Short answer: the Fluid Audio C35BT. It ranks #35 of 48 powered bookshelf speakers by sound quality, rated 3.0/5, at $139. The PreSonus Eris E3.5 2nd Gen ranks #45, rated 2.5/5, at $99.99, $39.01 cheaper, which does not close the gap in sound quality.
The Fluid Audio C35BT is the more accurate choice. An inexpensive desktop pair with Bluetooth, balanced inputs, a front volume knob and a headphone jack for a basic computer setup. Its measured preference score, a predictor of how neutral it sounds, is 2.57 against 1.51 for the PreSonus Eris E3.5 2nd Gen. It keeps a wired aux input, which the PreSonus Eris E3.5 2nd Gen lacks. Watch for: Preference scores of 2.57 standalone and 5.57 with an ideal subwoofer indicate that the limitations are not just missing bass.
Why pick the PreSonus Eris E3.5 2nd Gen: Small desktop monitors with bass and treble controls on the back to adjust for desk or wall placement. The catch: The stock response spans 7.2dB from 300Hz to 5kHz and has a strong rising trend of about 1.27dB per octave, emphasizing treble over the midrange.
Buy the Fluid Audio C35BT. It is rated higher for sound quality, and the $39.01 saving on the PreSonus Eris E3.5 2nd Gen is not enough to make up the difference.
Looking for alternatives? See the complete Powered Home rankings.
Prices on this page were last checked November 7, 2026 at 7:34 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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Specifications Side By Side
| Fluid Audio C35BT | PreSonus Eris E3.5 2nd Gen | |
|---|---|---|
| Price | $139.00 per pair | $99.99 per pair |
| Ranked | #35 of 48 in Small Size Powered Bookshelf Speakers | #45 of 48 in Small Size Powered Bookshelf Speakers |
| Enclosure | Powered 2-way, front-ported | - |
| Drivers | 0.8” silk-dome tweeter, 3.5” composite woofer | 3.5” woofer, 1” silk dome tweeter |
| Amplifier Power | 64W total | 50W total (25W per speaker) |
| Inputs | Bluetooth, RCA, 3.5mm, balanced TRS | RCA, 1/4” Balanced |
| Outputs | Headphone | 1/8” headphone jack |
| Dimensions | 7.3H x 4.9W x 5.9D in | 8.3”H x 6”W x 5.5”D (210.8 x 152.4 x 139.7 mm) |
| Spinorama Preference Score | 2.57 | 1.51 |
| Spinorama Preference Score with Perfect Sub | 5.57 | 4.17 |
| Headphone Output | Yes | Yes |
| XLR Input | No | No |
| RCA Input | Yes | Yes |
| TRS Input | Yes | No |
| Optical Input | No | No |
| Coaxial Input | No | No |
| USB Input | No | No |
| HDMI Input | No | No |
| AES Input | No | No |
| Aux Input | Yes | No |
| Weight | 10 lbs (4.52 kg) pair | 8.6 lbs (3.9 kg) |
| Bluetooth | Yes | No |
| Bluetooth Version | 5.0 | - |
| Frequency Response | 80Hz - 20kHz (Manufacturer specified) | 80 Hz-20 kHz (-3dB) (Manufacturer specified) |
| App | - | No |
| Bass Extension (-10dB) | - | 70Hz (measured, Erin’s Audio Corner) |
| Bass Extension (-3dB) | - | 80Hz (measured, Erin’s Audio Corner) |
| EQ | - | Yes (Acoustic space) |
| Sensitivity | - | 87.4dB (measured at 0.3V/1m, Erin’s Audio Corner) |
| Maximum SPL | - | 95dB @ 1m (manufacturer specified) |
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