Short answer: the Audio First Fidelia. It ranks #1 of 88 bookshelf speakers by sound quality (rated 4.8/5); the Ascend Sierra 1 v2 ranks #3 (rated 4.7/5).
The case for the Ascend Sierra 1 v2: Formaldehyde-free layered bamboo ply cabinet with a 1” dome tweeter over a 5.25” midwoofer, mated by a 4th-order acoustic crossover rather than a stock textbook design. The catch: F3 of 55Hz and F10 of 39Hz mean in-room extension tops out in the mid-40s Hz; the reviewer still recommends a subwoofer for full-range material.
Why pick the Audio First Fidelia: Kit speaker offering exceptional value and tonal accuracy; chosen by reviewer as reference standard for future speaker tonality comparisons despite 1,250 USD price point. The catch: Kit assembly required; lower sensitivity (~83-85 dB vs. typical 85 dB average) demands adequate amplifier power.
Buy the Audio First Fidelia. It is rated higher for sound quality than the Ascend Sierra 1 v2.
Want more options? Browse the full Passive Home rankings.
Specifications Side By Side
| Ascend Sierra 1 v2 | Audio First Fidelia | |
|---|---|---|
| Price | $1000 per pair | £950 per pair for the flatpack kit (assembly required) |
| Ranked | #3 of 88 in Medium Size Bookshelf Speakers | #1 of 88 in Medium Size Bookshelf Speakers |
| Bass Extension (-10dB) | 39Hz (measured, Erin’s Audio Corner) | 38Hz (measured, Erin’s Audio Corner) |
| Bass Extension (-3dB) | 55Hz (measured, Erin’s Audio Corner) | 53Hz (measured, Erin’s Audio Corner) |
| Dimensions | 14.2”H x 7.5”W x 10.5”D (361.9 x 190.5 x 266.7 mm) | 11.8”H x 7.1”W x 11.7”D (300 x 180 x 297.6 mm) |
| Impedance | 8 ohms nominal, 7 ohms minimum (measured, Erin’s Audio Corner) | 4 ohms |
| Sensitivity | 81.5dB (measured, Erin’s Audio Corner) | 84dB |
| Drivers | 5.25” proprietary mineral-filled polypropylene cone with cast aluminum frame woofer, 26mm aluminum/magnesium alloy dome tweeter with titanium former (SEAS Titan) | 5” ceramic-aluminum cone woofer, 1” ceramic-aluminum tweeter |
| Weight | 18.5 lbs (8.4 kg) each | 15 lbs (6.8 kg) each |
| Woofer Cabinet | ported | ported, rear |
| Spinorama Preference Score | 6.65 | 6.45 |
| Spinorama Preference Score with Perfect Sub | 8.61 | 8.46 |
| DIY Kit | No | Yes |
| Crossover Frequency | - | 1560Hz |
Related Speaker Comparisons
More worthwhile head-to-heads for Audio First Fidelia:
- Philharmonic Ceramic Mini vs Audio First Fidelia
- KEF LS50 Meta vs Audio First Fidelia
- XMechanik Mechano23 DIY vs Audio First Fidelia
- Ascend Acoustics HTM-200SE2 vs Audio First Fidelia
- Audio First Fidelia vs Arendal 1961 Monitor
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The Two Speakers In Full
Ascend Sierra 1 v2: $1000 per pair Ascend Acoustics eBay
Pros: Formaldehyde-free layered bamboo ply cabinet with a 1” dome tweeter over a 5.25” midwoofer, mated by a 4th-order acoustic crossover rather than a stock textbook design. In-room response is extremely linear (the reviewer called it “textbook”) a clear step up from the earlier V1, which had boxiness around 700Hz-1kHz and sibilance around 4-6kHz. Preference score of 8.4 with a subwoofer (6.8 without), which the reviewer calls topnotch. Wide, even horizontal radiation of about ±70° up to 6kHz. Better vertical directivity than its tweeter-to-woofer spacing would suggest, thanks to the steep 4th-order crossover slopes. No mechanical noise, port chuffing, or woofer bottoming even driven to 96dB/1m. In a three-way comparison against the Dynaudio Emit 20 and a Revel bookshelf model (all around $1,000/pair), measured as the most linear of the three and was the reviewer’s personal pick over both, despite the Dynaudio’s deeper bass and higher output capability. Independent ASR Klippel measurements corroborate Erin’s findings: superb off-axis response with only slight on-axis variations, and an in-room response the reviewer called “incredibly smooth and accurate. Amazing for a non-DSP speaker.” Distortion above 200Hz at 86dB/1m is very low for the class. Measured bass extension of 55Hz (-3dB), with a measured sensitivity of 81.5dB.
Cons: F3 of 55Hz and F10 of 39Hz mean in-room extension tops out in the mid-40s Hz; the reviewer still recommends a subwoofer for full-range material. Diffraction dips appear around 3kHz and 5-6kHz, and the 1” dome tweeter starts beaming above roughly 6.7kHz, narrowing the soundstage radiation in the top octave: a straightforward consequence of dome size rather than a design flaw. At 96dB/1m the 5.25” midwoofer shows increased distortion in the midrange, likely tied to motor topology; high-passing to a subwoofer around 80Hz largely clears it up. Moderate sensitivity (~81-82dB average) with a 7-ohm minimum impedance. ASR’s power-sweep testing found response holds steady up to 96dB SPL/1m, but pushing to 102dB causes midbass below 400Hz to sag with distortion “through the roof”: a harder output ceiling than the 96dB tests alone suggest. Vertical directivity also narrows above about 1kHz, so the reviewer recommends staying at tweeter-axis height for best results.
