Revel Concerta2 F35 vs KLH Model Five

Short answer: the Revel Concerta2 F35. It ranks #23 of 71 floorstanding speakers by sound quality at $900; the KLH Model Five ranks #47 and costs $1999.98, so there is not much of a tradeoff to weigh.

What the Revel Concerta2 F35 offers: Two-and-a-half-way, four-driver design: a 1” aluminum dome tweeter on a waveguide, a 5.25” mid-range, and dual 5.25” mid-bass drivers in a rear-ported cabinet. Measured sensitivity of 89.4dB closely matches the 90dB spec, and distortion looks good at both 86dB and 96dB, holding up well even with a high-pass filter applied. At its sale price (around $900/pair, down from full retail), the reviewer calls it a “no-brainer,” undercutting comparable budget floorstanders like the ELAC DF63. Frequency response and directivity mismatches are largely EQ-able, since most of what shows up in measurements traces to physical tweeter/mid-range separation rather than a fundamental flaw. Compression is fairly well controlled for the price - about 1dB of loss around 100Hz under long-term compression, described as “par for the course” at this cost. Watch for: F3 of 61Hz and F10 of 39Hz mean a subwoofer is needed for real bass extension. A dip in the lower midrange/2-3kHz region reduces attack and detail, and a peak around 5kHz adds some edge and sibilance in the lower treble. A peak in off-axis energy around 3kHz reflects off sidewalls at roughly 60-70° off-axis and arrives louder than the direct sound - this specific issue can’t be fixed with EQ (boosting the direct sound would boost the stronger reflection too) and would need acoustic absorption to properly address, though the reviewer considers it a minor, optional fix at this price. A couple of minor resonances appear in the impedance plot, including one around 300Hz that may partly explain a subtle sense of vocal warmth noticed in listening, though it’s more likely room-related. Minimum impedance around 3.8 ohms. Short-term compression testing shows some increased distortion in the tweeter and higher-frequency compression at loud output.

What the KLH Model Five offers: Exceptionally wide and even horizontal radiation of roughly +/-70-80 degrees gives a spacious soundstage without sacrificing image focus when toed out about 10 degrees. Three rear-panel mid/high attenuation settings are genuinely useful for room and placement matching; Erin preferred Low in his room, with the grille fitted and slight toe-out. The sealed 10-inch acoustic-suspension woofer reaches an Erin-measured F3 near 52Hz and integrates gradually with a subwoofer. At 96dB/1m, harmonic distortion stays mostly below 1%, and multitone distortion is also well controlled. Compression is good at ordinary and high listening levels until the most extreme sweep, supporting convincing dynamics. The included slanted stands aim the unusually low tweeter toward seated ear height. Near-wall placement naturally fills the mild 200Hz baffle-step depression, as the manual intends. Watch for: On-axis response is visibly irregular because the wide vintage baffle creates diffraction, and the upper/lower midbass mismatch around 200Hz can sound lean away from the intended wall placement. Erin heard a mild 800-900Hz resonance that coincides with a clear impedance blip, plus occasional hardness around the 2-4kHz crossover region at elevated level. Vertical directivity is narrow; the included five-degree slant bases are important because the tweeter otherwise aims below seated ears. The top end rolls off relative to the midrange, producing a warm balance that may not suit listeners seeking maximum air. At the highest test level the tweeter develops substantial compression. Large size, 52lb weight with stand and roughly $2,000/pair price are significant commitments, and subwoofers remain necessary for the lowest octave.

Buy the Revel Concerta2 F35. It ranks higher for sound quality than the KLH Model Five and costs less, so there is no real case for the other one.

Specifications Side By Side

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The Two Speakers In Full

Revel Concerta2 F35: $900 Crutchfield eBay

Pros: Two-and-a-half-way, four-driver design: a 1” aluminum dome tweeter on a waveguide, a 5.25” mid-range, and dual 5.25” mid-bass drivers in a rear-ported cabinet. Measured sensitivity of 89.4dB closely matches the 90dB spec, and distortion looks good at both 86dB and 96dB, holding up well even with a high-pass filter applied. At its sale price (around $900/pair, down from full retail), the reviewer calls it a “no-brainer,” undercutting comparable budget floorstanders like the ELAC DF63. Frequency response and directivity mismatches are largely EQ-able, since most of what shows up in measurements traces to physical tweeter/mid-range separation rather than a fundamental flaw. Compression is fairly well controlled for the price - about 1dB of loss around 100Hz under long-term compression, described as “par for the course” at this cost.

