Short answer: the Audioengine A5+ Classic for better sound quality, the Dayton Audio M4 for the lower price. The Audioengine A5+ Classic ranks #27 of 64 powered bookshelf speakers at $399. The Dayton Audio M4 ranks #37 at $249.98, $149.02 cheaper.
What the Audioengine A5+ Classic offers: CEA2034 spinorama shows a reasonably flat response outside of the upper bass. Internal Class AB amplification (50W RMS, 75W peak) with a linear power supply drives a 5” Kevlar woofer and 0.75” tweeter. Watch for: A valley in the upper bass (200-400Hz) recesses that range, and a distortion peak shows up around 800-900Hz even at 86dB SPL. Off-axis response doesn’t track the on-axis curve well through the crossover, suggesting the waveguide isn’t fully optimized. Resonances appear at 900Hz and 4.4kHz.
What the Dayton Audio M4 offers: Good build quality. Has a subwoofer output for extending the low end. Overall linearity is decent for the price. Avoids sibilance since it’s slightly recessed right in the harsh 4-8kHz region. Watch for: The amplifier is only in the left speaker, so it’s not separate amps in each unit. Bass doesn’t extend very deep, and unlike some rivals it doesn’t use DSP to boost the low end. Sounds noticeably different up close versus at a normal listening distance, with a softer treble near field and a more recessed upper midrange farther away. Limited output headroom - distortion rises sharply above about 93dB, so it’s better suited to near-field or desktop use than as a far-field living-room speaker.
Buy the Audioengine A5+ Classic when sound quality outweighs the price for you, and the Dayton Audio M4 when the price outweighs sound quality instead.
Specifications Side By Side
| Audioengine A5+ Classic | Dayton Audio M4 | |
|---|---|---|
| Price | $399.00 | $249.98 |
| Ranked | #27 of 64 in Medium Size Powered Bookshelf Speakers | #37 of 64 in Medium Size Powered Bookshelf Speakers |
| Bass Extension (-3dB) | 68Hz (measured, Audio Science Review) | 121Hz (measured, Erin’s Audio Corner) |
| Bass Extension (-10dB) | 50Hz (measured, Audio Science Review) | 60Hz (measured, Erin’s Audio Corner) |
| Dimensions | 10.9"H x 7.2"W x 9.7"D (276.2 x 182.6 x 247.6 mm) | 5" x 6.5" x 9.5" (127 x 165 x 241 mm) (W x D x H) |
| Frequency Response | 50Hz - 22kHz (+/-1.5dB) (Manufacturer specified) | 40Hz - 20kHz (Manufacturer specified) |
| Weight | 15.4 lbs / 7 kg (left/powered), 9.7 lbs / 4.4 kg (right) | 6.2 lbs / 2.81 kg (active), 5.1 lbs / 2.31 kg (passive) |
| Drivers | 5" Kevlar woofer, 0.75" silk dome tweeter | 4" aluminum woofer, 1" silk dome tweeter |
| App | No | No |
| EQ | No | - |
| DSP | No | - |
| Output Power | 50W RMS / 75W peak | 75W RMS (150W peak) |
| Bluetooth Version | - | 5.0 |
| Bluetooth Codecs | - | SBC, aptX |
| Digital Aux Input | - | Yes (USB-C DAC, up to 192kHz/32-bit) |
| Aux Input | - | Yes (RCA) |
| Stereo | - | Yes |
| Power Input | - | AC Power cord |
| Subwoofer Output | - | Yes (20Hz - 200Hz) |
| Discontinued | - | No |
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Prices on this page were last checked September 8, 2026 at 6:02 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
Audioengine A5+ Classic: $399.00 Amazon B&H Photo Video eBay
Pros: ASR’s A5+ Powered measurements give 3.68 standalone and 6.15 with an ideal subwoofer, with a 2.7dB midrange span. The analog powered pair is straightforward to use without an external amplifier. The measured result supports a more capable tonal balance than its former low position suggested.
Cons: The measured -3dB point is around 69Hz, and the upper-bass recession can reduce body in voices and instruments. The existing review reports crossover-region directivity errors and a distortion feature around 800-900Hz. The score does not make it a reference monitor, and adding a subwoofer cannot correct those midrange and off-axis issues.
Full Audioengine A5+ Classic review and specifications →
| App | No |
|---|---|
| Bass Extension (-10dB) | 50Hz (measured, Audio Science Review) |
| Bass Extension (-3dB) | 68Hz (measured, Audio Science Review) |
| DSP | No |
| Dimensions | 10.9"H x 7.2"W x 9.7"D (276.2 x 182.6 x 247.6 mm) |
| Drivers | 5" Kevlar woofer, 0.75" silk dome tweeter |
| EQ | No |
| Frequency Response | 50Hz - 22kHz (+/-1.5dB) (Manufacturer specified) |
| Output Power | 50W RMS / 75W peak |
| Weight | 15.4 lbs / 7 kg (left/powered), 9.7 lbs / 4.4 kg (right) |
- Links
- Reviews, Comparisons and Sound Samples
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Dayton Audio M4: $249.98 Parts Express eBay
Pros: A compact powered pair with a subwoofer output, useful source connections and a solid cabinet. The existing review describes reasonable linearity for the price and a subdued upper treble that avoids an aggressively bright presentation. It is best considered for a close desktop setup.
Cons: Existing listening and output notes describe limited bass, a balance that changes with distance, and distortion rising above roughly 93dB. The soft treble is a tonal preference, not evidence of reference neutrality; a subwoofer does not establish greater midrange headroom.
Full Dayton Audio M4 review and specifications →
| App | No |
|---|---|
| Aux Input | Yes (RCA) |
| Bass Extension (-10dB) | 60Hz (measured, Erin's Audio Corner) |
| Bass Extension (-3dB) | 121Hz (measured, Erin's Audio Corner) |
| Bluetooth Codecs | SBC, aptX |
| Bluetooth Version | 5.0 |
| Digital Aux Input | Yes (USB-C DAC, up to 192kHz/32-bit) |
| Dimensions | 5" x 6.5" x 9.5" (127 x 165 x 241 mm) (W x D x H) |
| Discontinued | No |
| Drivers | 4" aluminum woofer, 1" silk dome tweeter |
| Frequency Response | 40Hz - 20kHz (Manufacturer specified) |
| Output Power | 75W RMS (150W peak) |
| Power Input | AC Power cord |
| Stereo | Yes |
| Subwoofer Output | Yes (20Hz - 200Hz) |
| Weight | 6.2 lbs / 2.81 kg (active), 5.1 lbs / 2.31 kg (passive) |
- Links
- Reviews, Comparisons and Sound Samples
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