Short answer: the Fluid Audio C35BT, if you are buying new. The Monacor SOUND-4BT ranks higher than it (#22 vs #35 of 48 powered bookshelf speakers, 3.3/5 vs 3.0/5) but is discontinued, so only consider it used; the Fluid Audio C35BT is still sold new at $139.
The Monacor SOUND-4BT is the more accurate option. A compact powered pair with Bluetooth, optical and analog inputs, a remote and a subwoofer output. Its measured preference score, a predictor of how neutral it sounds, is 3.58 against 2.57 for the Fluid Audio C35BT. Watch for: Predicted in-room response remains uneven despite the modest midrange span.
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. Watch for: Preference scores of 2.57 standalone and 5.57 with an ideal subwoofer indicate that the limitations are not just missing bass.
Buy the Fluid Audio C35BT, since the Monacor SOUND-4BT is discontinued and only worth hunting down used.
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Specifications Side By Side
| Monacor SOUND-4BT | Fluid Audio C35BT | |
|---|---|---|
| Price | $310 per pair Discontinued | $139.00 per pair |
| Ranked | #22 of 48 in Small Size Powered Bookshelf Speakers | #35 of 48 in Small Size Powered Bookshelf Speakers |
| Enclosure | 2-way powered stereo pair, bass reflex | Powered 2-way, front-ported |
| Drivers | 1” dome tweeter, 4” woofer | 0.8” silk-dome tweeter, 3.5” composite woofer |
| Dimensions | 8.5H x 5.5W x 6.7D in | 7.3H x 4.9W x 5.9D in |
| Weight | 11.5 lbs (5.2 kg)/pair | 10 lbs (4.52 kg) pair |
| Amplifier Power | 2 x 30W RMS | 64W total |
| Inputs | Bluetooth 4.0 aptX, optical, RCA, 3.5mm | Bluetooth, RCA, 3.5mm, balanced TRS |
| Bluetooth Codecs | SBC, aptX | - |
| Spinorama Preference Score | 3.58 | 2.57 |
| Spinorama Preference Score with Perfect Sub | 6.10 | 5.57 |
| Subwoofer Output | Yes | - |
| Outputs | Subwoofer | Headphone |
| XLR Input | No | No |
| RCA Input | Yes | Yes |
| TRS Input | No | Yes |
| Optical Input | Yes | No |
| Coaxial Input | No | No |
| USB Input | No | No |
| HDMI Input | No | No |
| AES Input | No | No |
| Aux Input | Yes | Yes |
| Bluetooth | Yes | Yes |
| Bluetooth Version | 4.0 | 5.0 |
| Frequency Response | 45Hz - 20kHz (Manufacturer specified) | 80Hz - 20kHz (Manufacturer specified) |
| Headphone Output | - | Yes |
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