Short answer: the KEF R3. It ranks #15 of 222 bookshelf speakers by sound quality, rated 4.5/5, at $1,544.56; the PS Audio Aspen FR5 ranks #121, rated 3.7/5, and costs $3,499, so there is not much of a tradeoff to weigh.
The KEF R3 is the more accurate choice. A three way bookshelf speaker with KEF’s coaxial driver for stable imaging across seats and very low distortion, easy to run with a modest amp. Its measured preference score, a predictor of how neutral it sounds, is 6.20 against 4.64 for the PS Audio Aspen FR5. The catch: The low-frequency alignment rolls gradually rather than delivering high-output sub-bass; KEF specifies 58Hz +/-3dB and Erin’s high-level data supports using an 80Hz subwoofer crossover.
Why pick the PS Audio Aspen FR5: Compact speakers with a planar tweeter and passive radiator that reach unusually deep bass for their size. The tradeoff: Very low measured sensitivity near 81.6dB means it needs capable amplification despite its benign 5.6-ohm minimum.
Buy the KEF R3. It is rated higher for sound quality than the PS Audio Aspen FR5 and costs less, which makes it the one to get unless you need something the other one does better.
Looking for alternatives? See the complete Passive Home rankings.
Measured Differences
- Efficiency: the KEF R3 is rated at 86 dB sensitivity against 83.5 dB for the PS Audio Aspen FR5, so it plays as loud with roughly two thirds of the amplifier power.
- Close enough not to matter: bass extension (35.2 Hz vs 32.4 Hz, 10 dB down).
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Specifications Side By Side
| KEF R3 | PS Audio Aspen FR5 | |
|---|---|---|
| Price | $1,544.56 per pair | $3,499 per pair |
| Ranked | #15 of 222 in Large Size Bookshelf Speakers | #121 of 222 in Large Size Bookshelf Speakers |
| Bass Extension (-3dB) | Approximately 58Hz (manufacturer specified; consistent with Erin’s measured roll-off) | 56.4Hz (measured, Erin’s Audio Corner via spinorama.org) |
| Bass Extension (-10dB) | 35.2Hz (measured, Audio Science Review) | about 32.4Hz (measured, Spinorama data) |
| Sensitivity | Approximately 86-87dB/2.83V/1m (measured, Erin’s Audio Corner) | 83.5dB specified; 81.6dB measured |
| Impedance | 8 ohms nominal; suitable for Erin’s 4/8-ohm-rated amplifier | 6 ohms nominal, 5.6 ohms minimum |
| Drivers | 1” tweeter coaxial with 5” midrange; 6.5” woofer | 2.5” planar tweeter, 6.5” woofer |
| Dimensions | 16.6”H x 7.9”W x 13.2”D | 14.5H x 8W x 13D in |
| Woofer Cabinet | ported, rear Flexible Port | - |
| Weight | 29.9 lbs (13.55 kg) each | 26.7 lbs (12.1 kg) each |
| Spinorama Preference Score | 6.2 (spinorama.org) | 4.64 |
| Spinorama Preference Score with Perfect Sub | 7.97 (spinorama.org) | 6.26 |
| DIY Kit | No | No |
| Enclosure | - | 2-way passive with rear passive radiator |
Where the Ratings Come From
- KEF R3: Spinorama.org measurements and reviews by Erin’s Audio Corner and Audio Science Review.
- PS Audio Aspen FR5: Spinorama.org measurements and reviews by Erin’s Audio Corner.
This comparison is generated from the ratings, specifications and measurements on each product’s own page, and it updates when that data changes. How we rank explains how each rating is decided.
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