Short answer: the Sonus Faber Lumina II. It ranks #94 of 134 bookshelf speakers by sound quality (rated 3.4/5) at $1,600 and is still sold new; the Klipsch RP-600M ranks #111 (rated 2.9/5) and is discontinued, so it is only an option used.
Buy the Sonus Faber Lumina II. It is rated higher for sound quality and still sold new, while the Klipsch RP-600M is discontinued.
Looking for alternatives? See the complete Passive Home rankings.
Specifications Side By Side
| Sonus Faber Lumina II | Klipsch RP-600M | |
|---|---|---|
| Price | $1,600 per pair | $377.99 per pair Discontinued |
| Ranked | #94 of 134 in Large Size Bookshelf Speakers | #111 of 134 in Large Size Bookshelf Speakers |
| Drivers | 29mm DAD dome tweeter, 150mm paper cone mid-woofer | 6.5” Cerametallic cone woofer, 1” titanium LTS vented tweeter with Tractrix horn |
| Crossover Frequency | 1800Hz | - |
| Dimensions | 12” x 7.1” x 10.4” (304 x 180 x 263 mm) | 15.7”H x 8”W x 11.9”D (398.8 x 203.2 x 302.3 mm) |
| Weight | 12.5 lbs (5.65 kg) each | 16.1 lbs (7.3 kg) each |
| Impedance | 4 ohms nominal, 4.1 ohms minimum (measured, Erin’s Audio Corner) | 8 ohms nominal, 3.5 ohms minimum (measured, Erin’s Audio Corner) |
| Sensitivity | 86dB (measured average, Erin’s Audio Corner; matches manufacturer spec) | 85.2dB (measured, Erin’s Audio Corner) |
| Bass Extension (-3dB) | 60Hz (measured, Erin’s Audio Corner) | 73Hz (measured, Erin’s Audio Corner) |
| Bass Extension (-10dB) | 41Hz (measured, Erin’s Audio Corner) | 40Hz (measured, Erin’s Audio Corner) |
| Frequency Response | 55Hz - 24kHz (manufacturer specified) | - |
| Recommended Power | 30W - 150W | - |
| Spinorama Preference Score | 3.81 | 3.66 |
| Spinorama Preference Score with Perfect Sub | 6.10 | 5.61 |
| DIY Kit | No | No |
| Woofer Cabinet | - | ported |
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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
Sonus Faber Lumina II: $1,600 per pair Crutchfield eBay
Pros: Handmade in Italy with a gloss-finished front baffle and black leather-wrapped cabinet: genuinely nice-looking speaker with real brand cachet. Bass extension is competitive for the size, reaching about 50 Hz in-room with mild compression and good distortion figures, so higher output levels and greater listening distances aren’t a problem down to that point. About 20 dB of dynamic range at typical listening levels (73 dB at 4m), which comfortably covers most music without the tonal balance shifting as instruments and vocals peak. Off-axis behavior is consistent: toeing the speakers 20-30 degrees out doesn’t meaningfully change the in-room high-frequency character, so placement flexibility is good once you’ve dialed in the tonal balance. Measured bass extension of 60Hz (-3dB), with a measured sensitivity of 86dB.
Cons: Not a neutral speaker: has a persistent high-frequency boost/lift that makes it sound forward and bright, present whether pointed directly at the listener or toed out. A slightly nasal quality traced to a resonance around 1 kHz that EQ can address. The reviewer needed to trim treble by about 4 dB on his preamp to get the tonal balance he wanted, meaning most listeners will want equalization available to fully enjoy this speaker. At roughly the same $1,000ish price point, alternatives like the Ascend Acoustics Sierra 1 V2 measure more linear (with a tradeoff in distortion and crossover-region directivity), and the Dynaudio Emit 20 offers deeper bass extension and lower compression at the cost of a more deliberately colored tonal signature.
Full Sonus Faber Lumina II review and specifications →
| Bass Extension (-10dB) | 41Hz (measured, Erin’s Audio Corner) |
|---|---|
| Bass Extension (-3dB) | 60Hz (measured, Erin’s Audio Corner) |
| Crossover Frequency | 1800Hz |
| DIY Kit | No |
| Dimensions | 12” x 7.1” x 10.4” (304 x 180 x 263 mm) |
| Drivers | 29mm DAD dome tweeter, 150mm paper cone mid-woofer |
| Frequency Response | 55Hz - 24kHz (manufacturer specified) |
| Impedance | 4 ohms nominal, 4.1 ohms minimum (measured, Erin’s Audio Corner) |
| Recommended Power | 30W - 150W |
| Sensitivity | 86dB (measured average, Erin’s Audio Corner; matches manufacturer spec) |
| Spinorama Preference Score | 3.81 |
| Spinorama Preference Score with Perfect Sub | 6.10 |
| Weight | 12.5 lbs (5.65 kg) each |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
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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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