Short answer: the JBL 305P MKII. It ranks #18 of 105 powered bookshelf speakers by sound quality, rated 4.3/5, at $289; the Adam Audio A4V ranks #66, rated 3.6/5, and costs $1,079.98, which makes this an easy call rather than a real tradeoff.
The JBL 305P MKII is the more accurate option. Erin’s Klippel data gives 5.38 standalone and 7.52 with an ideal subwoofer, with bass reaching -3dB around 51Hz. Its measured preference score, a predictor of how neutral it sounds, is 5.38 against 3.92 for the Adam Audio A4V. Watch for: The 3.3dB midrange span and rising response show it is not perfectly neutral.
What the Adam Audio A4V does well: Compact monitor with onboard DSP, placement controls and room-correction integration. The tradeoff: A small average-deviation figure hides a major localized response irregularity: the selected measurement spans 10.8dB from 300Hz to 5kHz, and listening-window narrow-band deviation is 0.547.
Buy the JBL 305P MKII. It is rated higher for sound quality than the Adam Audio A4V and costs less, so only choose the other one for a particular feature it does better.
Still deciding? The full Powered Home rankings cover every ranked option.
Specifications Side By Side
| JBL 305P MKII | Adam Audio A4V | |
|---|---|---|
| Price | $289.00 per pair | $1,079.98 per pair |
| Ranked | #18 of 105 in Medium Size Powered Bookshelf Speakers | #66 of 105 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) | 10.6H x 6.2W x 8.7D in |
| Frequency Response | 49 Hz - 20 kHz (+-3 dB) (Manufacturer specified) | 58Hz - 41kHz (-3dB) (Manufacturer specified) |
| Bass Extension (-3dB) | 50Hz (measured, Erin’s Audio Corner) | - |
| Bass Extension (-10dB) | 43Hz (measured, Erin’s Audio Corner) | - |
| Inputs | XLR, TRS | XLR and RCA; Ethernet for control |
| Weight | 10.4 lbs (4.7 kg) each | 12.8 lbs (5.8 kg) each |
| Drivers | 5” (127mm) woofer | X-ART folded-ribbon tweeter, 4” MLM woofer |
| App | No | - |
| Bluetooth | No | No |
| EQ | Yes (Room adjustment) | - |
| Amplifier Power | 81w Per Speaker | 130W RMS each |
| Sensitivity | 91.1dB (measured at 0.3V/1m, Erin’s Audio Corner) | - |
| Spinorama Preference Score | 5.38 | 3.92 |
| Spinorama Preference Score with Perfect Sub | 7.52 | 6.33 |
| XLR Input | Yes | Yes |
| RCA Input | No | Yes |
| TRS Input | Yes | No |
| Optical Input | No | No |
| Coaxial Input | No | No |
| USB Input | No | No |
| HDMI Input | No | No |
| AES Input | No | No |
| Aux Input | No | No |
| Enclosure | - | 2-way active, dual front ports |
Related Speaker Comparisons
How JBL 305P MKII compares with other leading options:
- Genelec 8331A vs JBL 305P MKII
- JBL 305P MKII vs Neumann KH120 MKII
- Genelec 8030C vs JBL 305P MKII
- JBL 305P MKII vs Neumann KH80 DSP
- JBL 305P MKII vs Reflector Audio Square Two
Prices on this page were last checked October 9, 2026 at 8:01 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: $289.00 per pair Amazon eBay
Older model: the JBL LSR305 (ranked lower, rated 4.2/5).
Same family: the JBL 306P MKII (larger bookshelf, rated 4.1/5) and the JBL 308P MKII (larger bookshelf, rated 4.4/5).
Pros: Erin’s Klippel data gives 5.38 standalone and 7.52 with an ideal subwoofer, with bass reaching -3dB around 51Hz. Broad horizontal coverage and reasonably smooth reflected sound support stable imaging across a desk. The existing review reports effective limiting and little sustained thermal compression, making it a strong budget-monitor option rather than just a speaker with a promising frequency curve. Measured bass extension of 50Hz (-3dB), with a measured sensitivity of 91.1dB.
