Short answer: the Q Acoustics 3030c. It ranks #42 of 168 bookshelf speakers by sound quality, rated 3.8/5, at $819; the PSB Imagine B50 ranks #52, rated 3.7/5, and costs $999, so there is not much of a tradeoff to weigh.
What the Q Acoustics 3030c does well: The current 3000c series standmount, with a 5.5” mid/bass driver and 0.9” tweeter in a 12.5 litre ported cabinet, rated down to 48Hz (-6dB). Watch for: No independent measurements yet, so its tonal balance and directivity can’t be compared directly with measured speakers; the rating is estimated from its measured predecessor.
What the PSB Imagine B50 does well: The standmount sibling to the PSB Imagine T65 tower, from PSB’s current 2023-refreshed Imagine line, using the same titanium-dome tweeter and woven-carbon-fiber woofer platform. The tradeoff: On-axis smoothness of just 0.235 and a deviation of 0.368dB are unremarkable for the price, with a +0.22dB per octave upward tilt giving it a brighter-leaning balance, a predicted in-room smoothness of just 0.35, and a Harman in-room bass extension estimate of only 49Hz.
Buy the Q Acoustics 3030c. It is rated higher for sound quality than the PSB Imagine B50 and costs less, so only choose the other one for a particular feature it does better.
About the ratings: the Q Acoustics 3030c’s rating is estimated from measured siblings and predecessors rather than its own measurements, with a likely range of 3.4 to 4.2, so this verdict could change once it is measured.
Want more options? Browse the full Passive Home rankings.
Specifications Side By Side
| Q Acoustics 3030c | PSB Imagine B50 | |
|---|---|---|
| Price | $819.00 per pair | $999 per pair |
| Ranked | #42 of 168 in Medium Size Bookshelf Speakers Estimated | #52 of 168 in Medium Size Bookshelf Speakers |
| Drivers | 0.9” (22mm) tweeter, 5.5” (142mm) mid/bass driver | 1” titanium dome tweeter (ferrofluid neodymium magnet), 5.25” woven carbon-fiber woofer |
| Frequency Response | 48Hz-30kHz -6dB (manufacturer specified) | - |
| Sensitivity | 86.5dB (2.83V/1m, manufacturer specified) | 85dB anechoic / 87dB in-room |
| Impedance | 6 ohms nominal, 3.9 ohms minimum (manufacturer specified) | 8 ohms nominal, 4 ohms minimum |
| Woofer Cabinet | ported | - |
| Dimensions | 12.8”H x 8.1”W x 13”D (324 x 205 x 329 mm) | 6.75W x 11.8H x 9.875D in |
| Weight | 16.5 lbs (7.5 kg) each | approx. 11.2 lbs (5.1 kg) each |
| DIY Kit | No | No |
| Enclosure | - | 2-way, bass-reflex with rear slot port |
| Country | - | Canada (design) |
| Spinorama Preference Score | - | 4.63 |
| Spinorama Preference Score with Perfect Sub | - | 6.92 |
| Bass Extension (-3dB) | - | 69.6Hz (measured, Erin’s Audio Corner via spinorama.org) |
| Bass Extension (-10dB) | - | 44.4Hz (derived, log-interpolated between spinorama.org -9dB/-12dB points) |
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- KEF Q150 vs PSB Imagine B50
Prices on this page were last checked October 11, 2026 at 4:59 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
Q Acoustics 3030c: $819.00 per pair Estimated Amazon eBay
Older model: the Q Acoustics 3030i (rated 4/5). See every Q Acoustics 3000 Series generation.
Same family: the Q Acoustics 3010c (smaller bookshelf, ranked lower, estimated 3.4/5), the Q Acoustics 3020c (smaller bookshelf, ranked lower, estimated 2.6/5), the Q Acoustics 3050c (floorstanding, estimated 4.2/5) and the Q Acoustics 3090c (center, estimated 3.5/5).
Pros: The current 3000c series standmount, with a 5.5” mid/bass driver and 0.9” tweeter in a 12.5 litre ported cabinet, rated down to 48Hz (-6dB).
Cons: No independent measurements yet, so its tonal balance and directivity can’t be compared directly with measured speakers; the rating is estimated from its measured predecessor. It uses a smaller woofer than the Q Acoustics 3030i, and its sibling Q Acoustics 3020c carries a modest estimate, so the range is wide. Sensitivity is 86.5dB and the impedance dips to 3.9 ohms.
Full Q Acoustics 3030c review and specifications →
| Released | Jan 2025 (1 year ago) |
|---|---|
| DIY Kit | No |
| Dimensions | 12.8”H x 8.1”W x 13”D (324 x 205 x 329 mm) |
| Drivers | 0.9” (22mm) tweeter, 5.5” (142mm) mid/bass driver |
| Frequency Response | 48Hz-30kHz -6dB (manufacturer specified) |
| Impedance | 6 ohms nominal, 3.9 ohms minimum (manufacturer specified) |
| Sensitivity | 86.5dB (2.83V/1m, manufacturer specified) |
| Weight | 16.5 lbs (7.5 kg) each |
| Woofer Cabinet | ported |
- Links
- Reviews, Comparisons and Sound Samples
- No independent measurement review is linked for this model; it is ranked from hands-on listening and comparison against similarly priced speakers.
- Head-to-Head Comparisons
PSB Imagine B50: $999 per pair PSB Speakers eBay
Same family: the PSB Imagine T54 (smaller floorstanding, estimated 4.2/5) and the PSB Imagine T65 (larger floorstanding, rated 4.3/5).
Pros: The standmount sibling to the PSB Imagine T65 tower, from PSB’s current 2023-refreshed Imagine line, using the same titanium-dome tweeter and woven-carbon-fiber woofer platform. Measured bass extension of 69.6Hz (-3dB).
Cons: On-axis smoothness of just 0.235 and a deviation of 0.368dB are unremarkable for the price, with a +0.22dB per octave upward tilt giving it a brighter-leaning balance, a predicted in-room smoothness of just 0.35, and a Harman in-room bass extension estimate of only 49Hz. Current retail pricing ($999/pair) has risen well above the ~$700 figure recorded in the spinorama snapshot.
Full PSB Imagine B50 review and specifications →
| Released | Oct 2024 (2 years ago) |
|---|---|
| Bass Extension (-10dB) | 44.4Hz (derived, log-interpolated between spinorama.org -9dB/-12dB points) |
| Bass Extension (-3dB) | 69.6Hz (measured, Erin’s Audio Corner via spinorama.org) |
| Country | Canada (design) |
| DIY Kit | No |
| Dimensions | 6.75W x 11.8H x 9.875D in |
| Drivers | 1” titanium dome tweeter (ferrofluid neodymium magnet), 5.25” woven carbon-fiber woofer |
| Enclosure | 2-way, bass-reflex with rear slot port |
| Impedance | 8 ohms nominal, 4 ohms minimum |
| Sensitivity | 85dB anechoic / 87dB in-room |
| Spinorama Preference Score | 4.63 |
| Spinorama Preference Score with Perfect Sub | 6.92 |
| Weight | approx. 11.2 lbs (5.1 kg) each |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons