Short answer: the PreSonus Eris Studio 5, if you are buying new. The PreSonus Eris E5 ranks higher than the Fluid Audio FX50 V2 (#77 vs #103 of 108 powered bookshelf speakers) but is discontinued; its replacement, the PreSonus Eris Studio 5, is rated 3.6/5 at $299.98 and is still sold new.

Why pick the Fluid Audio FX50 V2: A coaxial studio monitor with balanced inputs, boundary controls and flexible mounting for compact installs. Watch for: Scores of 1.80 standalone and 4.42 with an ideal subwoofer indicate poor native tonal accuracy.
The PreSonus Eris E5 is the better-sounding option. A low cost 5 inch studio monitor with a fuller low end, balanced and RCA inputs, and placement adjustment. The catch: A fuller bass balance is not necessarily neutral.
Buy the PreSonus Eris Studio 5, the replacement for the discontinued PreSonus Eris E5; it is rated higher for sound quality than the Fluid Audio FX50 V2.
Still deciding? The full Powered Home rankings cover every ranked option.
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Specifications Side By Side
| Fluid Audio FX50 V2 | PreSonus Eris E5 | |
|---|---|---|
| Price | $298 per pair | $186.98 per pair Discontinued |
| Ranked | #103 of 108 in Medium Size Powered Bookshelf Speakers | #77 of 108 in Medium Size Powered Bookshelf Speakers |
| Enclosure | Active coaxial, front-ported | - |
| Drivers | 1-inch silk tweeter coaxially mounted in 5-inch paper woofer | 5” (127mm) woofer |
| Frequency Response | 49Hz-22kHz +/-2dB | 53Hz - 22kHz (Manufacturer specified) |
| Amplifier Power | 90W each | 80w Per Speaker |
| Maximum SPL | 110dB | - |
| Inputs | XLR/TRS and RCA | TRS, XLR, RCA |
| Dimensions | 9.2H x 6.9W x 9.1D in | 10.2”H x 7”W x 7.7”D (259.1 x 177.8 x 195.6 mm) |
| Weight | 8.4 lbs (3.8 kg) each | 10.1 lbs (4.6 kg) each |
| Spinorama Preference Score | 1.80 | - |
| Spinorama Preference Score with Perfect Sub | 4.42 | - |
| XLR Input | Yes | Yes |
| RCA Input | Yes | 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 |
| App | - | No |
| EQ | - | Yes (Room adjustment) |
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