Cons: The 3.3dB midrange span and rising response show it is not perfectly neutral. A port-related feature around 1.6kHz and some excess treble can be audible; the review recommends the treble-trim switch. Vertical crossover interference makes ear height important. Amplifier hiss may matter in very quiet nearfield use, and rear-port placement needs room-boundary adjustment.
Full JBL 305P MKII review and specifications →
| AES Input | No |
|---|---|
| Amplifier Power | 81w Per Speaker |
| App | No |
| Aux Input | No |
| Bass Extension (-10dB) | 43Hz (measured, Erin’s Audio Corner) |
| Bass Extension (-3dB) | 50Hz (measured, Erin’s Audio Corner) |
| Bluetooth | No |
| Coaxial Input | 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) |
| HDMI Input | No |
| Inputs | XLR, TRS |
| Optical Input | No |
| RCA Input | No |
| Sensitivity | 91.1dB (measured at 0.3V/1m, Erin’s Audio Corner) |
| Spinorama Preference Score | 5.38 |
| Spinorama Preference Score with Perfect Sub | 7.52 |
| TRS Input | Yes |
| USB Input | No |
| Weight | 10.4 lbs (4.7 kg) each |
| XLR Input | Yes |
- 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)
- Jasper Tech: Best Desktop Computer Speakers for Every Budget – 2026 More from Jasper Tech →
- Jasper Tech: Best Powered Bookshelf Speakers for Every Budget - 2025
- Jasper Tech: Are the iLoud Micro Monitor Pro the Best Studio Monitor Speakers for your Home Studio?
- Head-to-Head Comparisons
- JBL 305P MKII vs KEF LS50 Wireless II
- JBL 305P MKII vs Klipsch The Fives
- JBL 305P MKII vs Vanatoo Transparent One Encore Plus
- JBL 305P MKII vs Genelec 8020D
- JBL 305P MKII vs IK Multimedia iLoud MTM MKII
- JBL 305P MKII vs Topping MA4
- JBL 305P MKII vs Sigberg Audio SBS Gen 2
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- See all 66 comparisons
Adam Audio A4V: $1,079.98 per pair Amazon B&H Photo Video eBay
Older model: the Adam A5X (ranked higher, rated 3.7/5).
Same family: the ADAM Audio A44H (larger bookshelf, ranked higher, estimated 3.8/5), the Adam Audio A7V (larger bookshelf, rated 4/5), the ADAM Audio A8H (larger bookshelf, estimated 4.4/5) and the ADAM Audio A77H (larger bookshelf, estimated 4.4/5).
Pros: Compact monitor with onboard DSP, placement controls and room-correction integration. ASR’s Klippel data gives a -3dB point around 59Hz and preference scores of 3.92 standalone and 6.33 with an ideal subwoofer. Its adjustment facilities are useful when placement or tonal correction is needed.
Cons: A small average-deviation figure hides a major localized response irregularity: the selected measurement spans 10.8dB from 300Hz to 5kHz, and listening-window narrow-band deviation is 0.547. The native response should therefore not be called smoothly neutral. Correction potential is not the same as stock performance, and analog audio inputs mean a separate interface is needed for USB sources.
Full Adam Audio A4V review and specifications →
| AES Input | No |
|---|---|
| Amplifier Power | 130W RMS each |
| Aux Input | No |
| Bluetooth | No |
| Coaxial Input | No |
| Dimensions | 10.6H x 6.2W x 8.7D in |
| Drivers | X-ART folded-ribbon tweeter, 4” MLM woofer |
| Enclosure | 2-way active, dual front ports |
| Frequency Response | 58Hz - 41kHz (-3dB) (Manufacturer specified) |
| HDMI Input | No |
| Inputs | XLR and RCA; Ethernet for control |
| Optical Input | No |
| RCA Input | Yes |
| Spinorama Preference Score | 3.92 |
| Spinorama Preference Score with Perfect Sub | 6.33 |
| TRS Input | No |
| USB Input | No |
| Weight | 12.8 lbs (5.8 kg) each |
| XLR Input | Yes |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons