Short answer: the Fluid Audio C35BT. It ranks #19 of 24 powered bookshelf speakers by sound quality, rated 3.0/5, at $139; the Midiplus MI3 II ranks #23, rated 2.4/5, at $139. Close enough in price that the sound-quality gap is the deciding factor.
The case for the Fluid Audio C35BT: Balanced TRS inputs, Bluetooth, front volume control and a headphone output make this inexpensive pair practical for a basic desktop 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.
What the Midiplus MI3 II does well: Compact cabinets, Bluetooth, analog inputs and high-frequency adjustment can suit a basic desktop system. The tradeoff: Preference scores of 0.99 standalone and 3.84 with an ideal subwoofer are poor.
Buy the Fluid Audio C35BT. It is rated higher for sound quality than the Midiplus MI3 II at the same price, so the other one has nothing left to offer.
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Specifications Side By Side
| Fluid Audio C35BT | Midiplus MI3 II | |
|---|---|---|
| Price | $139 per pair | $139 per pair |
| Ranked | #19 of 24 in Small Size Powered Bookshelf Speakers | #23 of 24 in Small Size Powered Bookshelf Speakers |
| Enclosure | Powered 2-way, front-ported | Powered 2-way |
| Drivers | 0.8" silk-dome tweeter, 3.5" composite woofer | 0.75-inch silk tweeter, 3-inch fiberglass woofer |
| Amplifier Power | 64W total | 60W RMS per pair |
| Inputs | Bluetooth, RCA, 3.5mm, balanced TRS | RCA, 3.5mm, Bluetooth |
| Outputs | Headphone | - |
| Dimensions | 7.3H x 4.9W x 5.9D in | 6.5H x 4.7W x 6D in |
| Spinorama Preference Score | 2.57 | 0.99 |
| Spinorama Preference Score with Perfect Sub | 5.57 | 3.84 |
| 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 | - |
| Bluetooth | Yes, 5.0 | Yes, 5.0 |
| Frequency Response | 80Hz - 20kHz (Manufacturer specified) | 70Hz-25kHz |
| Maximum SPL | - | 98dB |
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Prices on this page were last checked September 23, 2026 at 11:24 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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The Two Speakers In Full
Fluid Audio C35BT: $139 per pair Amazon eBay
Pros: Balanced TRS inputs, Bluetooth, front volume control and a headphone output make this inexpensive pair practical for a basic desktop setup. ASR’s measured -3dB point is about 78Hz, so it covers more upper bass than the shallowest-reaching mini speakers.
Cons: Preference scores of 2.57 standalone and 5.57 with an ideal subwoofer indicate that the limitations are not just missing bass. Listening-window narrow-band deviation of 0.555 and sound-power deviation of 0.657 show that response irregularities affect both direct and room-reflected sound. A subwoofer cannot correct those tonal problems, and the small drivers are not a basis for expecting high clean output.
Full Fluid Audio C35BT review and specifications →
| AES Input | No |
|---|---|
| Amplifier Power | 64W total |
| Aux Input | Yes |
| Bluetooth | Yes, 5.0 |
| Coaxial Input | No |
| Dimensions | 7.3H x 4.9W x 5.9D in |
| Drivers | 0.8" silk-dome tweeter, 3.5" composite woofer |
| Enclosure | Powered 2-way, front-ported |
| Frequency Response | 80Hz - 20kHz (Manufacturer specified) |
| HDMI Input | No |
| Headphone Output | Yes |
| Inputs | Bluetooth, RCA, 3.5mm, balanced TRS |
| Optical Input | No |
| Outputs | Headphone |
| RCA Input | Yes |
| Spinorama Preference Score | 2.57 |
| Spinorama Preference Score with Perfect Sub | 5.57 |
| TRS Input | Yes |
| USB Input | No |
| Weight | 10 lbs (4.52 kg) pair |
| XLR Input | No |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
- Fluid Audio C35BT vs Mackie CR3-X
- Fluid Audio C35BT vs Fiio SP3
- Fluid Audio C35BT vs M-Audio BX3
- Fluid Audio C35BT vs Audioengine HD3
- Fluid Audio C35BT vs Monoprice Monolith MM-3
- Fluid Audio C35BT vs Presonus Eris E3.5 2nd Gen
- Fluid Audio C35BT vs Klipsch ProMedia Lumina
- Fluid Audio C35BT vs Monoprice DT-3
- See all 9 comparisons
Midiplus MI3 II: $139 per pair eBay
Pros: Compact cabinets, Bluetooth, analog inputs and high-frequency adjustment can suit a basic desktop system. The measured -3dB point is about 67Hz, so missing bass is not its only differentiator from other tiny speakers.
Cons: Preference scores of 0.99 standalone and 3.84 with an ideal subwoofer are poor. High narrow-band deviations on-axis (0.938) and across the listening window (0.852) indicate pronounced response irregularities that can color voices and instruments. The fairly flat overall trend does not mean the response itself is smooth. A subwoofer or simple treble adjustment cannot resolve all of these problems.
Full Midiplus MI3 II review and specifications →
| AES Input | No |
|---|---|
| Amplifier Power | 60W RMS per pair |
| Aux Input | Yes |
| Bluetooth | Yes, 5.0 |
| Coaxial Input | No |
| Dimensions | 6.5H x 4.7W x 6D in |
| Drivers | 0.75-inch silk tweeter, 3-inch fiberglass woofer |
| Enclosure | Powered 2-way |
| Frequency Response | 70Hz-25kHz |
| HDMI Input | No |
| Inputs | RCA, 3.5mm, Bluetooth |
| Maximum SPL | 98dB |
| Optical Input | No |
| RCA Input | Yes |
| Spinorama Preference Score | 0.99 |
| Spinorama Preference Score with Perfect Sub | 3.84 |
| TRS Input | No |
| USB Input | No |
| XLR Input | No |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
- Midiplus MI3 II vs Presonus Eris E3.5 2nd Gen
- Midiplus MI3 II vs Monoprice DT-3
- Midiplus MI3 II vs M-Audio BX3
- Midiplus MI3 II vs Fiio SP3
- Midiplus MI3 II vs Mackie CR3-X
- Midiplus MI3 II vs Audioengine HD3
- Midiplus MI3 II vs Klipsch ProMedia Lumina
- Midiplus MI3 II vs Audioengine A2+
- See all 9 comparisons