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HD4 Powered Bluetooth Speakers - Walnut

SKU sp-740

mid-sized hifi speakers w/ analog, USB + wireless, twice the power of HD3 model
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sale $399.00
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  • Lab Overview
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Lab Overview


  • mid-sized design with extra-loud output, 120W peak power
  • powered speakers w/ built-in amp, no need for amplifier
  • in terms of power + size, sits in between the full-sized HD6 + the compact HD3
  • 4" aramid fiber woofer + 0.75" silk dome tweeters w/ neodymium magnets + advanced voice coils
  • aptX Bluetooth 5.0 connectivity with expanded range, HD capable
  • upgraded PCM 5102 DAC - high quality digital converter is utilized by both Bluetooth and USB inputs
  • RCA input to connect a turntable (phono preamp may be required)
  • USB input to connect a computer
  • convenient front-panel headphone jack and volume / power knob
  • removable, magnetic speaker grills
  • 18mm thick MDF cabinets with real wood veneer + furniture-grade finish
  • all necessary cables included
  • also available in black

"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." - Audioengine


  • analog dual-class A/B amplifier
  • 120W peak power total (30W RMS / 60W peak per channel)
  • inputs: 3.5mm mini-jack, RCA L/R, USB, Bluetooth aptX
  • outputs: variable line-out RCA output, stereo mini headphone output
  • drivers: 4" Kevlar woofers, 3/4" silk dome tweeters
  • freq. response: 60Hz-22kHz ±1.5dB
  • dimensions (each): 9"h x 5.5"w x 6.5"d / 23 x 13.9 x 16.5cm
  • weight: 10 lbs (total) / 4.53 kg


  • L+R speakers
  • Bluetooth antenna
  • AC power cord
  • speaker wire, 2m (6.5 ft)
  • Mini-jack audio cable , 2m (6.5 ft)
  • RCA audio cable, 2m (6.5 ft)
  • USB cable, 1.5m (4.9 ft)
  • cloth speaker bags
  • cloth cable bag
  • setup guide
UPC: 852225007193

Review & Q+A


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