Short answer: the Airpulse A100 for better sound quality, the Audioengine HD4 for the lower price. The Airpulse A100 ranks #17 of 64 powered bookshelf speakers at $999.99. The Audioengine HD4 ranks #54 at $429, $570.99 cheaper.
What the Airpulse A100 offers: Horn-loaded ribbon tweeter (inherited from Airpulse’s flagship 7001 monitor, designed by Phil Jones) paired with a 5” hard-anodized aluminum cone woofer - a distinctive, low-mass driver combination rarely seen below $1,000. Directivity spread is the widest and most controlled of this batch (directivity_spdi_stddev 4.26). A full input set for a desktop system: RCA, USB, optical, coaxial, and Bluetooth, plus a dedicated subwoofer output and an included IR remote. Watch for: On-axis deviation (aad_on_axis 0.498) trails the pricier options in this group, and there’s no app-based EQ or DSP - bass/treble trim is limited to physical rear-panel knobs not reachable from the remote. The compact 5” woofer caps sub-bass extension at 63.0Hz (-3dB) / 53.2Hz (-10dB), the second-shallowest in this batch, effectively expecting an external subwoofer for full-range use. No Wi-Fi streaming (AirPlay/Chromecast) - Bluetooth only.
What the Audioengine HD4 offers: Rated 3.3 in the SpeakerRanking database. Watch for: Not a great sounding speaker for the high price.
Buy the Airpulse A100 if sound quality matters more than the price. Buy the Audioengine HD4 if the price matters more than sound quality.
If sound quality matters at all to you, skip the Audioengine HD4. It ranks near the bottom of the 64 powered bookshelf speakers, so look higher up the list instead.
Specifications Side By Side
| Airpulse A100 | Audioengine HD4 | |
|---|---|---|
| Price | $999.99 | $429.00 |
| Ranked | #17 of 64 in Medium Size Powered Bookshelf Speakers | #54 of 64 in Medium Size Powered Bookshelf Speakers |
| Bass Extension (-10dB) | 53.2Hz (measured, spinorama.org) | - |
| Bass Extension (-3dB) | 63.0Hz (measured, spinorama.org) | - |
| Inputs | RCA (aux), USB, optical, coaxial, Bluetooth aptX | Bluetooth, Aux, RCA Input |
| Drivers | Horn-loaded ribbon tweeter, 5" hard-anodized aluminum cone woofer | 4" (102mm) woofer |
| App | None (physical bass/treble knobs, IR remote) | No |
| Bluetooth | Yes (SBC, aptX) | No |
| EQ | Yes, rear-panel bass/treble trim knobs | No |
| Weight | 24.3 lbs / 11 kg (24.2 lb) each | 7.3 lbs / 3.3 kg |
| Output Power | 100W total (40W+40W woofer, 10W+10W tweeter) | 50w RMS Per Speaker |
| Dimensions | 6.3" x 11.1" x 10" (160 x 283 x 255 mm) (6.3 x 11.1 x 10.0 in) each | 9"H x 5.5"W x 6.5"D (228.6 x 139.7 x 165.1 mm) |
| Frequency Response | 52Hz - 40kHz | 60 Hz-20 kHz (-3dB) (Manufacturer specified) |
| Outputs | - | RCA Output |
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Prices on this page were last checked August 25, 2026 at 6:19 AM UTC. Product prices and availability are accurate as of that date/time and are subject to change; the price and availability shown on Amazon at the time of purchase will apply to the purchase of this product.
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The Two Speakers In Full
Airpulse A100: $999.99 Amazon B&H Photo eBay
Pros: Horn-loaded ribbon tweeter (inherited from Airpulse’s flagship 7001 monitor, designed by Phil Jones) paired with a 5” hard-anodized aluminum cone woofer - a distinctive, low-mass driver combination rarely seen below $1,000. Directivity spread is the widest and most controlled of this batch (directivity_spdi_stddev 4.26). A full input set for a desktop system: RCA, USB, optical, coaxial, and Bluetooth, plus a dedicated subwoofer output and an included IR remote.
Cons: On-axis deviation (aad_on_axis 0.498) trails the pricier options in this group, and there’s no app-based EQ or DSP - bass/treble trim is limited to physical rear-panel knobs not reachable from the remote. The compact 5” woofer caps sub-bass extension at 63.0Hz (-3dB) / 53.2Hz (-10dB), the second-shallowest in this batch, effectively expecting an external subwoofer for full-range use. No Wi-Fi streaming (AirPlay/Chromecast) - Bluetooth only.
Full Airpulse A100 review and specifications →
| App | None (physical bass/treble knobs, IR remote) |
|---|---|
| Bass Extension (-10dB) | 53.2Hz (measured, spinorama.org) |
| Bass Extension (-3dB) | 63.0Hz (measured, spinorama.org) |
| Bluetooth | Yes (SBC, aptX) |
| Dimensions | 6.3" x 11.1" x 10" (160 x 283 x 255 mm) (6.3 x 11.1 x 10.0 in) each |
| Drivers | Horn-loaded ribbon tweeter, 5" hard-anodized aluminum cone woofer |
| EQ | Yes, rear-panel bass/treble trim knobs |
| Frequency Response | 52Hz - 40kHz |
| Inputs | RCA (aux), USB, optical, coaxial, Bluetooth aptX |
| Output Power | 100W total (40W+40W woofer, 10W+10W tweeter) |
| Weight | 24.3 lbs / 11 kg (24.2 lb) each |
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Audioengine HD4: $429.00 Amazon eBay
Cons: Not a great sounding speaker for the high price.
Full Audioengine HD4 review and specifications →
| App | No |
|---|---|
| Bluetooth | No |
| Dimensions | 9"H x 5.5"W x 6.5"D (228.6 x 139.7 x 165.1 mm) |
| Drivers | 4" (102mm) woofer |
| EQ | No |
| Frequency Response | 60 Hz-20 kHz (-3dB) (Manufacturer specified) |
| Inputs | Bluetooth, Aux, RCA Input |
| Output Power | 50w RMS Per Speaker |
| Outputs | RCA Output |
| Weight | 7.3 lbs / 3.3 kg |
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