Short answer: the AsciLab F6Bs if sound quality matters most, the Triangle Borea BR03 if price matters most. The AsciLab F6Bs ranks #20 of 130 bookshelf speakers at $799. The Triangle Borea BR03 ranks #109 at $399, $400 cheaper.
What the Triangle Borea BR03 offers: Bass output is genuinely decent for the price - measured extension reaches F3 57Hz/F10 42Hz, which the reviewer had no real complaints about. Dual front-firing ports and a well-stuffed, well-braced cabinet. Solid build quality overall. Watch for: A noticeable mid-range suckout, most pronounced in the upper mid-range/lower treble, that the reviewer attributes to cabinet resonances and driver breakup rather than a deliberate voicing choice - it makes vocals and instruments sound recessed and thin rather than warm. Sibilance in the 4-8kHz region shows up on every track the reviewer tried. Measured minimum impedance dips to about 4.2 ohms (with an even lower EPDR), despite the speaker and its own rear panel being labeled 8 ohms - worth knowing if you’re planning to drive these with a receiver/AVR that assumes an 8-ohm nominal load. The reviewer is upfront that this speaker has a devoted following among other reviewers, but says he specifically doesn’t hear what they hear and wants people who own it to trust their own ears rather than assume something’s wrong with their hearing if they don’t love it either.
What the AsciLab F6Bs offers: A slimmer, sealed, VESA 100 wall mountable variant of AsciLab’s F6B, trading the F6B’s passive radiator for a shallower 15.4cm deep cabinet that can go straight on a wall bracket. The sound power directivity index has the tightest standard deviation, 3.32, of anything in this batch of new additions, meaning off axis energy tracks the on axis response unusually consistently for a sealed 2-way this size, and on axis deviation measures a clean 0.25dB average. Watch for: AsciLab’s own site shows the F6Bs sold out, though it remains in stock through resellers like Audiophonics and Tested Audio. Bass extension is measured at 82.0Hz at -3dB, noticeably less than the passive radiator equipped F6B, and listening window smoothness measures only a moderate 0.39. The 4 ohm nominal impedance calls for a reasonably capable amplifier.
Buy the Triangle Borea BR03 if the price matters more than sound quality. Buy the AsciLab F6Bs if sound quality matters more than the price.
The Triangle Borea BR03 is not a sound-quality pick. It sits near the bottom of the 130 bookshelf speakers; there are better options higher up.
Looking for alternatives? See the complete Passive Home rankings.
Specifications Side By Side
| Triangle Borea BR03 | AsciLab F6Bs | |
|---|---|---|
| Price | $399.00 per pair | €799 per pair |
| Ranked | #109 of 130 in Large Size Bookshelf Speakers | #20 of 130 in Large Size Bookshelf Speakers |
| Drivers | 6.5" natural cellulose midwoofer, 1" (25mm) EFS silk dome tweeter | 1" aluminum dome tweeter with waveguide and phase plug, 6" fiber cone woofer |
| Crossover Frequency | 3600Hz | 1kHz |
| Dimensions | 14.96"H x 8.11"W x 12.36"D | 14.5"H x 8"W x 6.1"D (368 x 203 x 154 mm) |
| Weight | 13.2 lbs (6 kg) each | 12.3 lbs (5.6 kg) each |
| Impedance | 8 ohms nominal (manufacturer spec), 4.2 ohms minimum (measured, Erin's Audio Corner) | 4 ohms nominal, 3.7 ohms minimum |
| Sensitivity | 87.5dB (measured at 2.83V/1m, Erin's Audio Corner) | 85.2dB @ 2.83V/1m (measured, Audio Science Review) |
| Bass Extension (-3dB) | 57Hz (measured, Erin's Audio Corner) | 82.0Hz (measured, Audio Science Review) |
| Bass Extension (-10dB) | 42Hz (measured, Erin's Audio Corner) | 50.1Hz (measured, Audio Science Review) |
| Recommended Power | 100W | - |
| Woofer Cabinet | ported, dual front ports | - |
| Spinorama Preference Score | 3.12 | 4.35 |
| Spinorama Preference Score with Perfect Sub | 5.47 | 7.01 |
| Enclosure | - | sealed |
| Mounting | - | VESA 100 wall mount compatible |
| Warranty | - | 2 years |
| Country | - | South Korea |
| Maximum SPL | - | 100dB full bandwidth, 102dB above 100Hz (manufacturer specified) |
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Prices on this page were last checked September 16, 2026 at 12:41 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
Triangle Borea BR03: $399.00 per pair Amazon eBay
Pros: Bass output is genuinely decent for the price - measured extension reaches F3 57Hz/F10 42Hz, which the reviewer had no real complaints about. Dual front-firing ports and a well-stuffed, well-braced cabinet. Solid build quality overall. Measured bass extension of 57Hz (-3dB), with a measured sensitivity of 87.5dB.
