Short answer: the Vanatoo Transparent Zero Plus. It ranks #46 of 108 powered bookshelf speakers by sound quality, rated 3.9/5, at $499.99; the ADAM Audio A4V ranks #67, rated 3.6/5, and costs $1,079.98, so there is little reason to consider the other one.
Why pick the ADAM Audio A4V: A compact studio monitor with onboard DSP, placement controls and room correction support for tricky rooms. The tradeoff: 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 case for the Vanatoo Transparent Zero Plus: A compact desktop pair with an even midrange, Bluetooth and USB inputs, and automatic subwoofer crossover. It keeps a wired aux input, which the ADAM Audio A4V lacks. Watch for: The measured -3dB point is around 95Hz, with a much lower F10 in the original review; this is not flat bass to the low-50Hz region.
Buy the Vanatoo Transparent Zero Plus. It is rated higher for sound quality than the ADAM Audio A4V and costs less, which makes it the one to get unless you need something the other one does better.
Looking for alternatives? See the complete Powered Home rankings.
A compact studio monitor with onboard DSP, placement controls and room correction support for tricky rooms.
A compact desktop pair with an even midrange, Bluetooth and USB inputs, and automatic subwoofer crossover.
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Specifications Side By Side
| ADAM Audio A4V | Vanatoo Transparent Zero Plus | |
|---|---|---|
| Price | $1,079.98 per pair | $499.99 per pair |
| Ranked | #67 of 108 in Medium Size Powered Bookshelf Speakers | #46 of 108 in Medium Size Powered Bookshelf Speakers |
| Enclosure | 2-way active, dual front ports | - |
| Drivers | X-ART folded-ribbon tweeter, 4” MLM woofer | 4” aluminum cone woofer, 4” long-throw passive radiator, 1” soft dome tweeter |
| Dimensions | 10.6H x 6.2W x 8.7D in | 8.5”H x 5.5”W x 6”D |
| Weight | 12.8 lbs (5.8 kg) each | 7.1 lbs (3.2 kg) each |
| Amplifier Power | 130W RMS each | 120W total (Class D) |
| Inputs | XLR and RCA; Ethernet for control | Bluetooth (aptX HD), USB (24-bit/96kHz), Toslink Optical (24-bit/96kHz), 3.5mm Analog |
| Spinorama Preference Score | 3.92 | 4.07 |
| Spinorama Preference Score with Perfect Sub | 6.33 | 6.73 |
| XLR Input | Yes | No |
| RCA Input | Yes | No |
| TRS Input | No | No |
| Optical Input | No | Yes |
| Coaxial Input | No | No |
| USB Input | No | Yes |
| HDMI Input | No | No |
| AES Input | No | No |
| Aux Input | No | Yes |
| Bluetooth | No | Yes |
| Frequency Response | 58Hz - 41kHz (-3dB) (Manufacturer specified) | 56Hz - 20kHz (+/-3dB) (Manufacturer specified) |
| Bluetooth Codecs | - | SBC, AAC, aptX, aptX HD |
| Bass Extension (-3dB) | - | 92Hz (measured, Erin’s Audio Corner) |
| Bass Extension (-10dB) | - | 53Hz (measured, Erin’s Audio Corner) |
| Sensitivity | - | 88.5dB (measured at 0.3V/1m, Erin’s Audio Corner) |
| DSP | - | Yes (8th-order Butterworth high-pass at 58Hz) |
| Subwoofer Output | - | Yes |
| Outputs | - | RCA subwoofer |
| Bluetooth Version | - | 5.1 |
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