Short answer: the Cambridge Audio L/R S if sound quality matters most, the Fiio SP3 if price matters most. The Cambridge Audio L/R S ranks #4 of 23 powered bookshelf speakers at $549. The Fiio SP3 ranks #19 at $299.99, $249.01 cheaper.
What the Cambridge Audio L/R S offers: A 2-way active bookshelf pair built for near-field desktop use, with a 21mm aluminum tweeter and a 3-inch long-throw woofer on each speaker. Erin’s Audio Corner measured a very neutral on-axis response with good directivity control up through the 2-3kHz handoff to the tweeter, an F3 of about 57Hz and F10 of about 50Hz, and output held within roughly plus or minus 2.5dB from 80Hz to 20kHz. Horizontal dispersion of about plus or minus 60 degrees and a vertical window of about plus 30 to minus 20 degrees make it forgiving of off-center desktop seating. Two rear switches (a desktop-placement compensation switch and a near-wall/free-space switch) plus in-app DSP for room size, wall distance, and reflective surface type let you tune the in-room response rather than just hoping placement works out, and the reviewer noted an audible tightening of the bass moving between room-size settings. Rear connectivity includes RCA, optical digital, USB-C, and a dedicated subwoofer output. Watch for: Maximum clean output is limited: Erin’s Audio Corner measured about 86dB before the onboard limiter engages around 96dB to protect the drivers, so this is a near-field or small-room speaker rather than one built to fill a living room. Each speaker’s Class D amplifier splits only 50W to the woofer and 50W to the tweeter, modest for the class. The DSP room-correction options are preset-based rather than a true microphone-measured calibration at the listening position, so results depend on picking settings that match your actual room.
What the Fiio SP3 offers: Compact cabinets and angled bases fit a small desk. The existing review found useful dynamic capability at higher frequencies, so lack of output is not the only issue. Erin’s Klippel data shows a measured -3dB bass point around 60Hz, deeper than several similarly sized alternatives. Watch for: The response rises strongly toward the treble, about 1.13dB per octave, with a recessed midrange and problematic crossover behavior. Its 2.71 standalone and 5.32 ideal-subwoofer scores do not capture the full practical impact of the review’s boomy bass and off-axis tonal problems. Changing angle trades one coloration for another. Those audible limitations weigh against it more heavily than its numerical score or build quality.
Buy the Cambridge Audio L/R S if sound quality matters more than the price. Buy the Fiio SP3 if the price matters more than sound quality.
The Fiio SP3 is not a sound-quality pick. It sits near the bottom of the 23 powered bookshelf speakers; there are better options higher up.
Looking for alternatives? See the complete Powered Home rankings.
Specifications Side By Side
| Cambridge Audio L/R S | Fiio SP3 | |
|---|---|---|
| Price | $549.00 per pair | $299.99 per pair |
| Ranked | #4 of 23 in Small Size Powered Bookshelf Speakers | #19 of 23 in Small Size Powered Bookshelf Speakers |
| Bass Extension (-3dB) | 57Hz (measured, Erin's Audio Corner) | 59Hz (measured, Erin's Audio Corner) |
| Bass Extension (-10dB) | 50Hz (measured, Erin's Audio Corner) | 53Hz (measured, Erin's Audio Corner) |
| Drivers | 21mm aluminum dome tweeter, 3" long-throw woofer | 3.5" carbon fiber midwoofer, 1" silk dome tweeter |
| Frequency Response | 55Hz - 24kHz (±3dB, manufacturer specified) | - |
| Amplifier Power | 100W total (50W to woofer, 50W to tweeter, per speaker) | 40W total (30W midwoofer + 10W tweeter) |
| Inputs | RCA, optical digital, USB-C | AUX, RCA |
| Bluetooth Codecs | SBC, AAC, aptX, aptX HD | - |
| App | Yes | - |
| DSP | Yes, room size, wall distance, and reflective surface correction; desktop-placement and near-wall/free-space switches | - |
| Dimensions | 5.3" (134 mm) W x 226mm H x 180mm D (each) | 6.4"H x 4.7"W x 5.2"D (163 x 120 x 132 mm) |
| Weight | 6.6 lbs (3.0kg) primary speaker, 5.7 lbs (2.6kg) secondary speaker | 4.3 lbs (1.95 kg) each |
| Subwoofer Output | Yes | - |
| Outputs | Subwoofer, wired speaker-to-speaker link | - |
| Spinorama Preference Score | - | 2.71 |
| Spinorama Preference Score with Perfect Sub | - | 5.32 |
Related Speaker Comparisons
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- Genelec 8010A vs Cambridge Audio L/R S
- Adam Audio D3v vs Cambridge Audio L/R S
- IK Multimedia iLoud Micro Monitor vs Cambridge Audio L/R S
- Edifier M60 vs Cambridge Audio L/R S
- HiVi Swan X3 vs Cambridge Audio L/R S
Prices on this page were last checked September 16, 2026 at 12:41 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.
