Short answer: the Fluid Audio FX50 V2, though neither ranks well in its class. It ranks #64 of 67 powered bookshelf speakers by sound quality, rated 2.7/5, at $149; the Avantone Pro Active MixCube ranks #67, rated 1.7/5, and costs $259, which makes this an easy call rather than a real tradeoff. Both are rated below 3.0/5 among the 67 powered bookshelf speakers, so if sound quality matters, consider the JBL 305P MKII instead, ranked #13 at $299.
The case for the Avantone Pro Active MixCube: A deliberately bandwidth-limited single-driver monitor for checking midrange balance and mix translation. The catch: It is not a full-range music speaker.
What the Fluid Audio FX50 V2 does well: The coaxial geometry and mounting provisions allow flexible physical orientation, while balanced inputs and boundary controls suit a compact studio installation. 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, so the other one has nothing left to offer.
Still deciding? The full Powered Home rankings cover every ranked option.
Specifications Side By Side
| Avantone Pro Active MixCube | Fluid Audio FX50 V2 | |
|---|---|---|
| Price | $518 per pair | $298 per pair |
| Ranked | #67 of 67 in Medium Size Powered Bookshelf Speakers | #64 of 67 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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Prices on this page were last checked September 23, 2026 at 11:24 PM 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
Avantone Pro Active MixCube: $518 per pair B&H Photo Video eBay
Pros: A deliberately bandwidth-limited single-driver monitor for checking midrange balance and mix translation. The powered, sealed format, isolation pad and stand mounting make it useful as a secondary studio reference.
Cons: It is not a full-range music speaker. The measured -3dB point is around 297Hz, and scores of -3.58 standalone and 1.16 with an ideal subwoofer reflect severe bandwidth and response limitations for general listening. A subwoofer cannot restore the missing high-frequency coverage. This low general-purpose rank does not measure its usefulness for the specialist task of checking a mix.
Full Avantone Pro Active MixCube review and specifications →
| AES Input | No |
|---|---|
| Amplifier Power | 60W RMS Class AB |
| Aux Input | No |
| Bluetooth | No |
| Coaxial Input | No |
| Dimensions | 6.5H x 6.5W x 6.5D in |
| 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 |
| Enclosure | Powered sealed full-range monitor |
| Frequency Response | 90Hz-17kHz |
| HDMI Input | No |
| Inputs | Balanced XLR/TRS combo |
| Maximum SPL | 104dB at 1m |
| Optical Input | No |
| RCA Input | No |
| Spinorama Preference Score | -3.58 |
| Spinorama Preference Score with Perfect Sub | 1.16 |
| TRS Input | Yes |
| USB Input | No |
| Weight | 7.1 lbs (3.2 kg) each |
| XLR Input | Yes |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
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Fluid Audio FX50 V2: $298 per pair Fluid Audio eBay
Pros: The coaxial geometry and mounting provisions allow flexible physical orientation, while balanced inputs and boundary controls suit a compact studio installation. Bass reaches -3dB around 67Hz in ASR’s selected measurement.
Cons: Scores of 1.80 standalone and 4.42 with an ideal subwoofer indicate poor native tonal accuracy. Listening-window and predicted-room narrow-band deviations are both around 0.80, showing irregular sound for both the listener and room reflections. Coaxial construction does not guarantee smooth dispersion or neutral reproduction, and correction features should not be credited as a proven fix.
Full Fluid Audio FX50 V2 review and specifications →
| AES Input | No |
|---|---|
| Amplifier Power | 90W each |
| Aux Input | No |
| Bluetooth | No |
| Coaxial Input | No |
| Dimensions | 9.2H x 6.9W x 9.1D in |
| Drivers | 1-inch silk tweeter coaxially mounted in 5-inch paper woofer |
| Enclosure | Active coaxial, front-ported |
| Frequency Response | 49Hz-22kHz +/-2dB |
| HDMI Input | No |
| Inputs | XLR/TRS and RCA |
| Maximum SPL | 110dB |
| Optical Input | No |
| RCA Input | Yes |
| Spinorama Preference Score | 1.80 |
| Spinorama Preference Score with Perfect Sub | 4.42 |
| TRS Input | Yes |
| USB Input | No |
| Weight | 8.4 lbs (3.8 kg) each |
| XLR Input | Yes |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
- Fluid Audio FX50 V2 vs Midiplus MI5 II
- Fluid Audio FX50 V2 vs Edifier R1280T
- Fluid Audio FX50 V2 vs Edifier R1280DB
- Fluid Audio FX50 V2 vs Edifier R1700BT
- Fluid Audio FX50 V2 vs Audioengine HD4
- Fluid Audio FX50 V2 vs Edifier S1000MKII
- Fluid Audio FX50 V2 vs Edifier R2000DB
- Fluid Audio FX50 V2 vs Presonus Eris E5
- See all 17 comparisons