Short answer: the Dayton Audio M4 for better sound quality, the JBL One Series 104 for the lower price. The Dayton Audio M4 ranks #28 of 64 powered bookshelf speakers at $249.98. The JBL One Series 104 ranks #62 at $129, $120.98 cheaper.
What the JBL One Series 104 offers: Heavy internal EQ from the amplifier meaningfully compensates for otherwise poor raw driver measurements, and casual listening on undemanding content sounded like a scaled-down JBL 305P Mark II - well above typical computer-speaker quality for the price. Solid build quality for a $90-130 powered pair with dual built-in amplifiers. Watch for: Measuring the passive drivers alone (bypassing the amplifier’s EQ) showed “no bass, no low mids, and highly irregular highs” - a disaster by the reviewer’s description. Even with the amplifier’s correction applied, there’s an on-axis cancellation around 7.4kHz from the coaxial driver design, and JBL’s own published frequency-response graph uses a compressed 95dB vertical scale that hides real deviations the reviewer’s 50dB-scale CEA-2034 measurement reveals. Female vocals and “lisping” content became bright and annoying; the reviewer’s verdict was “can’t recommend it though if you want a true hi-fi experience.”
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 JBL One Series 104 if the price matters more than sound quality. Buy the Dayton Audio M4 if sound quality matters more than the price.
If sound quality matters at all to you, skip the JBL One Series 104. It ranks near the bottom of the 64 powered bookshelf speakers, so look higher up the list instead.
Specifications Side By Side
| JBL One Series 104 | Dayton Audio M4 | |
|---|---|---|
| Price | $129 | $249.98 |
| Ranked | #62 of 64 in Medium Size Powered Bookshelf Speakers | #28 of 64 in Medium Size Powered Bookshelf Speakers |
| Bass Extension (-3dB) | 45Hz with the amplifier’s DSP bass boost active (measured, Audio Science Review) | 121Hz (measured, Erin’s Audio Corner) |
| Bass Extension (-10dB) | 35Hz with the amplifier’s DSP bass boost active (measured, Audio Science Review) | 60Hz (measured, Erin’s Audio Corner) |
| Drivers | 4.5" coaxial low-frequency driver, 0.75" soft dome tweeter | 4" aluminum woofer, 1" silk dome tweeter |
| Dimensions | 9.7H x 6W x 4.9D in (per manufacturer, 104-BT) | 5" x 6.5" x 9.5" (127 x 165 x 241 mm) (W x D x H) |
| Weight | 4.5 lbs / 2.06 kg (master), 3.8 lbs / 1.73 kg (slave) | 6.2 lbs / 2.81 kg (active), 5.1 lbs / 2.31 kg (passive) |
| Frequency Response | 60Hz - 20kHz (Manufacturer specified) | 40Hz - 20kHz (Manufacturer specified) |
| Output Power | 60W total Class D (30W per speaker) | 75W RMS (150W peak) |
| App | No | No |
| EQ | Yes (fixed, amplifier-applied) | - |
| DSP | Yes | - |
| 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 August 25, 2026 at 6:19 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
JBL One Series 104: $129 Amazon eBay
Pros: Heavy internal EQ from the amplifier meaningfully compensates for otherwise poor raw driver measurements, and casual listening on undemanding content sounded like a scaled-down JBL 305P Mark II - well above typical computer-speaker quality for the price. Solid build quality for a $90-130 powered pair with dual built-in amplifiers.
Cons: Measuring the passive drivers alone (bypassing the amplifier’s EQ) showed “no bass, no low mids, and highly irregular highs” - a disaster by the reviewer’s description. Even with the amplifier’s correction applied, there’s an on-axis cancellation around 7.4kHz from the coaxial driver design, and JBL’s own published frequency-response graph uses a compressed 95dB vertical scale that hides real deviations the reviewer’s 50dB-scale CEA-2034 measurement reveals. Female vocals and “lisping” content became bright and annoying; the reviewer’s verdict was “can’t recommend it though if you want a true hi-fi experience.”
Full JBL One Series 104 review and specifications →
| App | No |
|---|---|
| Bass Extension (-10dB) | 35Hz with the amplifier's DSP bass boost active (measured, Audio Science Review) |
| Bass Extension (-3dB) | 45Hz with the amplifier's DSP bass boost active (measured, Audio Science Review) |
| DSP | Yes |
| Dimensions | 9.7H x 6W x 4.9D in (per manufacturer, 104-BT) |
| Drivers | 4.5" coaxial low-frequency driver, 0.75" soft dome tweeter |
| EQ | Yes (fixed, amplifier-applied) |
| Frequency Response | 60Hz - 20kHz (Manufacturer specified) |
| Output Power | 60W total Class D (30W per speaker) |
| Weight | 4.5 lbs / 2.06 kg (master), 3.8 lbs / 1.73 kg (slave) |
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Dayton Audio M4: $249.98 Parts Express eBay
Pros: 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.
Cons: 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.
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) |
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