Short answer: the JBL HDI-3600 if sound quality matters most, the Klipsch RP-8000F II if price matters most. The JBL HDI-3600 ranks #58 of 188 floorstanding speakers, rated 4.3/5, at $3,800. The Klipsch RP-8000F II ranks #113, rated 3.9/5, at $1,159.98, $2,640.02 cheaper.
The JBL HDI-3600 is the better-sounding option. CEA2034 spinorama shows a fairly even on-axis response and flat overall frequency response, with high 90dB sensitivity and very low distortion through the midrange. Watch for: A wide shelving-down above 2kHz affects the in-room response, and vertical dispersion is a bigger issue than horizontal: the reviewer noted the dip is wider here than on the smaller HDI-1600, making it more audible.
The Klipsch RP-8000F II is the more accurate, deeper-bass option. Highest sensitivity of the RP II floorstander line (~92dB measured) and the best dynamics/compression behavior of the three under load: the cleanest at high output. Its measured preference score, a predictor of how neutral it sounds, is 5.39 against 4.64 for the JBL HDI-3600. Its bass reaches about 67Hz before falling 3dB, against 78Hz for the JBL HDI-3600. The catch: Mid-bass sounds lean despite the dual 8-inch woofers, and bass extension disappointed for its size: expected to reach 50Hz, didn’t get there in-room.
Buy the JBL HDI-3600 if sound quality matters more than the price. Buy the Klipsch RP-8000F II if the price matters more than sound quality.
Still deciding? The full Passive Home rankings cover every ranked option.
Specifications Side By Side
| JBL HDI-3600 | Klipsch RP-8000F II | |
|---|---|---|
| Price | $3800 per pair | $1,159.98 per pair |
| Ranked | #58 of 188 in Large Size Floorstanding Speakers | #113 of 188 in Large Size Floorstanding Speakers |
| Bass Extension (-3dB) | 78Hz - the on-axis curve also shows an unusual step/dip around 40-55Hz that may be a near-field-scan artifact for this tower (measured, Audio Science Review) | 67Hz (measured, Erin’s Audio Corner) |
| Bass Extension (-10dB) | 62Hz - the on-axis curve also shows an unusual step/dip around 40-55Hz that may be a near-field-scan artifact for this tower (measured, Audio Science Review) | 33Hz (measured, Erin’s Audio Corner) |
| Sensitivity | 89.5dB (2.83V/1m, measured, Audio Science Review) | 92dB (2.83V/1m, measured by Erin’s Audio Corner) |
| Impedance | 4 ohms nominal | 8 ohms nominal (3.7 ohms minimum above 80Hz, measured by Erin’s Audio Corner) |
| Frequency Response | 38Hz - 30kHz (+/-3dB) (Manufacturer specified) | 35Hz - 25kHz (+-3dB, Manufacturer specified) |
| Drivers | 2410H-2 1” compression driver, 3x 6.5” Advanced Aluminum Matrix woofers | 1” titanium tweeter with 90x90 Tractrix horn, dual 8” cerametallic woofers |
| Weight | 61.7 lbs (28 kg) each | 61.3 lbs (27.8 kg) |
| Dimensions | 40.5”H x 10.2”W x 13.5”D (1029 x 260 x 343 mm) | 43.1” x 10.8” x 18.3” (1095 x 275 x 464 mm) |
| Woofer Cabinet | ported, dual rear-firing | ported, rear |
| Spinorama Preference Score | 4.64 (spinorama.org) | 5.39 |
| Spinorama Preference Score with Perfect Sub | 6.95 (spinorama.org) | 7.12 |
| DIY Kit | No | No |
| Crossover Frequency | - | 1630Hz |
| Power Handling | - | 150W continuous, 600W peak |
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Prices on this page were last checked October 7, 2026 at 9:25 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
JBL HDI-3600: $3800 per pair Audio Advice eBay
Same family: the JBL HDI-1600 (bookshelf, rated 4.2/5), the JBL HDI-3800 (larger floorstanding, ranked higher, rated 4.5/5) and the JBL HDI-4500 (center, rated 3.7/5).
Pros: CEA2034 spinorama shows a fairly even on-axis response and flat overall frequency response, with high 90dB sensitivity and very low distortion through the midrange. Triple 6.5” Advanced Aluminum Matrix woofers and a 1” compression driver in JBL’s HDI waveguide. Measured bass extension of 78Hz (-3dB), with a measured sensitivity of 89.5dB.
Cons: A wide shelving-down above 2kHz affects the in-room response, and vertical dispersion is a bigger issue than horizontal: the reviewer noted the dip is wider here than on the smaller HDI-1600, making it more audible. Narrow vertical sweet spot means careful listener-height positioning matters more than usual.
Full JBL HDI-3600 review and specifications →
| Bass Extension (-10dB) | 62Hz - the on-axis curve also shows an unusual step/dip around 40-55Hz that may be a near-field-scan artifact for this tower (measured, Audio Science Review) |
|---|---|
| Bass Extension (-3dB) | 78Hz - the on-axis curve also shows an unusual step/dip around 40-55Hz that may be a near-field-scan artifact for this tower (measured, Audio Science Review) |
| DIY Kit | No |
| Dimensions | 40.5”H x 10.2”W x 13.5”D (1029 x 260 x 343 mm) |
| Drivers | 2410H-2 1” compression driver, 3x 6.5” Advanced Aluminum Matrix woofers |
| Frequency Response | 38Hz - 30kHz (+/-3dB) (Manufacturer specified) |
| Impedance | 4 ohms nominal |
| Sensitivity | 89.5dB (2.83V/1m, measured, Audio Science Review) |
| Spinorama Preference Score | 4.64 (spinorama.org) |
| Spinorama Preference Score with Perfect Sub | 6.95 (spinorama.org) |
| Weight | 61.7 lbs (28 kg) each |
| Woofer Cabinet | ported, dual rear-firing |
- Links
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Klipsch RP-8000F II: $1,159.98 per pair Amazon eBay
Same family: the Klipsch RP-500M II (smaller bookshelf, rated 4/5), the Klipsch RP-600M II (larger bookshelf, rated 3.7/5), the Klipsch RP-5000F II (smaller floorstanding, ranked higher, rated 4/5), the Klipsch RP-6000F II (smaller floorstanding, ranked lower, rated 3.9/5), the Klipsch RP-404C II (smallest center, rated 3.7/5), the Klipsch RP-500C II (center, rated 3.9/5) and the Klipsch RP-504C II (largest center, rated 3.8/5).
Pros: Highest sensitivity of the RP II floorstander line (~92dB measured) and the best dynamics/compression behavior of the three under load: the cleanest at high output. Dual 8-inch woofers and the highest power handling in the line. Measured bass extension of 67Hz (-3dB), with a measured sensitivity of 92dB.
Cons: Mid-bass sounds lean despite the dual 8-inch woofers, and bass extension disappointed for its size: expected to reach 50Hz, didn’t get there in-room. Has its own edgy upper-mid bump (2-6kHz) that’s harder to EQ out than the other two models’ issues, since it stems from the vertical horn/woofer offset rather than simple tonal balance. The most placement-critical of the three, with the narrowest horizontal (~40-50 degrees) and vertical (+5/-10 degrees) dispersion.
Full Klipsch RP-8000F II review and specifications →
| Bass Extension (-10dB) | 33Hz (measured, Erin’s Audio Corner) |
|---|---|
| Bass Extension (-3dB) | 67Hz (measured, Erin’s Audio Corner) |
| Crossover Frequency | 1630Hz |
| DIY Kit | No |
| Dimensions | 43.1” x 10.8” x 18.3” (1095 x 275 x 464 mm) |
| Drivers | 1” titanium tweeter with 90x90 Tractrix horn, dual 8” cerametallic woofers |
| Frequency Response | 35Hz - 25kHz (+-3dB, Manufacturer specified) |
| Impedance | 8 ohms nominal (3.7 ohms minimum above 80Hz, measured by Erin’s Audio Corner) |
| Power Handling | 150W continuous, 600W peak |
| Sensitivity | 92dB (2.83V/1m, measured by Erin’s Audio Corner) |
| Spinorama Preference Score | 5.39 |
| Spinorama Preference Score with Perfect Sub | 7.12 |
| Weight | 61.3 lbs (27.8 kg) |
| Woofer Cabinet | ported, rear |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
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