Short answer: the Fluid Audio FX50 V2, though neither ranks well in its class. It ranks #103 of 108 powered bookshelf speakers by sound quality, rated 2.7/5, at $298; the Avantone Pro Active MixCube ranks #107, rated 1.7/5, and costs $518, which makes this an easy call rather than a real tradeoff. Both are rated below 3.0/5 among the 108 powered bookshelf speakers, so if sound quality matters, consider the Topping MA4 instead, ranked #12 at $378.
The case for the Avantone Pro Active MixCube: A single driver studio reference cube for checking how mixes translate to small speakers, not for general listening. The catch: It is not a full-range music speaker.
The Fluid Audio FX50 V2 is the more accurate pick. A coaxial studio monitor with balanced inputs, boundary controls and flexible mounting for compact installs. Its measured preference score, a predictor of how neutral it sounds, is 1.80 against -3.58 for the Avantone Pro Active MixCube. Watch for: Scores of 1.80 standalone and 4.42 with an ideal subwoofer indicate poor native tonal accuracy.
Buy the Fluid Audio FX50 V2. It is rated higher for sound quality than the Avantone Pro Active MixCube and costs less, which makes it the one to get unless you need something the other one does better.
Still deciding? The full Powered Home rankings cover every ranked option.
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Specifications Side By Side
| Avantone Pro Active MixCube | Fluid Audio FX50 V2 | |
|---|---|---|
| Price | $518 per pair | $298 per pair |
| Ranked | #107 of 108 in Medium Size Powered Bookshelf Speakers | #103 of 108 in Medium Size Powered Bookshelf Speakers |
| Enclosure | Powered sealed full-range monitor | Active coaxial, front-ported |
| Amplifier Power | 60W RMS Class AB | 90W each |
| Frequency Response | 90Hz-17kHz | 49Hz-22kHz +/-2dB |
| Maximum SPL | 104dB at 1m | 110dB |
| Inputs | Balanced XLR/TRS combo | XLR/TRS and RCA |
| Dimensions | 6.5H x 6.5W x 6.5D in | 9.2H x 6.9W x 9.1D in |
| Weight | 7.1 lbs (3.2 kg) each | 8.4 lbs (3.8 kg) each |
| Drivers | 5.25-inch paper-cone driver; 5.25-inch paper-cone driver; 5.25-inch paper-cone driver; 5.25-inch paper-cone driver | 1-inch silk tweeter coaxially mounted in 5-inch paper woofer |
| Spinorama Preference Score | -3.58 | 1.80 |
| Spinorama Preference Score with Perfect Sub | 1.16 | 4.42 |
| XLR Input | Yes | Yes |
| RCA Input | No | Yes |
| TRS Input | Yes | Yes |
| Optical Input | No | No |
| Coaxial Input | No | No |
| USB Input | No | No |
| HDMI Input | No | No |
| AES Input | No | No |
| Aux Input | No | No |
| Bluetooth | No | No |
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