Short answer: the Monacor SOUND-4BT. It ranks #13 of 24 powered bookshelf speakers by sound quality, rated 3.3/5, at $310; the Audioengine HD3 ranks #17, rated 3.2/5, and costs $359, so there is not much of a tradeoff to weigh.
The case for the Monacor SOUND-4BT: The available measurements suggest useful bass for its size, with a -3dB point around 61Hz, and a fairly small 2.8dB response span from 300Hz to 5kHz. The tradeoff: Predicted in-room response remains uneven despite the modest midrange span.
The case for the Audioengine HD3: A compact desktop stereo option when cabinet size is a priority. The catch: Limited bass makes a subwoofer useful for fuller music reproduction.
Buy the Monacor SOUND-4BT. It is rated higher for sound quality than the Audioengine HD3 and costs less, so the other one has nothing left to offer.
Looking for alternatives? See the complete Powered Home rankings.
Specifications Side By Side
| Monacor SOUND-4BT | Audioengine HD3 | |
|---|---|---|
| Price | $310 per pair | $359.00 per pair |
| Ranked | #13 of 24 in Small Size Powered Bookshelf Speakers | #17 of 24 in Small Size Powered Bookshelf Speakers |
| Enclosure | 2-way powered stereo pair, bass reflex | - |
| Drivers | 1" dome tweeter, 4" woofer | 2.75" woofer, 0.75" silk dome tweeter |
| Dimensions | 8.5H x 5.5W x 6.7D in | 9"H x 5.5"W x 6.5"D (228.6 x 139.7 x 165.1 mm) |
| Weight | 11.5 lbs (5.2 kg)/pair | 7.3 lbs (3.3 kg) |
| Amplifier Power | 2 x 30W RMS | 30W total (15W per speaker) |
| Inputs | Bluetooth 4.0 aptX, optical, RCA, 3.5mm | Bluetooth, Aux, RCA Input |
| Bluetooth Codecs | SBC, aptX | SBC, aptX |
| Spinorama Preference Score | 3.58 | - |
| Spinorama Preference Score with Perfect Sub | 6.10 | - |
| Subwoofer Output | Yes | Yes |
| Outputs | Subwoofer | 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 | No | No |
| HDMI Input | No | No |
| AES Input | No | No |
| Aux Input | Yes | Yes |
| Bluetooth | Yes, 4.0 | Yes |
| Frequency Response | 45Hz - 20kHz (Manufacturer specified) | 65 Hz-20 kHz (-3dB) (Manufacturer specified) |
| App | - | No |
| Bass Extension (-10dB) | - | 58Hz |
| Bass Extension (-3dB) | - | 65Hz |
| Bluetooth Version | - | 5.0 |
| EQ | - | No |
| Maximum SPL | - | 90dB @ 1m (manufacturer specified) |
Related Speaker Comparisons
How Monacor SOUND-4BT compares with other leading options:
- Cambridge Audio L/R S vs Monacor SOUND-4BT
- HiVi Swan X3 vs Monacor SOUND-4BT
- Sovox MiniMax3 vs Monacor SOUND-4BT
- Bowers & Wilkins Formation Flex vs Monacor SOUND-4BT
- Monacor SOUND-4BT vs Audioengine A2+
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
Monacor SOUND-4BT: $310 per pair LTT Versand eBay
Pros: The available measurements suggest useful bass for its size, with a -3dB point around 61Hz, and a fairly small 2.8dB response span from 300Hz to 5kHz. Optical and analog inputs, Bluetooth, remote control and a subwoofer output make it versatile for a compact stereo setup.
Cons: Predicted in-room response remains uneven despite the modest midrange span. A subwoofer can add bass reach but does not correct the remaining tonal variations.
Full Monacor SOUND-4BT review and specifications →
| AES Input | No |
|---|---|
| Amplifier Power | 2 x 30W RMS |
| Aux Input | Yes |
| Bluetooth | Yes, 4.0 |
| Bluetooth Codecs | SBC, aptX |
| Coaxial Input | No |
| Dimensions | 8.5H x 5.5W x 6.7D in |
| Drivers | 1" dome tweeter, 4" woofer |
| Enclosure | 2-way powered stereo pair, bass reflex |
| Frequency Response | 45Hz - 20kHz (Manufacturer specified) |
| HDMI Input | No |
| Inputs | Bluetooth 4.0 aptX, optical, RCA, 3.5mm |
| Optical Input | Yes |
| Outputs | Subwoofer |
| RCA Input | Yes |
| Spinorama Preference Score | 3.58 |
| Spinorama Preference Score with Perfect Sub | 6.10 |
| Subwoofer Output | Yes |
| TRS Input | No |
| USB Input | No |
| Weight | 11.5 lbs (5.2 kg)/pair |
| XLR Input | No |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
- Monacor SOUND-4BT vs Kanto YU4
- Monacor SOUND-4BT vs Audioengine A2+
- Monacor SOUND-4BT vs Bowers & Wilkins Formation Flex
- Monacor SOUND-4BT vs Klipsch ProMedia Lumina
- Monacor SOUND-4BT vs Monoprice Monolith MM-3
- Monacor SOUND-4BT vs Sovox MiniMax3
- Monacor SOUND-4BT vs HiVi Swan X3
- Monacor SOUND-4BT vs Fluid Audio C35BT
- See all 10 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 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
- Audioengine HD3 vs Edifier MR3
- See all 18 comparisons