Short answer: the Audioengine HD3 for better sound quality, the Fluid Audio C35BT for the lower price. The Audioengine HD3 ranks #29 of 48 powered bookshelf speakers, rated 3.2/5, at $359. The Fluid Audio C35BT ranks #35, rated 3.0/5, at $139, $220 cheaper.
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 tradeoff: Preference scores of 2.57 standalone and 5.57 with an ideal subwoofer indicate that the limitations are not just missing bass.
The case for the Audioengine HD3: Compact powered desktop speakers with Bluetooth and analog inputs for when space is tight. The catch: Limited bass makes a subwoofer useful for fuller music reproduction.
Buy the Fluid Audio C35BT if the price matters more than sound quality. Buy the Audioengine HD3 if sound quality matters more than the price.
Still deciding? The full Powered Home rankings cover every ranked option.
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.
As an eBay Partner, we may be compensated if you make a purchase.
Specifications Side By Side
| Fluid Audio C35BT | Audioengine HD3 | |
|---|---|---|
| Price | $139.00 per pair | $359.00 per pair |
| Ranked | #35 of 48 in Small Size Powered Bookshelf Speakers | #29 of 48 in Small Size Powered Bookshelf Speakers |
| Enclosure | Powered 2-way, front-ported | - |
| Drivers | 0.8” silk-dome tweeter, 3.5” composite woofer | 2.75” woofer, 0.75” silk dome tweeter |
| Amplifier Power | 64W total | 30W total (15W per speaker) |
| Inputs | Bluetooth, RCA, 3.5mm, balanced TRS | Bluetooth, Aux, RCA Input |
| Outputs | Headphone | RCA variable output (subwoofer) |
| Dimensions | 7.3H x 4.9W x 5.9D in | 9”H x 5.5”W x 6.5”D (228.6 x 139.7 x 165.1 mm) |
| Spinorama Preference Score | 2.57 | - |
| Spinorama Preference Score with Perfect Sub | 5.57 | - |
| Headphone Output | 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 | 7.3 lbs (3.3 kg) |
| Bluetooth | Yes | Yes |
| Bluetooth Version | 5.0 | 5.0 |
| Frequency Response | 80Hz - 20kHz (Manufacturer specified) | 65 Hz-20 kHz (-3dB) (Manufacturer specified) |
| App | - | No |
| Bass Extension (-10dB) | - | 58Hz |
| Bass Extension (-3dB) | - | 65Hz |
| Bluetooth Codecs | - | SBC, aptX |
| EQ | - | No |
| Maximum SPL | - | 90dB @ 1m (manufacturer specified) |
| Subwoofer Output | - | Yes |
Related Speaker Comparisons
How Audioengine HD3 compares with other leading options: