HD4 Home Music System (Refurbished)


HD4 Home Music System (Refurbished)

w/ Bluetooth aptX-HD

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.

Connection Types:
BluetoothAux Analog InAnalog InUSB DACSubwoofer OutHeadphone
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  • 30-day audition & easy returns
  • 3-year warranty & superior support
  • Guaranteed smiles
  • bluetooth
    Extended-Range Wireless aptX-HD Bluetooth
  • USB Audio Input
  • Dual Analog Audio Inputs
  • Silk Dome Tweeters
    Silk Tweeters & Aramid Fiber Woofers
  • Subwoofer Output
    Subwoofer Output

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.



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.


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.



Quick and easy setup
No network setup, no passwords, no hassle
Versatile playback in any room, from any app or device
High-fidelity stereo sound for desktops and small spaces
Modern, compact design that fits in and fills up any room
Low-latency Bluetooth aptX-HD, extended-range wireless streaming
Analog input for easy turntable connection
Aramid fiber woofers and silk dome tweeters
Built-in power amps wrapped in precision tuned, hand-built and finished wood-veneer 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.

What's in the Box

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

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.

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Additional information

Weight 15.0 lbs
Dimensions N/A

Satin Black, Walnut