Description

Effortlessly fill any living space with the power of incredible, true stereo sound that brings your listening experience to life. An all-access pass to ALL of your music on any app or device, the HD4 offers wired or wireless connections including USB input from your computer, Bluetooth aptX-HD from your phone, or good old analog from that vintage turntable or prized tape deck.

Features

MADE FOR YOUR MUSIC

INSPIRED BY THE WAY YOU LISTEN

Rounding out Audioengine’s legacy HD-series, HD4 wireless speakers offer versatile, high-fidelity audio ideal for smaller spaces. A premium-powered, two-speaker setup that offers excellent music reproduction and surrounds you with a sense of presence that most compact systems often miss.

Bringing home the high-performance technology inside our HD6 along with the convenience of our modestly-sized HD3, the HD4 is a perfect blend of the power you love to feel and the modern functionality you depend on. Thoughtfully wrapped in precision-tuned, hand-built wood-veneer cabinets.

PLAY YOUR MUSIC, YOUR WAY

CONNECT TO YOUR MUSIC NO MATTER WHERE IT LIVES

An all-access pass to ALL of your music on any app or device, the HD4 offers wired or wireless connections including USB input from your computer, Bluetooth aptX-HD from your phone, or good old analog from that vintage turntable or prized tape deck.

Featuring Bluetooth aptX-HD for premium, extended-range wireless that allows for quick and easy connection to stream your existing music services, tune into your favorite podcast or listen to those carefully curated playlists from your personal music library.

Your music, your way. Anywhere you want to listen. It’s that simple.

BOLD DESIGN THAT FITS IN

VERSATILE, SIZE-DEFYING SOUND

Designed to take on space limitations, the HD4 is the perfect upgrade where surfaces are minimal but performance and convenience can’t be compromised. As handsome as they are compact, the HD4 will easily fit in any small living space and blend in with any decor.

Purpose-built for versatility, the HD4’s modest design does little to prepare listeners for such expansive soundstage and crystal-clear imaging. The difference between listening to your music and hearing ALL of it...with more room for dancing.

WHY YOU’LL LOVE THEM

BENEFITS AND FEATURES

Quick and easy setup
Versatile playback in any room, from any device
True high-resolution stereo sound
Thoughtful, compact design that fits in and fills up any room
High-definition, extended-range wireless aptX Bluetooth.
Modest price point without sacrificing quality
Aramid fiber woofers and silk dome tweeters
Built-in power amps wrapped in precision tuned, hand-crafted cabinets

BONUS: The Audioengine HD4 is the smart choice in home speakers without being a “smart speaker.” Experience agenda-free audio and feel confident knowing you’re the only one doing the listening.

Sorry, Alexa and Siri, we’re in the business of listening to music, not listening to your business.

AUDIOENGINE SIGNATURE SOUND

In 2005, Audioengine was founded on a simple goal: Design purpose-built home music systems that sound great, are easy to use, and make people want to listen to music every day.

Each new product gives listeners well-thought updates and improvements inspired by all the ways people listen to their music. The HD4 is no exception. Constructed with similar custom components found in the award-winning HD6 and HD3, the HD4 boasts everything you’d expect from an Audioengine product reimagined for the space-conscious music lover.

Audioengine - Accessible, adaptable and absolutely incredible home audio for anyone who believes in the power of music.

QUESTIONS & ANSWERS

How easy is it to set up HD4?

HD4 is an all-in-one system with no extra components needed except your phone or computer. Simply place the speakers where you want them and connect the power supply. Hook up the included speaker wire from the powered left speaker to the right passive speaker. Then connect your music with the supplied cables - or go wireless - and that's it.

Does HD4 come with speaker grills?

The HD4 speakers do include detachable magnetic grills. The grills have thin rubber pads to prevent marks or damage to the finish or the cabinet, so your HD4s will keep looking great even if you like to remove / replace them frequently!

Can I use the HD4 with tablets or smartphones like Samsung Galaxy or Microsoft Surface?

Absolutely! The HD4 offers wired or wireless connections to any phone or tablet using the aux audio input or Bluetooth aptX-HD. For wired connections to newer devices without a headphone jack, you'll need the correct USB-A adapter cable to connect from your tablet to the USB input on the HD4. These are generally available from the manufacturer of your tablet/smartphone, local electronic stores, or even online retailers.

Can I take my Audioengine HD4 speakers to another country with a different voltage?

Yes, you can. The HD4 speakers use a switching power supply so it will automatically convert to the different voltage. The power cable is also detachable which makes it convenient to replace the AC plug with a different type if you don’t want to use an adapter plug.

Can I use an inverter with my HD4 speakers?

Sure, for HD4 you will need an inverter that can supply about 50-60 watts.

The HD4 has a built in USB digital-to-analog converter (DAC), but can I also use a different DAC?

While the HD4 has a fantastic 24-bit DAC, you can always run your own external DAC to the speakers by connecting to the analog inputs.

If I connect my turntable to the HD4 will it be necessary to purchase a phono preamp or can I simply connect the turntable directly to the HD4 input?

Some turntables will need a preamp before being connected and others may have one built-in. Check the turntable manufacturer’s website or user manual.

Is it possible to connect multiple sources to the HD4 simultaneously?

Yes! All Audioengine powered speakers have multiple audio inputs. Both analog inputs (3.5mm and RCA) are active, so you can connect multiple audio sources at the same time.

The digital inputs are slightly different, though. Both the Bluetooth and USB inputs share an internal DAC. In this case, the Bluetooth input will take precedence over the USB connection. This means that the Bluetooth input will mute the USB input's audio playback. Simply disconnect your Bluetooth device from the HD4 speakers to resume playback from your USB source device.

Can I connect multiple sources to the HD4? Can I stream via Bluetooth and use the USB input at the same time?

You should be able to use multiple sources with the HD4s just fine. The analog inputs on the HD4 are always active. They will play at the same time as the Bluetooth or USB input. Bluetooth and USB share the DAC though, so you can only listen to one at a time, and Bluetooth takes priority. If you're using USB for example, and start using Bluetooth, USB will mute and Bluetooth will take over. If you pause or disconnect from Bluetooth the speakers will automatically switch back to USB after a few seconds.

Should I use the volume control on the front of the HD4 or can I adjust from system volume on my computer?

If the left speaker is in an easy to reach location, you can certainly use the physical knob to set volume. If not though, we generally recommend setting the HD4 at around 50% and adjusting from source.

Videos

Specifications

GENERAL SPECIFICATIONS

Type: Powered Bluetooth aptX HD speaker system

Amplifier Type: Class AB

Power Output: 120 W peak power total (30 W RMS / 60 W peak per channel), AES

Drivers: 4″ aramid fiber woofers, 0.75″ silk dome tweeters

Inputs: 3.5 mm stereo mini-jack, USB, RCA L/R, Bluetooth

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

Input Voltages: 110-240 V 50/60 Hz auto-switching

SNR: >95 dB (typical A-weighted)

THD+N: <0.05% at all power settings Crosstalk, <50 dB Frequency Response, 60 Hz-22 kHz ±1.5 dB

Frequency Response w/ Bass Reduction Switch selected: N/A

Analog Input Impedence: N/A

Nominal Impedence: N/A

Input Impedence: 5K ohms unbalanced

Crossover Frequency: N/A

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

Power Consumption: Idle: 10W

Standby Consumption: N/A

Phase: N/A

Recommended Amplifier Power: N/A

Battery Life: N/A

Battery Charge Time: N/A

BLUETOOTH SPECIFICATIONS

Internal D/A Converter: PCM 5102

Internal BT Receiver: N/A

Input Bit Depth: 24 bit (padded)

Bluetooth Receiver Type: Bluetooth 5.0

Supported Codecs: aptX HD, aptX, AAC, SBC

Supported Bluetooth Profiles: N/A

Wireless Operation Range: Up to 100 ft (30 m) typical

Input Data Rate: Determined by Bluetooth

Wireless Latency: ~30 milliseconds (ms)

USB SPECIFICATIONS

Connector Type: Micro-USB

USB Device Class: USB 1.1 or above

Input Bit Depth: 24 bit (padded)

Input Sample Rate: 44.1 kHz/48 kHz

HEADPHONE AMP SPECIFICATIONS

Headphone Amp Type: OPA2134

Full-scale Headphone Output Level: 2.0 V RMS

Output Impedence: 2 ohms

Recommended Headphone Impedence Level: 10 ohms to 10K ohms

OPTICAL SPECIFICATIONS

Internal D/A converter: N/A

Input Bit Depth: N/A

Input Data Rate: N/A

WEIGHTS AND MEASURES

Dimensions (HWD): Each speaker – 9″(23 cm) x 5.5″ (14 cm) x 6.5″ (16.5 cm)

Weight: Left (active) – 7.2 lb (3.3 kg), Right (passive) – 5.4 lb (2.4 kg)