Full Ascend Sierra 1 v2 review and specifications →
| Bass Extension (-10dB) | 39Hz (measured, Erin’s Audio Corner) |
|---|---|
| Bass Extension (-3dB) | 55Hz (measured, Erin’s Audio Corner) |
| DIY Kit | No |
| Dimensions | 14.2”H x 7.5”W x 10.5”D (361.9 x 190.5 x 266.7 mm) |
| Drivers | 5.25” proprietary mineral-filled polypropylene cone with cast aluminum frame woofer, 26mm aluminum/magnesium alloy dome tweeter with titanium former (SEAS Titan) |
| Impedance | 8 ohms nominal, 7 ohms minimum (measured, Erin’s Audio Corner) |
| Sensitivity | 81.5dB (measured, Erin’s Audio Corner) |
| Spinorama Preference Score | 6.65 |
| Spinorama Preference Score with Perfect Sub | 8.61 |
| Weight | 18.5 lbs (8.4 kg) each |
| Woofer Cabinet | ported |
- Links
- Reviews, Comparisons and Sound Samples
- Erin’s Audio Corner: NEW! Ascend Acoustics Sierra-1 V2 Review More from Erin’s Audio Corner →
- Erin’s Audio Corner Website Ascend Sierra 1 v2
- Audio Science Review Ascend Sierra 1 v2 More from Audio Science Review →
- Erin’s Audio Corner: 5 AWESOME SPEAKERS Under $1000 You Won’t Regret
- Erin’s Audio Corner: I Tested 250 Speakers So You Don’t Have To!
- Erin’s Audio Corner: My Top Picks of 2023: Must-Haves Under $3000
- Manufacturer Measurements (spinorama.org)
- Head-to-Head Comparisons
- Ascend Sierra 1 v2 vs KEF LS50 Meta
- Ascend Sierra 1 v2 vs Philharmonic Ceramic Mini
- Ascend Sierra 1 v2 vs XMechanik Mechano23 DIY
- Ascend Sierra 1 v2 vs Ascend Acoustics HTM-200SE2
- Ascend Sierra 1 v2 vs Arendal 1961 Monitor
- Ascend Sierra 1 v2 vs Ascend Acoustics Luna V2 Mini-Monitor Titan
- Ascend Sierra 1 v2 vs Aalto Speakers Aalto 1 EVO
- Ascend Sierra 1 v2 vs Moondrop M4P MTM
- See all 49 comparisons
Audio First Fidelia: £950 per pair for the flatpack kit (assembly required) Audio First Designs eBay
Pros: Kit speaker offering exceptional value and tonal accuracy; chosen by reviewer as reference standard for future speaker tonality comparisons despite 1,250 USD price point. Achieves bass extension to 53 Hz (F3) and 38 Hz (F10) from compact cabinet. Direct-from-manufacturer availability eliminates retailer markup. Measured bass extension of 53Hz (-3dB).
Cons: Kit assembly required; lower sensitivity (~83-85 dB vs. typical 85 dB average) demands adequate amplifier power. Only available direct from UK manufacturer with associated shipping costs and lead times. Trade-off between compact driver configuration and maximum dynamic output.
Full Audio First Fidelia review and specifications →
| Bass Extension (-10dB) | 38Hz (measured, Erin’s Audio Corner) |
|---|---|
| Bass Extension (-3dB) | 53Hz (measured, Erin’s Audio Corner) |
| Crossover Frequency | 1560Hz |
| DIY Kit | Yes |
| Dimensions | 11.8”H x 7.1”W x 11.7”D (300 x 180 x 297.6 mm) |
| Drivers | 5” ceramic-aluminum cone woofer, 1” ceramic-aluminum tweeter |
| Impedance | 4 ohms |
| Sensitivity | 84dB |
| Spinorama Preference Score | 6.45 |
| Spinorama Preference Score with Perfect Sub | 8.46 |
| Weight | 15 lbs (6.8 kg) each |
| Woofer Cabinet | ported, rear |
- Links
- Reviews, Comparisons and Sound Samples
- Erin’s Audio Corner: The #1 Reason audiophiles Are Raving About Fidelia’s Sound Quality More from Erin’s Audio Corner →
- Erin’s Audio Corner: I Tested 250 Speakers So You Don’t Have To!
- Erin’s Audio Corner: My Absolute Favorite Products of 2024 Revealed
- Erin’s Audio Corner Measurements (spinorama.org)
- Head-to-Head Comparisons
- Audio First Fidelia vs Philharmonic Ceramic Mini
- Audio First Fidelia vs KEF LS50 Meta
- Audio First Fidelia vs XMechanik Mechano23 DIY
- Audio First Fidelia vs Ascend Acoustics HTM-200SE2
- Audio First Fidelia vs Arendal 1961 Monitor
- Audio First Fidelia vs Ascend Acoustics Luna V2 Mini-Monitor Titan
- Audio First Fidelia vs Aalto Speakers Aalto 1 EVO
- Audio First Fidelia vs Monitor Audio Silver 50 7G
- See all 25 comparisons