Cons: A noticeable mid-range suckout, most pronounced in the upper mid-range/lower treble, that the reviewer attributes to cabinet resonances and driver breakup rather than a deliberate voicing choice - it makes vocals and instruments sound recessed and thin rather than warm. Sibilance in the 4-8kHz region shows up on every track the reviewer tried. Measured minimum impedance dips to about 4.2 ohms (with an even lower EPDR), despite the speaker and its own rear panel being labeled 8 ohms - worth knowing if you’re planning to drive these with a receiver/AVR that assumes an 8-ohm nominal load. The reviewer is upfront that this speaker has a devoted following among other reviewers, but says he specifically doesn’t hear what they hear and wants people who own it to trust their own ears rather than assume something’s wrong with their hearing if they don’t love it either.
Full Triangle Borea BR03 review and specifications →
| Bass Extension (-10dB) | 42Hz (measured, Erin's Audio Corner) |
|---|---|
| Bass Extension (-3dB) | 57Hz (measured, Erin's Audio Corner) |
| Crossover Frequency | 3600Hz |
| Dimensions | 14.96"H x 8.11"W x 12.36"D |
| Drivers | 6.5" natural cellulose midwoofer, 1" (25mm) EFS silk dome tweeter |
| Impedance | 8 ohms nominal (manufacturer spec), 4.2 ohms minimum (measured, Erin's Audio Corner) |
| Recommended Power | 100W |
| Sensitivity | 87.5dB (measured at 2.83V/1m, Erin's Audio Corner) |
| Spinorama Preference Score | 3.12 |
| Spinorama Preference Score with Perfect Sub | 5.47 |
| Weight | 13.2 lbs (6 kg) each |
| Woofer Cabinet | ported, dual front ports |
- Links
- Reviews, Comparisons and Sound Samples
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AsciLab F6Bs: €799 per pair Audiophonics eBay
Pros: A slimmer, sealed, VESA 100 wall mountable variant of AsciLab’s F6B, trading the F6B’s passive radiator for a shallower 15.4cm deep cabinet that can go straight on a wall bracket. The sound power directivity index has the tightest standard deviation, 3.32, of anything in this batch of new additions, meaning off axis energy tracks the on axis response unusually consistently for a sealed 2-way this size, and on axis deviation measures a clean 0.25dB average. Measured bass extension of 82.0Hz (-3dB), with a measured sensitivity of 85.2dB.
Cons: AsciLab’s own site shows the F6Bs sold out, though it remains in stock through resellers like Audiophonics and Tested Audio. Bass extension is measured at 82.0Hz at -3dB, noticeably less than the passive radiator equipped F6B, and listening window smoothness measures only a moderate 0.39. The 4 ohm nominal impedance calls for a reasonably capable amplifier.
Full AsciLab F6Bs review and specifications →
| Bass Extension (-10dB) | 50.1Hz (measured, Audio Science Review) |
|---|---|
| Bass Extension (-3dB) | 82.0Hz (measured, Audio Science Review) |
| Country | South Korea |
| Crossover Frequency | 1kHz |
| Dimensions | 14.5"H x 8"W x 6.1"D (368 x 203 x 154 mm) |
| Drivers | 1" aluminum dome tweeter with waveguide and phase plug, 6" fiber cone woofer |
| Enclosure | sealed |
| Impedance | 4 ohms nominal, 3.7 ohms minimum |
| Maximum SPL | 100dB full bandwidth, 102dB above 100Hz (manufacturer specified) |
| Mounting | VESA 100 wall mount compatible |
| Sensitivity | 85.2dB @ 2.83V/1m (measured, Audio Science Review) |
| Spinorama Preference Score | 4.35 |
| Spinorama Preference Score with Perfect Sub | 7.01 |
| Warranty | 2 years |
| Weight | 12.3 lbs (5.6 kg) each |
- Links
- Reviews, Comparisons and Sound Samples
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