Short answer: the KEF LS50 Wireless II. It ranks #19 of 108 powered bookshelf speakers by sound quality, rated 4.3/5, at $2,999.99. The ADAM Audio A4V ranks #67, rated 3.6/5, at $1,079.98, $1,920.01 cheaper, not enough of a saving to outweigh the sound-quality gap.
What the ADAM Audio A4V does well: A compact studio monitor with onboard DSP, placement controls and room correction support for tricky rooms. The catch: A small average-deviation figure hides a major localized response irregularity: the selected measurement spans 10.8dB from 300Hz to 5kHz, and listening-window narrow-band deviation is 0.547.
The KEF LS50 Wireless II is the more accurate choice. An all in one wireless stereo system with accurate, consistent sound, HDMI eARC and built in streaming. Its measured preference score, a predictor of how neutral it sounds, is 5.43 against 3.92 for the ADAM Audio A4V. It keeps a wired aux input, which the ADAM Audio A4V lacks. The tradeoff: The 3.0dB response span is good but not reference-leading, and dispersion still varies with frequency.
Buy the KEF LS50 Wireless II. It is rated higher for sound quality, and the $1,920.01 saving on the ADAM Audio A4V is not enough to make up the difference.
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A compact studio monitor with onboard DSP, placement controls and room correction support for tricky rooms.
An all in one wireless stereo system with accurate, consistent sound, HDMI eARC and built in streaming.
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Specifications Side By Side
| ADAM Audio A4V | KEF LS50 Wireless II | |
|---|---|---|
| Price | $1,079.98 per pair | $2,999.99 per pair |
| Ranked | #67 of 108 in Medium Size Powered Bookshelf Speakers | #19 of 108 in Medium Size Powered Bookshelf Speakers |
| Enclosure | 2-way active, dual front ports | - |
| Drivers | X-ART folded-ribbon tweeter, 4” MLM woofer | Uni-Q coincident array: 130mm aluminum woofer + 25mm MAT aluminum dome tweeter |
| Dimensions | 10.6H x 6.2W x 8.7D in | 12” x 7.9” x 12.2” (305 x 200 x 311 mm) each |
| Weight | 12.8 lbs (5.8 kg) each | 44.3 lbs (20.1 kg) for the pair |
| Amplifier Power | 130W RMS each | 280W (LF) + 100W (HF) per speaker, bi-amped |
| Inputs | XLR and RCA; Ethernet for control | HDMI eARC, optical, digital coaxial, 3.5mm analog, USB-A (service), Ethernet |
| Spinorama Preference Score | 3.92 | 5.43 |
| Spinorama Preference Score with Perfect Sub | 6.33 | 7.51 |
| XLR Input | Yes | No |
| RCA Input | Yes | No |
| TRS Input | No | No |
| Optical Input | No | Yes |
| Coaxial Input | No | Yes |
| USB Input | No | No |
| HDMI Input | No | Yes |
| AES Input | No | No |
| Aux Input | No | Yes |
| Bluetooth | No | Yes |
| Frequency Response | 58Hz - 41kHz (-3dB) (Manufacturer specified) | 45Hz - 28kHz ±3dB |
| Bass Extension (-10dB) | - | 41.5Hz (measured, spinorama.org) |
| Bass Extension (-3dB) | - | 51.3Hz (measured, spinorama.org) |
| App | - | KEF Connect (placement EQ presets, source selection, firmware updates) |
| Bluetooth Version | - | 4.2 |
| EQ | - | Yes, fixed placement presets (desk/bookshelf/wall-mount) - no automatic room correction |
| Maximum SPL | - | 108dB at 1m (manufacturer specified) |
| Subwoofer Output | - | Yes |
| Outputs | - | RCA subwoofer |
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