Cons: F3 of 61Hz and F10 of 39Hz mean a subwoofer is needed for real bass extension. A dip in the lower midrange/2-3kHz region reduces attack and detail, and a peak around 5kHz adds some edge and sibilance in the lower treble. A peak in off-axis energy around 3kHz reflects off sidewalls at roughly 60-70° off-axis and arrives louder than the direct sound - this specific issue can’t be fixed with EQ (boosting the direct sound would boost the stronger reflection too) and would need acoustic absorption to properly address, though the reviewer considers it a minor, optional fix at this price. A couple of minor resonances appear in the impedance plot, including one around 300Hz that may partly explain a subtle sense of vocal warmth noticed in listening, though it’s more likely room-related. Minimum impedance around 3.8 ohms. Short-term compression testing shows some increased distortion in the tweeter and higher-frequency compression at loud output.

Full Revel Concerta2 F35 review and specifications →

Bass Extension (-10dB)	50Hz (measured, Erin's Audio Corner)
Bass Extension (-3dB)	70Hz (measured, Erin's Audio Corner)
Dimensions	40.3"H x 8.4"W x 12.2"D (1023.6 x 213.4 x 309.9 mm)
Drivers	3x 5.25" deep anodized aluminum cone woofers, 1" Aluminum Tweeter
Impedance	6 ohms nominal (3.8 ohms minimum, measured by Erin's Audio Corner)
Sensitivity	89.4dB (measured, Erin's Audio Corner; 90dB manufacturer specified)
Weight	41 lbs / 18.6 kg each
Woofer Cabinet	ported, rear

• Links
  • Official Revel Concerta2 F35 Website
• Reviews, Comparisons and Sound Samples
  • Audio Science Review Revel Concerta2 F35 More from Audio Science Review →
  • Erin’s Audio Corner: Revel F35 Review: Great Sound, Lower Price! More from Erin’s Audio Corner →
  • Erin’s Audio Review Website Revel Concerta2 F35
  • Audio Science Review Measurements (spinorama.org)
  • Reddit Search for Revel Concerta2 F35 Review
• Head-to-Head Comparisons
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KLH Model Five: $1999.98 Crutchfield eBay

Pros: Exceptionally wide and even horizontal radiation of roughly +/-70-80 degrees gives a spacious soundstage without sacrificing image focus when toed out about 10 degrees. Three rear-panel mid/high attenuation settings are genuinely useful for room and placement matching; Erin preferred Low in his room, with the grille fitted and slight toe-out. The sealed 10-inch acoustic-suspension woofer reaches an Erin-measured F3 near 52Hz and integrates gradually with a subwoofer. At 96dB/1m, harmonic distortion stays mostly below 1%, and multitone distortion is also well controlled. Compression is good at ordinary and high listening levels until the most extreme sweep, supporting convincing dynamics. The included slanted stands aim the unusually low tweeter toward seated ear height. Near-wall placement naturally fills the mild 200Hz baffle-step depression, as the manual intends.

Cons: On-axis response is visibly irregular because the wide vintage baffle creates diffraction, and the upper/lower midbass mismatch around 200Hz can sound lean away from the intended wall placement. Erin heard a mild 800-900Hz resonance that coincides with a clear impedance blip, plus occasional hardness around the 2-4kHz crossover region at elevated level. Vertical directivity is narrow; the included five-degree slant bases are important because the tweeter otherwise aims below seated ears. The top end rolls off relative to the midrange, producing a warm balance that may not suit listeners seeking maximum air. At the highest test level the tweeter develops substantial compression. Large size, 52lb weight with stand and roughly $2,000/pair price are significant commitments, and subwoofers remain necessary for the lowest octave.

Full KLH Model Five review and specifications →

Bass Extension (-10dB)	32.2Hz (measured, Erin's Audio Corner)
Bass Extension (-3dB)	52Hz (measured, Erin's Audio Corner)
Dimensions	26"H x 13.8"W x 11.5"D (660 x 350 x 292 mm) without stand
Drivers	10" paper-cone woofer, 4" paper-cone midrange, 1" aluminum-dome tweeter
Impedance	6 ohms nominal, 3.5 ohms minimum at 140Hz (manufacturer specified)
Sensitivity	About 85dB @ 2.83V/1m (measured, Erin's Audio Corner; 87.5dB free-field manufacturer specified)
Weight	44.1 lbs / 20 kg each without stand; 52 lbs / 23.6 kg with stand
Woofer Cabinet	sealed acoustic suspension

• Links
  • Official KLH Model Five Website
• Reviews, Comparisons and Sound Samples
  • Erin’s Audio Corner: KLH Model 5. The Safest Audiophile Speaker? More from Erin’s Audio Corner →
  • Erin’s Audio Corner Website: KLH Model Five
  • Erin’s Audio Corner Measurements (spinorama.org)
  • Reddit Search for KLH Model Five Review
• Head-to-Head Comparisons
  • KLH Model Five vs KEF Q11 Meta
  • KLH Model Five vs Klipsch RP-8000F II
  • KLH Model Five vs Morel Avyra 633
  • KLH Model Five vs Arendal 1961 Tower
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