Short answer: the Kali Audio IN-UNF for better sound quality, the Audioengine HD4 for the lower price. The Kali Audio IN-UNF ranks #51 of 60 powered bookshelf speakers at $699. The Audioengine HD4 ranks #53 at $429, $270 cheaper.
What the Kali Audio IN-UNF offers: Ingenious ultra-nearfield system: a desk-mounted bass module uses two opposed 4.5-inch woofers below 280Hz, while the satellites use time-aligned 4-inch/1-inch coincident drivers. It is specifically engineered around the desk and, set up to Kali’s supplied placement template, sounded much better than it initially did to Erin; his moving-mic measurement at arm’s length closely matched the system’s predicted response. DSP provides placement, boundary and tonal trims, while USB-C, optical, 3.5mm and balanced TRS inputs cover desktop and studio sources. The round satellite enclosure avoids conventional baffle-edge diffraction, and the coaxial satellites image best aimed directly at the listener. Watch for: This is a very specialized system rather than a general desktop-speaker recommendation. The sizeable bass module must stay on the desk and prescribed satellite spacing can conflict with dual or ultrawide monitors; Erin and Joe N Tell both preferred Kali’s LP-6/IN-series alternatives for their own desks. A bump around 100-130Hz and a possible 1.2kHz diffraction feature appeared in Erin’s exploratory anechoic data, but he explicitly cautioned that those measurements do not replicate the required desk geometry. Bass falls away around 40-50Hz despite the separate bass unit. Erin did not publish comparable anechoic F3/F10, sensitivity or impedance figures because the system is designed around a fixed desk arrangement.
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 Kali Audio IN-UNF 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 both of these and look higher up the 60 powered bookshelf speakers instead.
Specifications Side By Side
| Kali Audio IN-UNF | Audioengine HD4 | |
|---|---|---|
| Price | $699 | $429.00 |
| Ranked | #51 of 60 in Medium Size Powered Bookshelf Speakers | #53 of 60 in Medium Size Powered Bookshelf Speakers |
| Drivers | Bass module: two opposed 4.5" woofers; satellites: 4" coincident midrange with 1" textile-dome tweeter | 4" (102mm) woofer |
| Output Power | 100W LF + 60W mid/HF per channel (continuous) | 50w RMS Per Speaker |
| Inputs | USB-C, optical, 3.5mm, balanced TRS | Bluetooth, Aux, RCA Input |
| Bass Extension (-3dB) | 47Hz (manufacturer specified; Erin did not publish an anechoic F3) | - |
| Bass Extension (-10dB) | 39Hz (manufacturer specified; Erin did not publish an anechoic F10) | - |
| Frequency Response | 47Hz - 21kHz +/-3dB (manufacturer specified) | 60 Hz-20 kHz (-3dB) (Manufacturer specified) |
| Crossovers | 280Hz LF-to-midrange; 2.8kHz midrange-to-HF | - |
| Dimensions | Bass module: 11.6"H x 19.4"W x 5.25"D; satellites: 6.25" diameter | 9"H x 5.5"W x 6.5"D (228.6 x 139.7 x 165.1 mm) |
| Max SPL | 103dB peak at 1m (manufacturer specified) | - |
| DSP | Yes (placement/boundary and tonal trims) | - |
| Bluetooth | No | No |
| Outputs | - | RCA Output |
| Weight | - | 7.3 lbs / 3.3 kg |
| App | - | No |
| EQ | - | No |
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Prices on this page were last checked August 24, 2026 at 6:53 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
Kali Audio IN-UNF: $699 Kali Audio eBay
Pros: Ingenious ultra-nearfield system: a desk-mounted bass module uses two opposed 4.5-inch woofers below 280Hz, while the satellites use time-aligned 4-inch/1-inch coincident drivers. It is specifically engineered around the desk and, set up to Kali’s supplied placement template, sounded much better than it initially did to Erin; his moving-mic measurement at arm’s length closely matched the system’s predicted response. DSP provides placement, boundary and tonal trims, while USB-C, optical, 3.5mm and balanced TRS inputs cover desktop and studio sources. The round satellite enclosure avoids conventional baffle-edge diffraction, and the coaxial satellites image best aimed directly at the listener.
Cons: This is a very specialized system rather than a general desktop-speaker recommendation. The sizeable bass module must stay on the desk and prescribed satellite spacing can conflict with dual or ultrawide monitors; Erin and Joe N Tell both preferred Kali’s LP-6/IN-series alternatives for their own desks. A bump around 100-130Hz and a possible 1.2kHz diffraction feature appeared in Erin’s exploratory anechoic data, but he explicitly cautioned that those measurements do not replicate the required desk geometry. Bass falls away around 40-50Hz despite the separate bass unit. Erin did not publish comparable anechoic F3/F10, sensitivity or impedance figures because the system is designed around a fixed desk arrangement.
Full Kali Audio IN-UNF review and specifications →
| Bass Extension (-10dB) | 39Hz (manufacturer specified; Erin did not publish an anechoic F10) |
|---|---|
| Bass Extension (-3dB) | 47Hz (manufacturer specified; Erin did not publish an anechoic F3) |
| Bluetooth | No |
| Crossovers | 280Hz LF-to-midrange; 2.8kHz midrange-to-HF |
| DSP | Yes (placement/boundary and tonal trims) |
| Dimensions | Bass module: 11.6"H x 19.4"W x 5.25"D; satellites: 6.25" diameter |
| Drivers | Bass module: two opposed 4.5" woofers; satellites: 4" coincident midrange with 1" textile-dome tweeter |
| Frequency Response | 47Hz - 21kHz +/-3dB (manufacturer specified) |
| Inputs | USB-C, optical, 3.5mm, balanced TRS |
| Max SPL | 103dB peak at 1m (manufacturer specified) |
| Output Power | 100W LF + 60W mid/HF per channel (continuous) |
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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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- Reviews, Comparisons and Sound Samples
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