Type
2.0 powered multimedia speaker system

Amplifier type
Dual analog class A/B monolithic

Power output
60W peak power total (15W RMS / 30W peak per channel), AES

Drivers
2.75″ Kevlar woofers, 3/4” silk dome tweeters

Inputs
3.5mm stereo mini-jack, stereo RCA, USB, Bluetooth

Outputs
RCA variable line-out, 3.5mm mini-jack headphone out

Mains voltages
110-240V 50/60Hz auto-switching

SNR
95dB (typical A-weighted)

THD+N
<0.05% at all power settings

Crosstalk
<50dB

Frequency response
65Hz-22kHz ±2.0dB

Freq. response w/bass reduction switch selected
100Hz-22kHz ±2.0dB (-5dB down)

Input impedance
5K ohms unbalanced

Headphone amp type
OPA2134

Full-scale headphone output level
2.0V RMS

Output impedance
2 ohms

Recommended headphone impedance range
10 ohms to 10K ohms

Internal D/A converter
PCM 5102

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)

Connector type
Micro-USB

USB device class
USB 1.1 or above

Internal D/A converter
PCM 5102

Input bit depth
24-bits, upsampled

Input data rate
44.1KHz/48KHz

Protection
Output current limiting, thermal over-temperature, power on/off transient protection

Dimensions (each)
7”(H) x 4.25”(W) x 5.5”(D)

Weight (LEFT speaker)
1.8Kg/4lbs

Weight (RIGHT speaker)
1.5Kg/3.4lbs

Shipping weight
4.5kg/10lbs per pair

Shipping box dimensions
11.6 (29.5cm)H x 11.75 (30cm)L x 8.8(22.5cm)W

Materials and construction
18mm thick MDF cabinets with real wood veneer
3/4″ (20mm) silk dome tweeters with neodymium magnets
2.75″ Kevlar woofers with advanced voice coils

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, the HD3 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 HD3 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 HD3 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 – The HD3 Bluetooth receiver and USB input both utilize the PCM 5102 DAC, widely known for its low-noise and high-fidelity. The PCM 5102 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 PCM 5102, 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 HD3 Bluetooth implementation presents impressive low noise and low distortion characteristics with a noticeable improvement over other Bluetooth devices.

The HD3 contains a high-performance headphone amplifier based on the OPA2134 low-noise opamp. This amp is able to provide low-impedance, high-fidelity audio and a 2-volt output which easily drives a wide range of headphones.

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 configuration 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 HD3 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.

Both of HD3’s speaker drivers are directly magnetically-shielded.