Speaker type
2.0 powered bookshelf-style speaker system featuring wireless and digital optical inputs

Power output
150W peak power total (50W RMS, 75W peak per channel)

Inputs
3.5mm mini-jack, RCA L/R, digital optical (SPDIF,) Bluetooth aptX

Outputs
Variable line-out w/2.0V RMS max output, 47ohm output impedance

Input voltages
115/240V, 50/60Hz manually-switchable

Amplifier type
Analog dual-class A/B monolithic

Drivers
5.5″ Kevlar woofers, 1″ silk dome tweeters

SNR
>95dB (typical A-weighted)

THD+N
<0.05% at all power settings

Crosstalk
-50dB

Frequency response
50Hz-22kHz ±1.5dB

Analog input impedance
48Kohms unbalanced (mini-jack and RCA inputs)

Protection
Output current limiting, thermal over-temperature, power on/off transient protection, replaceable external main fuse

Internal D/A converter
AKM AK4396

Input bit depth
24-bits upsampled

Bluetooth receiver type
Bluetooth 4.0 audio

Supported codecs
aptX, AAC, SBC

Wireless operation range
Up to 100ft (30m) typical

Input data rate
Determined by Bluetooth

Wireless latency
~30 milliseconds (ms)

Internal D/A converter
AKM AK4396

Input bit depth
up to 24-bits native

Input data rate
up to 192KS/s native

Left speaker (powered)
Dimensions: 11.75” (30cm) x 7.25” (18.5cm) x 10” (25cm)
Weight: 17.5 lbs (8kg)

Right speaker (passive)
Dimensions: 11.75” (30cm) x 7.25” (18.5cm) x 10” (25cm)
Weight: 12.5 lbs (5.5kg)

Dimensions: 17” (43cm) x 20” (51cm) x 15” (38cm)
Total weight: 33.5 lbs (15kg)

Idle: 10W
Mute: 6W
Sleep: 4W

Operating temperature: 32° to 95°F
Non-operating temperature: -4° to 113°F
Relative humidity: 5% to 95% non-condensing

Audioengine designs and manufactures our own speaker drivers and other critical components. In other words, HD6 is not a “box-built” system with off-the-shelf parts, but includes custom-designed components constructed to our specifications. What we do not fabricate directly inside our factories we have made to our specific designs – parts such as circuit boards, transformers, magnets, and wiring harnesses, for example.

The speaker cabinets, drivers, innovative bass port designs, amplifiers, and passive crossovers are all critically tuned together for each Audioengine model. This, in turn, makes for a much more efficient system that requires less power than passive speakers and a separate integrated amplifier or similar A/V components. We build all this goodness into the left speaker cabinet to make it super-easy to connect your smartphone, tablet, computer, TV, network player – or any other audio product.

We’ve taken features from two of our best-selling products, the B1 aptX® Bluetooth® Receiver and the D1 24-bit DAC, and combined some of this circuitry with advanced speaker components to achieve a complete high-end analog and digital audio system.

The Bluetooth built into the HD6 powered speakers features aptX coding which is an advanced Bluetooth audio codec with very impressive sound. And even if your phone or tablet doesn’t have aptX, the HD6 Bluetooth solution is backwards-compatible with SBC and AAC codecs, so you can wirelessly stream music from any Bluetooth-enabled device and still enjoy all your music. High-fidelity Bluetooth aptX that really works and sounds great. Here’s why:

Extended wireless range – Most Bluetooth implementations have very limited range, typically within just one room. But with careful signal management circuitry and antenna tuning, we offer a superior solution that has up to 3 times the range of standard Bluetooth for multi-room use, with no degradation in audio quality.

24-bit DAC – HD6’s Bluetooth receiver and optical input both utilize the AKM AK4396A DAC, widely known for its low-noise and high-fidelity. The optical input configures the AK4396A as a bit-perfect 24-bit DAC, which will process sample rates up to 192kHz natively. But 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. Due to the high signal-to-noise specs of the AK4396A, 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 implementation presents impressive low noise and low distortion characteristics with a noticeable improvement over other Bluetooth devices.

HD6’s 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. Also included are detachable grills that add further aesthetic advantages as they are firmly held in place with hidden neodymium magnets for a clean look.

The amplifiers in powered Audioengine speakers are located in the left speaker and are 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.

Audioengine uses audiophile-quality, ferrofluid-cooled silk dome tweeters with neodymium magnets. Silk tweeters hold up well under high power and the edge-driven design gives very smooth response. The woofers are Kevlar woven glass aramid composite with rubber surrounds. Kevlar is obviously very strong, which means the woofer retains its shape when being driven at high levels. The HD6 woofers are housed in cast aluminum frames which provide high rigidity and increased heat dispersion.

Power transformers are critical to to high-quality audio performance, especially in the low-end and again, no off-the-shelf parts. Audioengine uses gapless core toroidal transformers which have a tighter radiated magnetic field, translating to lower noise. They are lighter than standard, lower-cost “EI” transformers and also generate less heat.

Both of HD6’s speaker drivers are directly magnetically-shielded.