Short answer: the JBL 305P MKII for better sound quality, the Dayton Audio M4 for the lower price. The JBL 305P MKII ranks #11 of 58 powered bookshelf speakers at $319. The Dayton Audio M4 ranks #28 at $249.98, $69.02 cheaper.
What the JBL 305P MKII offers: A fantastic value in studio monitors. Extremely close to the Focal Alpha 50 EVO, almost indistinguishable. Surprisingly deep and wide soundstage. Good horizontal dispersion (~70 degrees). Has a proper limiter that controls output cleanly rather than crudely cutting bass, and holds up well under sustained loud playback with minimal thermal compression. Watch for: Possible slight hissing from the amps at low levels. Rear ported, can be an issue close to walls. A port resonance around 1.6kHz is audible and distracting on some tracks. Midrange is somewhat scooped rather than flat for a studio monitor, and treble runs about 1.5dB hot - Erin’s Audio Corner recommends using the -2dB treble shelf switch. Vertical dispersion narrows around the crossover, so try to stay within about 10 degrees of the tweeter axis.
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 305P MKII if sound quality matters more than the price. Buy the Dayton Audio M4 if the price matters more than sound quality.
Specifications Side By Side
| JBL 305P MKII | Dayton Audio M4 | |
|---|---|---|
| Price | $319.00 | $249.98 |
| Ranked | #11 of 58 in Medium Size Powered Bookshelf Speakers | #28 of 58 in Medium Size Powered Bookshelf Speakers |
| Dimensions | 11.7"H x 7.3"W x 9.1"D (297.2 x 185.4 x 231.1 mm) | 5" x 6.5" x 9.5" (127 x 165 x 241 mm) (W x D x H) |
| Frequency Response | 49 Hz - 20 kHz (+-3 dB) (Manufacturer specified) | 40Hz - 20kHz (Manufacturer specified) |
| Bass Extension (-3dB) | 50Hz (measured, Erin’s Audio Corner) | 121Hz (measured, Erin’s Audio Corner) |
| Bass Extension (-10dB) | 43Hz (measured, Erin’s Audio Corner) | 60Hz (measured, Erin’s Audio Corner) |
| Inputs | XLR, TRS | - |
| Weight | 10.4 lbs / 4.7 kg each | 6.2 lbs / 2.81 kg (active), 5.1 lbs / 2.31 kg (passive) |
| Drivers | 5" (127mm) woofer | 4" aluminum woofer, 1" silk dome tweeter |
| App | No | No |
| Bluetooth | No | - |
| EQ | Yes (Room adjustment) | - |
| Output Power | 81w Per Speaker | 75W RMS (150W peak) |
| Sensitivity | 91.1dB (measured at 0.3V/1m, Erin’s Audio Corner) | - |
| 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 24, 2026 at 6:53 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 305P MKII: $319.00 Amazon eBay
Pros: A fantastic value in studio monitors. Extremely close to the Focal Alpha 50 EVO, almost indistinguishable. Surprisingly deep and wide soundstage. Good horizontal dispersion (~70 degrees). Has a proper limiter that controls output cleanly rather than crudely cutting bass, and holds up well under sustained loud playback with minimal thermal compression.
Cons: Possible slight hissing from the amps at low levels. Rear ported, can be an issue close to walls. A port resonance around 1.6kHz is audible and distracting on some tracks. Midrange is somewhat scooped rather than flat for a studio monitor, and treble runs about 1.5dB hot - Erin’s Audio Corner recommends using the -2dB treble shelf switch. Vertical dispersion narrows around the crossover, so try to stay within about 10 degrees of the tweeter axis.
Full JBL 305P MKII review and specifications →
| App | No |
|---|---|
| Bass Extension (-10dB) | 43Hz (measured, Erin's Audio Corner) |
| Bass Extension (-3dB) | 50Hz (measured, Erin's Audio Corner) |
| Bluetooth | No |
| Dimensions | 11.7"H x 7.3"W x 9.1"D (297.2 x 185.4 x 231.1 mm) |
| Drivers | 5" (127mm) woofer |
| EQ | Yes (Room adjustment) |
| Frequency Response | 49 Hz - 20 kHz (+-3 dB) (Manufacturer specified) |
| Inputs | XLR, TRS |
| Output Power | 81w Per Speaker |
| Sensitivity | 91.1dB (measured at 0.3V/1m, Erin's Audio Corner) |
| Weight | 10.4 lbs / 4.7 kg each |
- Links
- Reviews, Comparisons and Sound Samples
- Erin’s Audio Corner Review Measurements More from Erin’s Audio Corner →
- Audio Science Review Measurements More from Audio Science Review →
- Erin’s Audio Corner: LIVE! JBL 305P MkII Powered Studio Monitor Review
- DSAUDIO.review: DSAUDIO.review Focal Alpha 50 EVO vs JBL 305P MKII sound.DEMO More from DSAUDIOreview →
- DSAUDIO.review: JBL 305P MKII vs Yamaha HS5 6-Track Comparison
- DSAUDIO.review: DSAUDIO.review JBL 305P MKII vs KRK Classic 5 CL5G3 sound.DEMO
- DSAUDIO.review: JBL 305P MKII vs Adam Audio T5V 6-Track Comparison
- DSAUDIO.review: DSAUDIO.review Adam Audio A5X vs JBL 305P MKII sound.DEMO
- DSAUDIO.review: DSAUDIO.review Kali Audio LP-6 V2 (2nd Wave) vs JBL 305P MKII sound.DEMO
- DSAUDIO.review: DSAUDIO.review Edifier MR4 vs JBL 305P MKII sound.DEMO
- DSAUDIO.review: Kali Audio IN-5 vs JBL 305P MKII Sound & Frequency Response Comparison
- DSAUDIO.review: JBL 308P MKII vs JBL 305P MKII Sound & Frequency Response Comparison
- DSAUDIO.review: Neumann KH80 DSP vs JBL 305P MKII Sound & Frquency Response Comparison
- DSAUDIO.review: JBL 305P MKII vs PreSonus Eris E5 6-Track Comparison
- Erin’s Audio Corner Measurements (spinorama.org)
- Reddit Search for JBL 305P MKII Review
- Head-to-Head Comparisons
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) |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
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- Dayton Audio M4 vs Kali Audio IN-5
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