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The Two Speakers In Full
Cambridge Audio L/R S: $549.00 per pair Amazon eBay
Pros: A 2-way active bookshelf pair built for near-field desktop use, with a 21mm aluminum tweeter and a 3-inch long-throw woofer on each speaker. Erin’s Audio Corner measured a very neutral on-axis response with good directivity control up through the 2-3kHz handoff to the tweeter, an F3 of about 57Hz and F10 of about 50Hz, and output held within roughly plus or minus 2.5dB from 80Hz to 20kHz. Horizontal dispersion of about plus or minus 60 degrees and a vertical window of about plus 30 to minus 20 degrees make it forgiving of off-center desktop seating. Two rear switches (a desktop-placement compensation switch and a near-wall/free-space switch) plus in-app DSP for room size, wall distance, and reflective surface type let you tune the in-room response rather than just hoping placement works out, and the reviewer noted an audible tightening of the bass moving between room-size settings. Rear connectivity includes RCA, optical digital, USB-C, and a dedicated subwoofer output. Measured bass extension of 57Hz (-3dB).
Cons: Maximum clean output is limited: Erin’s Audio Corner measured about 86dB before the onboard limiter engages around 96dB to protect the drivers, so this is a near-field or small-room speaker rather than one built to fill a living room. Each speaker’s Class D amplifier splits only 50W to the woofer and 50W to the tweeter, modest for the class. The DSP room-correction options are preset-based rather than a true microphone-measured calibration at the listening position, so results depend on picking settings that match your actual room.
Full Cambridge Audio L/R S review and specifications →
| Amplifier Power | 100W total (50W to woofer, 50W to tweeter, per speaker) |
|---|---|
| App | Yes |
| Bass Extension (-10dB) | 50Hz (measured, Erin's Audio Corner) |
| Bass Extension (-3dB) | 57Hz (measured, Erin's Audio Corner) |
| Bluetooth Codecs | SBC, AAC, aptX, aptX HD |
| DSP | Yes, room size, wall distance, and reflective surface correction; desktop-placement and near-wall/free-space switches |
| Dimensions | 5.3" (134 mm) W x 226mm H x 180mm D (each) |
| Drivers | 21mm aluminum dome tweeter, 3" long-throw woofer |
| Frequency Response | 55Hz - 24kHz (±3dB, manufacturer specified) |
| Inputs | RCA, optical digital, USB-C |
| Outputs | Subwoofer, wired speaker-to-speaker link |
| Subwoofer Output | Yes |
| Weight | 6.6 lbs (3.0kg) primary speaker, 5.7 lbs (2.6kg) secondary speaker |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
- Cambridge Audio L/R S vs Adam Audio D3v
- Cambridge Audio L/R S vs IK Multimedia iLoud Micro Monitor
- Cambridge Audio L/R S vs Edifier M60
- Cambridge Audio L/R S vs Genelec 8010A
- Cambridge Audio L/R S vs HiVi Swan X3
- Cambridge Audio L/R S vs Edifier MR3
- Cambridge Audio L/R S vs Klipsch ProMedia Lumina
- Cambridge Audio L/R S vs Mackie CR3-X
- See all 9 comparisons
Fiio SP3: $299.99 per pair Amazon eBay
Pros: Compact cabinets and angled bases fit a small desk. The existing review found useful dynamic capability at higher frequencies, so lack of output is not the only issue. Erin’s Klippel data shows a measured -3dB bass point around 60Hz, deeper than several similarly sized alternatives. Measured bass extension of 59Hz (-3dB).
Cons: The response rises strongly toward the treble, about 1.13dB per octave, with a recessed midrange and problematic crossover behavior. Its 2.71 standalone and 5.32 ideal-subwoofer scores do not capture the full practical impact of the review’s boomy bass and off-axis tonal problems. Changing angle trades one coloration for another. Those audible limitations weigh against it more heavily than its numerical score or build quality.
Full Fiio SP3 review and specifications →
| Amplifier Power | 40W total (30W midwoofer + 10W tweeter) |
|---|---|
| Bass Extension (-10dB) | 53Hz (measured, Erin's Audio Corner) |
| Bass Extension (-3dB) | 59Hz (measured, Erin's Audio Corner) |
| Dimensions | 6.4"H x 4.7"W x 5.2"D (163 x 120 x 132 mm) |
| Drivers | 3.5" carbon fiber midwoofer, 1" silk dome tweeter |
| Inputs | AUX, RCA |
| Spinorama Preference Score | 2.71 |
| Spinorama Preference Score with Perfect Sub | 5.32 |
| Weight | 4.3 lbs (1.95 kg) each |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons