Short answer: the Audioengine A2+. It ranks #19 of 48 powered bookshelf speakers by sound quality, rated 3.4/5, at $299; the Fiio SP3 ranks #38, rated 2.9/5, and costs $299.99, which makes this an easy call rather than a real tradeoff.
The Audioengine A2+ is the better-sounding choice. Tiny desktop speakers with Bluetooth, USB and analog inputs and a variable RCA output. Watch for: The 2.78 standalone score and roughly 106Hz measured -3dB point reveal how much bass is missing without reinforcement or a subwoofer.
The Fiio SP3 is the more accurate, deeper-bass pick. Small angled desktop speakers that fit a tight desk and reach a little deeper in the bass than many similar sized pairs. Its measured preference score, a predictor of how neutral it sounds, is 3.56 against 2.78 for the Audioengine A2+. Its bass reaches about 59Hz before falling 3dB, against 105.5Hz for the Audioengine A2+. The catch: The response rises strongly toward the treble, about 1.13dB per octave, with a recessed midrange and problematic crossover behavior.
Buy the Audioengine A2+. It is rated higher for sound quality than the Fiio SP3 and costs less, which makes it the one to get unless you need something the other one does better.
Still deciding? The full Powered Home rankings cover every ranked option.
Measured Differences
- Close enough not to matter: bass extension (58.9 Hz vs 53 Hz, 10 dB down); preference score with a subwoofer (6.1 vs 6.2).
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Specifications Side By Side
| Audioengine A2+ | Fiio SP3 | |
|---|---|---|
| Price | $299.00 per pair | $299.99 per pair |
| Ranked | #19 of 48 in Small Size Powered Bookshelf Speakers | #38 of 48 in Small Size Powered Bookshelf Speakers |
| Inputs | RCA, 3.5mm, USB, Bluetooth 5.0 | AUX, RCA |
| Drivers | 0.75” silk dome tweeter, 2.75” fiber woofer | 3.5” carbon fiber midwoofer, 1” silk dome tweeter |
| Amplifier Power | 15W RMS / 30W peak per channel | 40W total (30W midwoofer + 10W tweeter) |
| Frequency Response | 65Hz - 22kHz (+-2dB, Manufacturer specified) | 65Hz - 20kHz (±2dB) (Manufacturer specified) |
| Bass Extension (-3dB) | 105.5Hz (measured, Erin’s Audio Corner) | 59Hz (measured, Erin’s Audio Corner) |
| Bass Extension (-10dB) | 58.9Hz (measured, Erin’s Audio Corner) | 53Hz (measured, Erin’s Audio Corner) |
| Bluetooth Version | 5.0 | - |
| EQ | No (fixed volume knob only) | - |
| App | No | - |
| Dimensions | 6” x 4” x 5.2” (152 x 102 x 133 mm) | 6.4”H x 4.7”W x 5.2”D (163 x 120 x 132 mm) |
| Weight | 3.5 lbs (1.6 kg) left / 3.1 lbs (1.4 kg) right | 4.3 lbs (1.95 kg) each |
| Spinorama Preference Score | 2.78 | 3.56 |
| Spinorama Preference Score with Perfect Sub | 6.10 | 6.17 |
| Subwoofer Output | Yes | - |
| Outputs | RCA variable output (subwoofer) | - |
| XLR Input | No | No |
| RCA Input | Yes | Yes |
| TRS Input | No | No |
| Optical Input | No | No |
| Coaxial Input | No | No |
| USB Input | Yes | No |
| HDMI Input | No | No |
| AES Input | No | No |
| Aux Input | Yes | Yes |
| Bluetooth | Yes | No |
Where the Ratings Come From
- Audioengine A2+: Spinorama.org measurements and reviews by Erin’s Audio Corner and DSAUDIO.review.
- Fiio SP3: Spinorama.org measurements and reviews by Erin’s Audio Corner.
This comparison is generated from the ratings, specifications and measurements on each product’s own page, and it updates when that data changes. How we rank explains how each rating is decided.
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