Total Shipping Weight: 10 lb (4.6 kg)

Shipping Box Dimensions (LWH): 20″ (51 cm) x 13″ (33 cm) x 15.5″ (39 cm)

ENVIRONMENTAL REQUIREMENTS

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

MATERIALS AND CONSTRUCTION

0.7″ (18 mm) thick MDF cabinets with real wood veneer
0.75″ (20 mm) silk dome tweeters with neodymium magnets
4″ (101 mm) aramid fiber woofers with advanced voice coils

CABINETS

To minimize unwanted resonances and distortion, Audioengine cabinets have thick high-resin MDF walls with extensive internal bracing. Heavy internal sound-damping material is used to reduce unwanted sound reflections inside the cabinet. All cabinet edges are rounded which look great and reduce high-frequency diffraction effects on the front baffles. The P4 cabinet contains tuned, front-port slots.

FURNITURE GRADE FINISHES

The HD4 cabinets are available in several handsome finishes, including walnut veneers as well as satin black paint, offering options 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.

CUSTOM COMPONENTS

Audioengine designs and manufactures our own tweeters, woofers, and other critical components. In other words, these are not “box built” speakers with off-the-shelf parts but custom-designed to our specifications. What we do not fabricate directly in our factory we have made to our designs (parts such as transformers, magnets, and wiring harnesses, for example). The cabinets, drivers, bass port designs, amplifiers, and crossovers are all painstakingly tuned together for each Audioengine model. This, in turn, makes for a much more efficient system that requires much less power than passive speakers and a separate integrated amplifier or similar A/V components.

BASED ON STUDIO MONITOR DESIGNS

Studio monitor speakers are used by producers and engineers in recording and production studios. They are designed with a theoretical flat frequency response which allows the engineer to create a final mix in such a way that the recorded music will sound good on most other speakers. Although Audioengine speakers are not designed to be up-close “nearfield” studio monitors, we do carry over much of the same higher-end technology, components, and design philosophy for all Audioengine speaker systems.

EFFICIENT INTEGRATED DESIGN

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.

HIGH-QUALITY BLUETOOTH AUDIO

The Bluetooth built into the HD4 powered speakers features aptX HD coding which is an advanced Bluetooth audio codec with very impressive sound. And even if your phone or tablet does not have aptX HD, the HD4 Bluetooth solution is backwards-compatible with SBC and AAC codecs, as well as standard aptX, so you can wirelessly stream music from any Bluetooth-enabled device and still enjoy all your music. High-fidelity Bluetooth aptX HD that really works and sounds great. Here is why:

Extended-range wireless.

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 HD4 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 bit, 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 bit as well as the added benefit of onboard triple redundancy power source conversion and filtering the HD4 Bluetooth implementation presents impressive low noise and low distortion characteristics with a noticeable improvement over other Bluetooth devices.

USB POWER

The Audioengine HD4 includes a 5V, 500mA USB power supply for charging portable devices, while listening to your music. The USB connector allows you to charge and power your Smartphone, Tablet, Audioengine wireless adapters or any other USB powered product. USB is for power only, not USB audio or data transfer.

HD3 HEADPHONE AMPLIFIER

The HD4 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.

AMPLIFIER DESIGN

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.

DRIVER DESIGNS

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 aramid fiber woven glass composite with rubber surrounds. Aramid fiber is obviously very strong, which means the woofer retains its shape when being driven at high levels.

POWER TRANSFORMERS SHIELDING

Both drivers are directly video shielded and allow the user to place the speakers within a few inches of a video monitor. This shielding also offers protection for hard-drive digital music players.

In The Box

1 x HD4 Home Music System powered (left) speaker
1 x HD4 Home Music System passive (right) speaker
1 x Antenna
1 x Speaker wire (16AWG), 2 meters (~6.5 ft)
1 x AC power cord
1 x USB cable, 1.5 meters (~4.9 ft)
1 x Mini-jack audio cable, 2 meters (~6.5 ft)
1 x RCA audio cable, 2 meters (~6.5 ft)
2 x Cloth speaker bags
1 x Cloth cable bag
1 x Setup guide

Additional Information

Condition	New
Release Date	April 2024
Weight (kg)	7.250000
Product Type	Speakers
Platform	PC, Android, iOS, Mac
Barcode	852225007193
Manufacturer	Audioengine
Connectivity / Sockets	Wireless, Bluetooth, USB, 3.5mm Jack
Item Code	174592