Short answer: the Klipsch RP-500M II. It ranks #7 of 21 bookshelf speakers at $389.99; the Radiant Acoustics Clarity 4.2 ranks #9 and costs $2998, so there is not much of a tradeoff to weigh.
On the Klipsch RP-500M II side: Major mid-range clarity improvement over the original RP-500M: about a 5dB fill-in between 1-3kHz in the estimated in-room response. The catch: Klipsch’s quoted sensitivity (around 92-93dB) uses an unconventional in-room-based rating rather than the standard anechoic measurement.
The case for the Radiant Acoustics Clarity 4.2: Compact bookshelf design using a 4” Purifi mid-woofer with matching Purifi passive radiators and an AMT tweeter on a purpose-designed. The tradeoff: Low sensitivity (rated 78dB, measured 78.5dB) is the trade-off for its bass extension - needs a fair amount of amplifier power.
Buy the Klipsch RP-500M II if the ranking matters more than the price. Buy the Radiant Acoustics Clarity 4.2 if the price matters more than the ranking.
Specifications Side By Side
| Klipsch RP-500M II | Radiant Acoustics Clarity 4.2 | |
|---|---|---|
| Price | $389.99 | $2,998 |
| Ranked | #7 of 21 in Medium Size Bookshelf Speakers | #9 of 21 in Medium Size Bookshelf Speakers |
| Bass Extension (-10dB) | 53Hz | 35 Hz |
| Bass Extension (-3dB) | 67Hz | 44 Hz |
| Crossover Frequency | 1530Hz | - |
| Dimensions | 13.56"H x 6.81"W x 10.65"D (344.4 x 173 x 270.5 mm) | 9.5"H x 6.3"W x 9.4"D (241 x 160 x 239 mm) |
| Impedance | 8 ohms | 4 ohms |
| Sensitivity | 85dB | 78 dB |
| Drivers | 5.25" Cerametallic™ cone woofer with Faraday rings, 1" LTS Titanium diaphragm tweeter with Hybrid Cross-Section Expanded Tractrix® horn | (2) 4" (102mm) woofer + AMT tweeter |
| Weight | 13 lbs / 5.9 kg each | 28.7 lbs / 13 kg (per pair: 57.3 lbs / 26 kg) |
| Woofer Cabinet | Rear ported | - |
| Enclosure | - | sealed |
| Frequency Response | - | 40 Hz - 25 kHz |
| Woofer | - | 4" (102mm) PURIFI USHINDI |
| Tweeter | - | AMT (Air Motion Transformer) |
| Amplifier Required | - | Yes |
| Recommended Power | - | 50-200W |
The Two Speakers In Full
Klipsch RP-500M II: $389.99 Amazon
Pros: Major mid-range clarity improvement over the original RP-500M: about a 5dB fill-in between 1-3kHz in the estimated in-room response, giving a noticeably more resolved, detailed midrange. More neutral and linear overall than its sibling RP-600M II, which carries about 2-3dB more high-frequency energy and a touch more bass but less overall balance. Very precise soundstage imaging and instrument placement. Distortion through the midrange is cleaner than the previous generation.
Cons: Klipsch’s quoted sensitivity (around 92-93dB) uses an unconventional in-room-based rating rather than the standard anechoic measurement; on an anechoic basis it measures closer to about 85dB, in line with typical bookshelf speakers this size, so it isn’t the outlier in efficiency the spec sheet implies. Horizontal dispersion of about ±40-50° is narrower and more directive than the reviewer’s preference for a wider, more enveloping soundstage. Toeing the speaker out to widen the soundstage or soften on-axis brightness comes at some cost to imaging precision. Slightly less clean in the tweeter region than the midrange, likely tied to crossover placement, though not considered a dealbreaker. Low-frequency output is limited - measured around 95dB at 4 meters for the pair before the woofers started to unload, so a subwoofer is recommended for anyone wanting real bass rather than stepping up to a larger model.
| Bass Extension (-10dB) | 53Hz |
|---|---|
| Bass Extension (-3dB) | 67Hz |
| Crossover Frequency | 1530Hz |
| Dimensions | 13.56"H x 6.81"W x 10.65"D (344.4 x 173 x 270.5 mm) |
| Drivers | 5.25" Cerametallic™ cone woofer with Faraday rings, 1" LTS Titanium diaphragm tweeter with Hybrid Cross-Section Expanded Tractrix® horn |
| Impedance | 8 ohms |
| Sensitivity | 85dB |
| Weight | 13 lbs / 5.9 kg each |
| Woofer Cabinet | Rear ported |
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
- Links
Radiant Acoustics Clarity 4.2: $2,998 Radiant Acoustics
Pros: Compact bookshelf design using a 4” Purifi mid-woofer with matching Purifi passive radiators and an AMT tweeter on a purpose-designed waveguide, built with genuine heft - aluminum baffle, extensive internal bracing and damping. Surprisingly wide horizontal dispersion (about ±70° through the midrange and into the treble), more enveloping than its larger 6.2 sibling despite the smaller cabinet. More linear on-axis than the bigger Clarity 6.2, which needs 15-20° of toe-out to tame a rising treble; the 4.2 can be listened to closer to on-axis without that same correction. Wider-than-typical vertical dispersion (roughly +30°/-20°) for a two-way design, since its smaller woofer keeps the tweeter-to-woofer distance short. Genuinely deep bass extension for its size (F3 44Hz, reaching about 40Hz in-room), though it comes at a real cost to sensitivity. No resonance issues visible in impedance measurements.
Cons: Low sensitivity (rated 78dB, measured 78.5dB) is the trade-off for its bass extension - needs a fair amount of amplifier power, around 100W recommended for small-to-medium rooms versus the manufacturer’s own 60W baseline. Designed specifically for smaller rooms; the reviewer had to move testing out of his open-plan living room and into a smaller bedroom to avoid running into compression. A dip in the upper midrange gives a mild lack of attack and clarity, and a peak around 5kHz occasionally added a touch of extra sibilance. Multitone distortion crosses the reviewer’s 3% threshold at 96dB, making about 88dB a better average listening level; a slight upper-midrange bump persists even with an 80Hz high-pass filter applied. Dynamic range is limited: fine at 86dB, but the woofer starts giving up headroom by 96dB and drops off significantly by 102dB. Compared to its pricier sibling Clarity 6.2, has notably less dynamic range and higher multitone distortion, reflecting the smaller driver complement. A niche product size-wise - the reviewer couldn’t identify a clear direct competitor in the same size/price/SPL class.
| Amplifier Required | Yes |
|---|---|
| Bass Extension (-10dB) | 35 Hz |
| Bass Extension (-3dB) | 44 Hz |
| Dimensions | 9.5"H x 6.3"W x 9.4"D (241 x 160 x 239 mm) |
| Drivers | (2) 4" (102mm) woofer + AMT tweeter |
| Enclosure | sealed |
| Frequency Response | 40 Hz - 25 kHz |
| Impedance | 4 ohms |
| Recommended Power | 50-200W |
| Sensitivity | 78 dB |
| Tweeter | AMT (Air Motion Transformer) |
| Weight | 28.7 lbs / 13 kg (per pair: 57.3 lbs / 26 kg) |
| Woofer | 4" (102mm) PURIFI USHINDI |
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
- Radiant Acoustics Clarity 4.2 vs Arendal 1961 Monitor
- Radiant Acoustics Clarity 4.2 vs Ascend Sierra 1 v2
- Radiant Acoustics Clarity 4.2 vs Audiofirst Fidelia
- Radiant Acoustics Clarity 4.2 vs ELAC Uni-Fi 2.0 UB52
- Radiant Acoustics Clarity 4.2 vs KEF LS50 Meta
- Radiant Acoustics Clarity 4.2 vs Moondrop M4P MTM
- Radiant Acoustics Clarity 4.2 vs Philharmonic Affordable Accuracy Monitor
- Radiant Acoustics Clarity 4.2 vs Totem Kin One
- Radiant Acoustics Clarity 4.2 vs JBL Studio 530
- Links
As an Amazon Associate I earn from qualifying purchases.
Product prices and availability were last checked August 9, 2026 at 6:57 AM UTC 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.