Short answer: the Klipsch Reference R-50M, though neither ranks well in its class. It ranks #155 of 168 bookshelf speakers by sound quality, rated 1.7/5, at $299.99. The Klipsch R-51M ranks #160, rated 1.6/5, at $289.99, $10 cheaper, not enough of a saving to outweigh the sound-quality gap. Both are rated below 3.0/5 among the 168 bookshelf speakers, and the Ascend Acoustics HTM-200SE2, ranked #7 at $368, is a better place to start if sound quality matters.
Why pick the Klipsch Reference R-50M: The current next-generation iteration of Klipsch’s 5.25-inch passive bookshelf speaker. The catch: Awaiting published full NFS preference scores.
Why pick the Klipsch R-51M: A high-efficiency 5.25-inch passive bookshelf speaker featuring Klipsch’s 90 x 90 square Tractrix horn mated to a 1-inch aluminum LTS tweeter and spun-copper IMG woofer. The catch: Anechoic NFS measurements from Erin’s Audio Corner and ASR reveal significant tonal colorations: a sharp treble boost between 2kHz and 6kHz combined with a recessed upper midrange creates a bright, sibilant presentation that causes listener fatigue over time.
Buy the Klipsch Reference R-50M. It is rated higher for sound quality, and the $10 saving on the Klipsch R-51M is not enough to make up the difference.
About the ratings: the Klipsch Reference R-50M’s rating is estimated from measured siblings and predecessors rather than its own measurements, with a likely range of 1.5 to 1.9, so this verdict could change once it is measured.
Looking for alternatives? See the complete Passive Home rankings.
Specifications Side By Side
| Klipsch Reference R-50M | Klipsch R-51M | |
|---|---|---|
| Price | $299.99 per pair Passive | $289.99 per pair Passive |
| Ranked | #155 of 168 in Medium Size Bookshelf Speakers Estimated | #160 of 168 in Medium Size Bookshelf Speakers |
| Crossover Frequency | 1530Hz | 1660Hz |
| Dimensions | 13.9” x 7” x 9” (354 x 178 x 229 mm) | 13.3” x 7” x 8.5” (338 x 178 x 215 mm) |
| Drivers | 1” aluminum LTS tweeter on edge-to-edge Tractrix horn, 5.25” spun-copper TCP woofer | 1” aluminum LTS tweeter on 90x90 Tractrix horn, 5.25” spun-copper IMG woofer |
| Frequency Response | 58Hz - 21kHz (+/- 3dB, Manufacturer specified) | 62Hz - 21kHz (+/- 3dB, Manufacturer specified) |
| Impedance | 8 ohms | 8 ohms |
| Passive | Yes | Yes |
| Sensitivity | 92dB (2.83V @ 1m) | 93dB (2.83V @ 1m) |
| Weight | 11 lbs (5.0 kg) each | 11 lbs (5.0 kg) each |
| Bass Extension (-3dB) | - | 62Hz (measured, Erin’s Audio Corner) |
| Bass Extension (-10dB) | - | 48Hz (measured, Erin’s Audio Corner) |
Related Speaker Comparisons
How Klipsch Reference R-50M compares with other leading options:
- JBL Control 1 Pro vs Klipsch Reference R-50M
- Definitive Technology ProMonitor 1000 vs Klipsch Reference R-50M
- JBL Control 1 Pro vs Klipsch R-51M
- Definitive Technology ProMonitor 1000 vs Klipsch R-51M
- Klipsch R-51M vs Klipsch Reference R-40M
Prices on this page were last checked October 11, 2026 at 4:59 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
Klipsch Reference R-50M: $299.99 per pair Passive Estimated Amazon eBay
Older model: the Klipsch R-51M (ranked lower, rated 1.6/5). See every Klipsch Reference generation.
Same family: the Klipsch Reference R-40M (smaller bookshelf, ranked lower, estimated 1.4/5), the Klipsch Reference R-600F (smaller floorstanding, estimated 1.8/5), the Klipsch Reference R-800F (larger floorstanding, estimated 1.9/5), the Klipsch Reference R-30C (smaller center, estimated 3.4/5) and the Klipsch Reference R-50C (larger center, estimated 3.5/5).
Pros: The current next-generation iteration of Klipsch’s 5.25-inch passive bookshelf speaker. Features an enlarged 90 x 90 edge-to-edge Tractrix horn for wider high-frequency dispersion and enhanced directivity control, paired with a 1-inch aluminum LTS tweeter and updated spun-copper TCP (thermoformed crystalline polymer) woofer with steeper cone angling.
Cons: Awaiting published full NFS preference scores. Continues Klipsch’s energetic horn sound signature with elevated treble that may sound forward in reflective rooms without EQ.
Full Klipsch Reference R-50M review and specifications →
| Released | 2022 (4 years ago) |
|---|---|
| Crossover Frequency | 1530Hz |
| Dimensions | 13.9” x 7” x 9” (354 x 178 x 229 mm) |
| Drivers | 1” aluminum LTS tweeter on edge-to-edge Tractrix horn, 5.25” spun-copper TCP woofer |
| Frequency Response | 58Hz - 21kHz (+/- 3dB, Manufacturer specified) |
| Impedance | 8 ohms |
| Passive | Yes |
| Sensitivity | 92dB (2.83V @ 1m) |
| Weight | 11 lbs (5.0 kg) each |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
Klipsch R-51M: $289.99 per pair Passive Amazon eBay
Newer model: the Klipsch Reference R-50M, ranked higher, estimated 1.7/5, released 2022. See every Klipsch Reference generation.
Same family: the Klipsch R-41M (smaller bookshelf, ranked lower, rated 1.3/5).
Pros: A high-efficiency 5.25-inch passive bookshelf speaker featuring Klipsch’s 90 x 90 square Tractrix horn mated to a 1-inch aluminum LTS tweeter and spun-copper IMG woofer. Delivers high sensitivity (93dB @ 2.83V/1m) that allows it to achieve loud volume levels effortlessly even with low-powered budget amplifiers. Rear-firing Tractrix port provides clean, tight punch down to approximately 62Hz at -3dB, offering noticeably fuller low-end weight than the smaller 4-inch Klipsch R-41M. Measured bass extension of 62Hz (-3dB).
Cons: Anechoic NFS measurements from Erin’s Audio Corner and ASR reveal significant tonal colorations: a sharp treble boost between 2kHz and 6kHz combined with a recessed upper midrange creates a bright, sibilant presentation that causes listener fatigue over time. Requires aggressive DSP/EQ correction to achieve neutral tonal accuracy.
Full Klipsch R-51M review and specifications →
| Released | Nov 2018 (7 years ago) |
|---|---|
| Bass Extension (-10dB) | 48Hz (measured, Erin’s Audio Corner) |
| Bass Extension (-3dB) | 62Hz (measured, Erin’s Audio Corner) |
| Crossover Frequency | 1660Hz |
| Dimensions | 13.3” x 7” x 8.5” (338 x 178 x 215 mm) |
| Drivers | 1” aluminum LTS tweeter on 90x90 Tractrix horn, 5.25” spun-copper IMG woofer |
| Frequency Response | 62Hz - 21kHz (+/- 3dB, Manufacturer specified) |
| Impedance | 8 ohms |
| Passive | Yes |
| Sensitivity | 93dB (2.83V @ 1m) |
| Weight | 11 lbs (5.0 kg) each |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons