high rigidity
and increased heat dispersion.
Built-in Amplifier: The 50W x 2ch amplifier in the Audioengine HD6 is
located in the left speaker and is a conservatively-rated class A/B analog
monoblock design. This is a more traditional speaker/amplifier marriage which
provides excellent quality audio and greater flexibility. All circuit boards for
the power and preamp sections are vertically mounted for maximum mechanical
shock protection. The built-in power amplifier saves space & eliminates the need
to connect Audioengine HD6 to a stereo receiver or external power amp. Simply
plug the left speaker into an AC outlet & connect the included 13' speaker wire
from the left speaker's binding-post terminal to right speaker's binding post
terminals. All internal components of the HD6 are tuned together, providing a
more efficient system requiring less power than passive speakers & external
Bass Reflex MDF Cabinet: One of the reasons the Audioengine
HD6 has such great bass response for a compact speaker is its slot-ported
cabinet. Each cabinet features a rear-firing slot-port that has been
specifically tuned for accurate bass down to 50Hz. The result is incredible low
end with minimal audible air turbulence, so you can use the Audioengine HD6
speakers with or without a separate subwoofer. The cabinets are built using
thick MDF with internal bracing. Internal sound-damping material reduces
unwanted reflections inside the cabinet. The cabinet edges are rounded to reduce
high-frequency diffraction effects on the front baffles. The speakers are hand
finished, then tuned and tested together to be sold in matching pairs. Also included are detachable grills that add further aesthetic
advantages as they are firmly held in place with hidden neodymium magnets for a
Note: The HD6 cabinets are available in several handsome
finishes, including walnut and cherry veneers as well as satin black paint,
offering a wide choice for complementing room furnishings.
24-Bit/192kHz DAC: The HD6 employs an AKM 24-bit DAC (AK4396A),widely
known for its low-noise and high-fidelity. The optical input of the HD6 utilizes
the AK4396A as a bit-perfect 24-bit DAC, which will process sample rates up to
192kHz natively. For Bluetooth, the AK4396A is used as an upsampling DAC and
will pad all bit depths to 24-bits, achieving a higher signal-to-noise ratio and
lower noise floor.
Bluetooth Music Streaming The Audioengine HD6 incorporates built-in
Bluetooth (version 4.0) for wireless music streaming of stored music and music
apps on your Bluetooth-enabled Apple iPod/iPhone/iPad, Android
smartphone/tablet, Windows PC/Phone, Mac computer/laptop, and more to the
powered speaker system. You will continue to control your music and view
song/artist information from your Bluetooth-enabled device.
- SBC, AAC, & aptX Codecs: The HD6 powered speakers feature aptX
coding (for Android) which is an advanced Bluetooth audio codec with
"CD-quality" like sound. And even if your phone or tablet doesn't have aptX,
the HD6 Bluetooth solution is backwards-compatible with SBC and AAC (for
iPhone) codecs, so you can wirelessly stream music from any
Bluetooth-enabled device and still enjoy all your music.
- Upsampling DAC: Due to the high signal-to-noise specs of the
HD6's AKM DAC, the fact that digital signal is upsampled to 24-bits, as well
as the added benefit of onboard triple redundancy power source conversion
and filtering, the HD6 Bluetooth receiver presents impressive low noise and
low distortion characteristics with a noticeable improvement over many other
- 100' Wireless Range: Most Bluetooth products have very
limited range (only up to 30'), typically within just one room. But with
careful signal management circuitry and antenna tuning, the HD6 offers a
superior solution that has up to 3x the range (up to 100') of standard
Bluetooth for multiroom use, with no degradation in audio quality.
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 Audioengine HD6.
Optical Digital Input: The Audioengine HD6 is fitted with a optical
(toslink) digital input for connection of a digital audio device, like your
Blu-ray player, gaming system, or TV. The optical digital input supports up to
24-bit/192 kHz PCM stereo.
Dual Aux Inputs: The HD6 is equipped with two analog Aux inputs. There is a
stereo minijack (3.5mm) input and a stereo RCA input for connecting analog audio
Variable Audio Output: The Audioengine HD6 includes a
variable stereo preamp audio output so you can connect a powered subwoofer (such
S8; sold separately), other Audioengine powered speakers, or an Audioengine
wireless adapter (772W3;
sold separately) to daisy-chaining music to other systems around the house. This
output is variable (adjustable) so the volume level can be controlled from the
HD6 or remote control.
Simple Controls: The HD6 features a front-mounted volume
control and a rear-mounted power on/off switch. It also comes with an IR remote for wireless operation
of the powered speaker system. Remote control functions include Power on/off,
Volume up/down, and Mute.
Toroidal Transformers: Power transformers are a large
contributor to the overall audio performance, especially in the low end (bass
response). Audioengine uses gapless core toroidal transformers which have a
tighter radiated magnetic field, directly translating to lower noise. They are
lighter than standard, lower-cost "EI" transformers and also generate less heat.
Placement: For the best soundstage & imaging, the speaker
should be equidistant from the side walls & and a different distance from rear
walls. Both speakers should also be equidistant from your primary listening
position and at least 6' apart. Tweeters should be at approximately eye-level
in your most frequent listening locations. For the best bass response,
Audioengine recommend at least 6" of clearance between the rear of the speakers
and the wall behind them.
Break-in Period: The speaker will sound great out of the box
& will get better over time. No need to do anything else, but listen to them. Do
give them at least 30-50 hours of break-in time before doing any critical