Short answer: the Triangle Esprit Titus EZ, if you are buying new. The KEF Q150 ranks higher than it (#49 vs #62 of 160 bookshelf speakers, 3.7/5 vs 3.6/5) but is discontinued, so only consider it used; the Triangle Esprit Titus EZ is still sold new at $1,099. The KEF Q150’s replacement, the KEF Q1 Meta, is rated 3.6/5.
The KEF Q150 is the more accurate, deeper-bass option. 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 4.24 for the Triangle Esprit Titus EZ. Its bass reaches about 51Hz before falling 3dB, against 73.4Hz for the Triangle Esprit Titus EZ. The tradeoff: 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 Triangle Esprit Titus EZ: High 90dB specified sensitivity, a lively horn-loaded titanium tweeter and compact real hi-fi cabinetry. The tradeoff: The 62Hz measured extension still calls for a subwoofer, while the 3.8-ohm minimum impedance demands a competent amplifier.
Buy the Triangle Esprit Titus EZ if you want one new; the KEF Q150 is discontinued, so only look for it used.
Want more options? Browse the full Passive Home rankings.
Specifications Side By Side
| KEF Q150 | Triangle Esprit Titus EZ | |
|---|---|---|
| Price | $350 per pair Discontinued | $1,099 per pair |
| Ranked | #49 of 160 in Medium Size Bookshelf Speakers | #62 of 160 in Medium Size Bookshelf Speakers |
| Bass Extension (-10dB) | 44Hz (measured, Erin’s Audio Corner) | 56.0Hz (derived, log-interpolated between spinorama.org -9dB/-12dB points) |
| Bass Extension (-3dB) | 51Hz (measured, Erin’s Audio Corner) | 73.4Hz (measured, spinorama.org) |
| Dimensions | 11.9”H x 7.1”W x 10.9”D (303 x 180 x 278 mm) | 12H x 6.6W x 10.5D in |
| Impedance | 8 ohms nominal, about 4.7 ohms minimum (measured, Erin’s Audio Corner) | 8 ohms nominal, 3.8 ohms minimum |
| Sensitivity | ~85dB (300Hz-3kHz on-axis, measured, Erin’s Audio Corner) | 90dB |
| Drivers | 130mm (5.25”) aluminium Uni-Q woofer, 25mm (1”) vented aluminium dome tweeter | 1-inch titanium horn tweeter, 5-inch paper midwoofer |
| Weight | 12.3 lbs (5.6 kg) each | 13 lbs (5.9 kg) each |
| Woofer Cabinet | ported, rear | - |
| Spinorama Preference Score | 4.86 | 4.24 |
| Spinorama Preference Score with Perfect Sub | 7.06 | 6.98 |
| DIY Kit | No | No |
| Enclosure | - | 2-way rear-ported |
| Frequency Response | - | 55Hz-22kHz |
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- KEF LS50 Meta vs KEF Q150
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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
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
Triangle Esprit Titus EZ: $1,099 per pair Triangle Hi-Fi eBay
Same family: the Triangle Esprit Antal Ez (floorstanding, rated 2.5/5).
Pros: High 90dB specified sensitivity, a lively horn-loaded titanium tweeter and compact real hi-fi cabinetry. Its local Spinorama scores are 4.24 raw and 6.98 with a subwoofer, supporting a capable small-room system. Measured bass extension of 73.4Hz (-3dB).
Cons: The 62Hz measured extension still calls for a subwoofer, while the 3.8-ohm minimum impedance demands a competent amplifier. Horn/directivity behavior makes setup and toe-in more consequential.
Full Triangle Esprit Titus EZ review and specifications →
| Bass Extension (-10dB) | 56.0Hz (derived, log-interpolated between spinorama.org -9dB/-12dB points) |
|---|---|
| Bass Extension (-3dB) | 73.4Hz (measured, spinorama.org) |
| DIY Kit | No |
| Dimensions | 12H x 6.6W x 10.5D in |
| Drivers | 1-inch titanium horn tweeter, 5-inch paper midwoofer |
| Enclosure | 2-way rear-ported |
| Frequency Response | 55Hz-22kHz |
| Impedance | 8 ohms nominal, 3.8 ohms minimum |
| Sensitivity | 90dB |
| Spinorama Preference Score | 4.24 |
| Spinorama Preference Score with Perfect Sub | 6.98 |
| Weight | 13 lbs (5.9 kg) each |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons