Short answer: the Focal Aria 906 for its flatter measured response, the Klipsch RP-600M for off-axis consistency. The RP-600M has more linear horizontal dispersion than the updated RP-600M II, so its tonal character changes less as you move side-to-side, but a strong resonance around 300Hz stands out in the lower vocal range. The Aria 906 shows very flat bass and an almost perfect predicted in-room response prior to 1kHz, with a 3dB dip around 2.8kHz.
Buy the Focal Aria 906 only if you find one used in good condition; both are discontinued, and it is the better rated of the two. For a new speaker, start with the AsciLab C6B instead.
Looking for alternatives? See the complete Passive Home rankings.
Specifications Side By Side
| Focal Aria 906 | Klipsch RP-600M | |
|---|---|---|
| Price | $2,199.00 per pair used, Discontinued | $377.99 per pair Discontinued |
| Ranked | #97 of 134 in Large Size Bookshelf Speakers | #111 of 134 in Large Size Bookshelf Speakers |
| Bass Extension (-10dB) | 47Hz (measured, Erin’s Audio Corner) | 40Hz (measured, Erin’s Audio Corner) |
| Bass Extension (-3dB) | 63Hz (measured, Erin’s Audio Corner) | 73Hz (measured, Erin’s Audio Corner) |
| Impedance | 4 ohms nominal (4.8 ohms minimum above 80Hz, measured by Erin’s Audio Corner) | 8 ohms nominal, 3.5 ohms minimum (measured, Erin’s Audio Corner) |
| Sensitivity | 86.5dB (measured average, Erin’s Audio Corner) | 85.2dB (measured, Erin’s Audio Corner) |
| Drivers | 26mm tweeter + 165mm mid-woofer | 6.5” Cerametallic cone woofer, 1” titanium LTS vented tweeter with Tractrix horn |
| Weight | 39.9 lbs (18.1 kg) | 16.1 lbs (7.3 kg) each |
| Dimensions | 15.4”H x 8.9”W x 11”D (390.0 x 225.0 x 280.0 mm) | 15.7”H x 8”W x 11.9”D (398.8 x 203.2 x 302.3 mm) |
| Woofer Cabinet | ported, front | ported |
| Spinorama Preference Score | 4.64 | 3.66 |
| Spinorama Preference Score with Perfect Sub | 7.00 | 5.61 |
| DIY Kit | No | No |
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Prices on this page were last checked October 3, 2026 at 10:26 PM 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
Focal Aria 906: $2,199.00 per pair used Discontinued Amazon eBay
Newer model: the Focal Aria Evo X N°1. It’s likely to perform similarly, though we don’t have measurements to confirm that yet.
Pros: CEA2034 spinorama shows very flat bass response, with the reviewer rating overall performance “good.” Predicted in-room response is almost perfect prior to 1kHz. Horizontal dispersion of about ±60 degrees is good and stays even out to about -12dB before getting erratic. Woofer distortion is quite low at 86dB SPL/1m. Measured bass extension of 63Hz (-3dB), with a measured sensitivity of 86.5dB.
Cons: 3dB dip around 2.8kHz. Some resonance around 800Hz, small directivity error around 7kHz. A dip in the upper midrange also shows up in the predicted in-room response. Distortion becomes problematic at 96dB SPL/1m, with a notable peak around 1.3-1.5kHz alongside broader midrange elevation. Discontinued.
Full Focal Aria 906 review and specifications →
| Bass Extension (-10dB) | 47Hz (measured, Erin’s Audio Corner) |
|---|---|
| Bass Extension (-3dB) | 63Hz (measured, Erin’s Audio Corner) |
| DIY Kit | No |
| Dimensions | 15.4”H x 8.9”W x 11”D (390.0 x 225.0 x 280.0 mm) |
| Drivers | 26mm tweeter + 165mm mid-woofer |
| Impedance | 4 ohms nominal (4.8 ohms minimum above 80Hz, measured by Erin’s Audio Corner) |
| Sensitivity | 86.5dB (measured average, Erin’s Audio Corner) |
| Spinorama Preference Score | 4.64 |
| Spinorama Preference Score with Perfect Sub | 7.00 |
| Weight | 39.9 lbs (18.1 kg) |
| Woofer Cabinet | ported, front |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
Klipsch RP-600M: $377.99 per pair Discontinued Amazon eBay
Newer model: the Klipsch RP-600M II, ranked higher, rated 3.7/5.
Pros: More linear horizontal dispersion than the updated RP-600M II: as you move side-to-side, the tonal character changes less, a genuine advantage for off-axis listening consistency. Takes exceptionally well to EQ correction (miniDSP or similar), letting a knowledgeable owner fix its tonal shortcomings without needing to upgrade. Standard 6.5” woofer/horn-tweeter two-way design with reasonably gradual bass rolloff (F3 ~70Hz, F10 ~40Hz) rather than a steep vented-enclosure cutoff. Measured bass extension of 73Hz (-3dB), with a measured sensitivity of 85.2dB.
Cons: A strong, annoying resonance in the lower vocal range around 300Hz stands out clearly (though it can be EQ’d out). Overall tonal balance is notably less neutral than the newer RP-600M II, with a roughly 3-4dB suckout in the estimated in-room response. The waveguide doesn’t extend flush to the baffle edge, increasing diffraction compared to the redesigned version. Klipsch’s marketed sensitivity spec (about 96dB) is a half-space, in-room-style rating roughly 9dB above the true anechoic figure (closer to 85-86dB), which can mislead buyers comparing spec sheets. Elevated treble on-axis, similar to its successor, benefits from toe-out or careful placement. Vertical listening tolerance is limited to about ±10° from the tweeter axis. Still needs a subwoofer for real bass weight; a boost around 120Hz gives kick drums their “tambour” without the underlying “meat.”. Discontinued.
Full Klipsch RP-600M review and specifications →
| Bass Extension (-10dB) | 40Hz (measured, Erin’s Audio Corner) |
|---|---|
| Bass Extension (-3dB) | 73Hz (measured, Erin’s Audio Corner) |
| DIY Kit | No |
| Dimensions | 15.7”H x 8”W x 11.9”D (398.8 x 203.2 x 302.3 mm) |
| Drivers | 6.5” Cerametallic cone woofer, 1” titanium LTS vented tweeter with Tractrix horn |
| Impedance | 8 ohms nominal, 3.5 ohms minimum (measured, Erin’s Audio Corner) |
| Sensitivity | 85.2dB (measured, Erin’s Audio Corner) |
| Spinorama Preference Score | 3.66 |
| Spinorama Preference Score with Perfect Sub | 5.61 |
| Weight | 16.1 lbs (7.3 kg) each |
| Woofer Cabinet | ported |
- Links
- Reviews, Comparisons and Sound Samples
- Erin’s Audio Corner: The Truth about Klipsch’s “NEW” Sound. RP-600M Update. More from Erin’s Audio Corner →
- Erin’s Audio Corner Website Klipsch RP-600M
- GR-Research: We Bought The "NEW" RP-600M II Is KLIPSCH Listening?! More from GR-Research →
- Audio Science Review Measurements More from Audio Science Review →
- Audio Science Review Measurements (spinorama.org)
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