Short answer: the Cambridge Audio L/R S. It ranks #4 of 24 powered bookshelf speakers by sound quality, rated 4.4/5, at $549. The Audioengine HD3 ranks #17, rated 3.2/5, at $359, $190 cheaper, which does not close the gap in sound quality.
Why pick the Cambridge Audio L/R S: 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. 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.
The case for the Audioengine HD3: A compact desktop stereo option when cabinet size is a priority. The tradeoff: Limited bass makes a subwoofer useful for fuller music reproduction.
Buy the Cambridge Audio L/R S. It is rated higher for sound quality, and the $190 you would save on the Audioengine HD3 does not close the gap.
Want more options? Browse the full Powered Home rankings.
Specifications Side By Side
| Cambridge Audio L/R S | Audioengine HD3 | |
|---|---|---|
| Price | $549.00 per pair | $359.00 per pair |
| Ranked | #4 of 24 in Small Size Powered Bookshelf Speakers | #17 of 24 in Small Size Powered Bookshelf Speakers |
| Bass Extension (-3dB) | 57Hz (measured, Erin's Audio Corner) | 65Hz |
| Bass Extension (-10dB) | 50Hz (measured, Erin's Audio Corner) | 58Hz |
| Drivers | 21mm aluminum dome tweeter, 3" long-throw woofer | 2.75" woofer, 0.75" silk dome tweeter |
| Frequency Response | 55Hz - 24kHz (±3dB, manufacturer specified) | 65 Hz-20 kHz (-3dB) (Manufacturer specified) |
| Amplifier Power | 100W total (50W to woofer, 50W to tweeter, per speaker) | 30W total (15W per speaker) |
| Inputs | RCA, optical digital, USB-C | Bluetooth, Aux, RCA Input |
| Bluetooth Codecs | SBC, AAC, aptX, aptX HD | SBC, aptX |
| App | Yes | No |
| 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) | 9"H x 5.5"W x 6.5"D (228.6 x 139.7 x 165.1 mm) |
| Weight | 6.6 lbs (3.0kg) primary speaker, 5.7 lbs (2.6kg) secondary speaker | 7.3 lbs (3.3 kg) |
| Subwoofer Output | Yes | Yes |
| Outputs | Subwoofer, wired speaker-to-speaker link | RCA variable output (subwoofer) |
| XLR Input | No | No |
| RCA Input | Yes | Yes |
| TRS Input | No | No |
| Optical Input | Yes | No |
| Coaxial Input | No | No |
| USB Input | Yes | No |
| HDMI Input | No | No |
| AES Input | No | No |
| Aux Input | No | Yes |
| Bluetooth | Yes | Yes |
| Bluetooth Version | - | 5.0 |
| EQ | - | No |
| Maximum SPL | - | 90dB @ 1m (manufacturer specified) |
Related Speaker Comparisons
How Cambridge Audio L/R S compares with other leading options:
- Cambridge Audio L/R S vs Audio Smile Little British Monitor
- 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
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.
As an eBay Partner, we may be compensated if you make a purchase.
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 →
| AES Input | No |
|---|---|
| Amplifier Power | 100W total (50W to woofer, 50W to tweeter, per speaker) |
| App | Yes |
| Aux Input | No |
| Bass Extension (-10dB) | 50Hz (measured, Erin's Audio Corner) |
| Bass Extension (-3dB) | 57Hz (measured, Erin's Audio Corner) |
| Bluetooth | Yes |
| Bluetooth Codecs | SBC, AAC, aptX, aptX HD |
| Coaxial Input | No |
| 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) |
| HDMI Input | No |
| Inputs | RCA, optical digital, USB-C |
| Optical Input | Yes |
| Outputs | Subwoofer, wired speaker-to-speaker link |
| RCA Input | Yes |
| Subwoofer Output | Yes |
| TRS Input | No |
| USB Input | Yes |
| Weight | 6.6 lbs (3.0kg) primary speaker, 5.7 lbs (2.6kg) secondary speaker |
| XLR Input | No |
- 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 Audio Smile Little British Monitor
- Cambridge Audio L/R S vs Edifier MR3
- Cambridge Audio L/R S vs Sovox MiniMax3
- See all 16 comparisons
Audioengine HD3: $359.00 per pair Amazon eBay
Pros: A compact desktop stereo option when cabinet size is a priority. Measured bass extension of 65Hz (-3dB).
Cons: Limited bass makes a subwoofer useful for fuller music reproduction. Its compact format is better suited to close listening than filling a large room.
Full Audioengine HD3 review and specifications →
| AES Input | No |
|---|---|
| Amplifier Power | 30W total (15W per speaker) |
| App | No |
| Aux Input | Yes |
| Bass Extension (-10dB) | 58Hz |
| Bass Extension (-3dB) | 65Hz |
| Bluetooth | Yes |
| Bluetooth Codecs | SBC, aptX |
| Bluetooth Version | 5.0 |
| Coaxial Input | No |
| Dimensions | 9"H x 5.5"W x 6.5"D (228.6 x 139.7 x 165.1 mm) |
| Drivers | 2.75" woofer, 0.75" silk dome tweeter |
| EQ | No |
| Frequency Response | 65 Hz-20 kHz (-3dB) (Manufacturer specified) |
| HDMI Input | No |
| Inputs | Bluetooth, Aux, RCA Input |
| Maximum SPL | 90dB @ 1m (manufacturer specified) |
| Optical Input | No |
| Outputs | RCA variable output (subwoofer) |
| RCA Input | Yes |
| Subwoofer Output | Yes |
| TRS Input | No |
| USB Input | No |
| Weight | 7.3 lbs (3.3 kg) |
| XLR Input | No |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
- Audioengine HD3 vs Monoprice Monolith MM-3
- Audioengine HD3 vs Fluid Audio C35BT
- Audioengine HD3 vs Kanto YU4
- Audioengine HD3 vs Monacor SOUND-4BT
- Audioengine HD3 vs M-Audio BX3
- Audioengine HD3 vs Presonus Eris E3.5 2nd Gen
- Audioengine HD3 vs Bowers & Wilkins Formation Flex
- Audioengine HD3 vs Midiplus MI3 II
- See all 18 comparisons