Short answer: the Mackie CR3-X. Both are rated 3.0/5 for sound quality (#34 and #35 of 48 powered bookshelf speakers), and the Mackie CR3-X costs $99.99 against $139 for the Fluid Audio C35BT, with sound quality a draw, the lower price decides it.
What the Fluid Audio C35BT does well: An inexpensive desktop pair with Bluetooth, balanced inputs, a front volume knob and a headphone jack for a basic computer setup. The catch: 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 Mackie CR3-X: Inexpensive small desktop speakers with RCA and aux inputs for casual listening at moderate volume. The tradeoff: The response spans 4.4dB from 300Hz to 5kHz, with substantial narrow-band irregularities and bass rolloff reaching -3dB around 75Hz.
Buy the Mackie CR3-X. Both are rated the same for sound quality, and it costs $39.01 less than the Fluid Audio C35BT.
Want more options? Browse the full Powered Home rankings.
An inexpensive desktop pair with Bluetooth, balanced inputs, a front volume knob and a headphone jack for a basic computer setup.
Inexpensive small desktop speakers with RCA and aux inputs for casual listening at moderate volume.
Prices on this page were last checked October 23, 2026 at 8:27 AM 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.
As an eBay Partner, we may be compensated if you make a purchase.
Specifications Side By Side
| Fluid Audio C35BT | Mackie CR3-X | |
|---|---|---|
| Price | $139.00 per pair | $99.99 per pair |
| Ranked | #35 of 48 in Small Size Powered Bookshelf Speakers | #34 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” woofer, 0.75” silk dome tweeter |
| Amplifier Power | 64W total | 50W total (25W per speaker) |
| Inputs | Bluetooth, RCA, 3.5mm, balanced TRS | RCA, Aux |
| Outputs | Headphone | 1/8” headphone jack |
| Dimensions | 7.3H x 4.9W x 5.9D in | 8.1”H x 5.5”W x 7.1”D (205.7 x 139.7 x 180.3 mm) |
| Spinorama Preference Score | 2.57 | 2.50 |
| Spinorama Preference Score with Perfect Sub | 5.57 | 5.42 |
| 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 | Yes |
| Weight | 10 lbs (4.52 kg) pair | 7.7 lbs (3.5 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 | - | No |
| Sensitivity | - | 96dB (measured at 0.3V/1m, Erin’s Audio Corner) |
| Maximum SPL | - | 92dB @ 1m (manufacturer specified) |
Frequency Response Compared
Both speakers’ spinorama measurements, overlaid. A flatter line is more neutral: peaks sound forward or harsh, dips sound recessed. Each curve is shifted so its average from 300 Hz to 3 kHz sits at 0 dB, so loudness differences between the two are removed and only the shape is compared. The two were measured by different sources, so small differences, especially in the bass, can come from the measurement setup rather than the speakers.
Measurement data: Fluid Audio C35BT (measured by Audio Science Review) and Mackie CR3-X (measured by Erin’s Audio Corner), via spinorama.org.
Related Speaker Comparisons
More top alternatives to Mackie CR3-X: