Short answer: the KEF Q1 Meta, if you are buying new. The KEF Q150 ranks higher than the JBL Stage 250B (#49 vs #91 of 160 bookshelf speakers) but is discontinued; its replacement, the KEF Q1 Meta, is rated 3.6/5 at $399.99 and is still sold new.
The KEF Q150 is the more accurate, deeper-bass choice. Two-way coaxial (Uni-Q) design with a 1” dome tweeter and 5.25” mid-range time-aligned in a single driver assembly, available in ported or sealed configuration. Its measured preference score, a predictor of how neutral it sounds, is 4.86 against 4.06 for the JBL Stage 250B. Its bass reaches about 51Hz before falling 3dB, against 64.5Hz for the JBL Stage 250B. The catch: A high-frequency lift in the estimated in-room response makes it sound noticeably brighter in an untreated room than in a heavily acoustically-treated one: a real preference factor depending on your room’s furnishings.
Why pick the JBL Stage 250B: Good local Spinorama scores of 4.06 raw and 6.60 with a subwoofer, with smooth horizontal directivity from JBL’s next-generation HDI waveguide. Watch for: Its objective score is good rather than class-leading, and the rear port needs some wall clearance.
Buy the KEF Q1 Meta, the replacement for the discontinued KEF Q150; it is rated higher for sound quality than the JBL Stage 250B.
Looking for alternatives? See the complete Passive Home rankings.
Specifications Side By Side
| KEF Q150 | JBL Stage 250B | |
|---|---|---|
| Price | $350 per pair Discontinued | $439.95 per pair |
| Ranked | #49 of 160 in Medium Size Bookshelf Speakers | #91 of 160 in Medium Size Bookshelf Speakers |
| Bass Extension (-10dB) | 44Hz (measured, Erin’s Audio Corner) | 50Hz (measured, Erin’s Audio Corner) |
| Bass Extension (-3dB) | 51Hz (measured, Erin’s Audio Corner) | 64.5Hz (measured, Erin’s Audio Corner via spinorama.org) |
| Dimensions | 11.9”H x 7.1”W x 10.9”D (303 x 180 x 278 mm) | 12.6H x 7.9W x 9.5D in |
| Impedance | 8 ohms nominal, about 4.7 ohms minimum (measured, Erin’s Audio Corner) | 6 ohms |
| Sensitivity | ~85dB (300Hz-3kHz on-axis, measured, Erin’s Audio Corner) | 86dB/2.83V/1m |
| Drivers | 130mm (5.25”) aluminium Uni-Q woofer, 25mm (1”) vented aluminium dome tweeter | 1-inch aluminum tweeter, 5.25-inch polycellulose woofer |
| Weight | 12.3 lbs (5.6 kg) each | 12.3 lbs (5.6 kg) each |
| Woofer Cabinet | ported, rear | ported, rear |
| Spinorama Preference Score | 4.86 | 4.06 |
| Spinorama Preference Score with Perfect Sub | 7.06 | 6.60 |
| DIY Kit | No | No |
| Enclosure | - | Passive 2-way rear-ported |
| Frequency Response | - | 50Hz-25kHz (-6dB) |
| Recommended Power | - | 20-150W |
| Power Handling | - | 75W RMS |
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The Two Speakers In Full
KEF Q150: $350 per pair Discontinued Amazon eBay
Newer model: the KEF Q1 Meta, ranked lower, rated 3.6/5.
Older model: the KEF Q100 (ranked lower, rated 2.4/5).
Same family: the KEF Q350 (larger bookshelf, rated 3/5), the KEF Q250c (smaller center, rated 3.9/5) and the KEF Q650c (larger center, rated 3.7/5).
Pros: Two-way coaxial (Uni-Q) design with a 1” dome tweeter and 5.25” mid-range time-aligned in a single driver assembly, available in ported or sealed configuration. Exceptional soundstage depth, a hallmark of KEF’s coaxial designs that the reviewer says few other speakers match. Bass extension reaches into kick-drum territory, respectable for a compact bookshelf speaker. Resonances present in measurements are consistent across on- and off-axis readings, meaning they can be effectively corrected with EQ. Distortion profile is essentially the same whether run sealed or ported, since a subwoofer crossover point sits above where the differences would matter anyway. At its sale price (around $300, sometimes seen at $400), the reviewer considers it a clear step up from his previous budget favorite in this range, the Emotiva B1+, mainly due to the superior soundstage depth. Measured bass extension of 51Hz (-3dB), with a measured sensitivity of 85dB.
Cons: A high-frequency lift in the estimated in-room response makes it sound noticeably brighter in an untreated room than in a heavily acoustically-treated one: a real preference factor depending on your room’s furnishings. A mild dip in the 1-2kHz region reduces vocal fullness somewhat. Unexplained resonances appear in measurements and persist in both sealed and ported configurations, pointing to enclosure or panel vibration rather than the port. Horizontal radiation is narrower than the reviewer generally prefers from KEF’s lineup, with directivity that widens somewhat around 1.2kHz (near a resonance) and again above about 5kHz. Compression testing at high output (102dB) shows significant nonlinearity, especially at lower frequencies: noticeably worse than a comparable Arendal bookshelf speaker costing over twice as much, which held up better until 80Hz. Not intended for loud listening without a subwoofer: the woofer will over-exert itself without a high-pass filter, and the reviewer recommends crossing over at 80-120Hz. At full retail price (around $600/pair), the value proposition is far less certain than at sale pricing. Discontinued.
Full KEF Q150 review and specifications →
| Bass Extension (-10dB) | 44Hz (measured, Erin’s Audio Corner) |
|---|---|
| Bass Extension (-3dB) | 51Hz (measured, Erin’s Audio Corner) |
| DIY Kit | No |
| Dimensions | 11.9”H x 7.1”W x 10.9”D (303 x 180 x 278 mm) |
| Drivers | 130mm (5.25”) aluminium Uni-Q woofer, 25mm (1”) vented aluminium dome tweeter |
| Impedance | 8 ohms nominal, about 4.7 ohms minimum (measured, Erin’s Audio Corner) |
| Sensitivity | ~85dB (300Hz-3kHz on-axis, measured, Erin’s Audio Corner) |
| Spinorama Preference Score | 4.86 |
| Spinorama Preference Score with Perfect Sub | 7.06 |
| Weight | 12.3 lbs (5.6 kg) each |
| Woofer Cabinet | ported, rear |
- Links
- Reviews, Comparisons and Sound Samples
- Erin’s Audio Corner: Kef’s Cheapest Bookshelf. Is the Q150 worth your money? More from Erin’s Audio Corner →
- Erin’s Audio Corner Website KEF Q150
- GR-Research: KEF Q150… can it get any BETTER? More from GR-Research →
- Erin’s Audio Corner: 5 AWESOME SPEAKERS Under $1000 You Won’t Regret
- Erin’s Audio Corner: Budget Stereo Systems You Will Love
- Erin’s Audio Corner Measurements (spinorama.org)
- Head-to-Head Comparisons
JBL Stage 250B: $439.95 per pair Amazon JBL eBay
Older models: the JBL Arena 120 (ranked higher, rated 3.8/5) and the JBL Stage A130 (ranked lower, rated 2.1/5).
Same family: the JBL Stage 2 240B (smaller bookshelf, ranked lower, estimated 2.7/5), the JBL Stage 2 260F (smaller floorstanding, estimated 4.2/5), the JBL Stage 2 280F (larger floorstanding, rated 3.4/5), the JBL Stage 2 245C (center, estimated 3.2/5), the JBL Stage 200P (smaller subwoofer, estimated 3.5/5) and the JBL Stage 220P (larger subwoofer, estimated 3.7/5).
Pros: Good local Spinorama scores of 4.06 raw and 6.60 with a subwoofer, with smooth horizontal directivity from JBL’s next-generation HDI waveguide. The current Stage 2 model offers solid build details, magnetic grilles and useful 56Hz measured extension at an accessible price. Measured bass extension of 64.5Hz (-3dB).
Cons: Its objective score is good rather than class-leading, and the rear port needs some wall clearance. At 86dB sensitivity and six-ohm nominal impedance it is not especially easy to drive, while the compact woofer limits deep-bass output.
Full JBL Stage 250B review and specifications →
| Bass Extension (-10dB) | 50Hz (measured, Erin’s Audio Corner) |
|---|---|
| Bass Extension (-3dB) | 64.5Hz (measured, Erin’s Audio Corner via spinorama.org) |
| DIY Kit | No |
| Dimensions | 12.6H x 7.9W x 9.5D in |
| Drivers | 1-inch aluminum tweeter, 5.25-inch polycellulose woofer |
| Enclosure | Passive 2-way rear-ported |
| Frequency Response | 50Hz-25kHz (-6dB) |
| Impedance | 6 ohms |
| Power Handling | 75W RMS |
| Recommended Power | 20-150W |
| Sensitivity | 86dB/2.83V/1m |
| Spinorama Preference Score | 4.06 |
| Spinorama Preference Score with Perfect Sub | 6.60 |
| Weight | 12.3 lbs (5.6 kg) each |
| Woofer Cabinet | ported, rear |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
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