Short answer: the JBL HDI-3600 for better sound quality, the SVS Ultra Evolution Pinnacle for the lower price. The JBL HDI-3600 ranks #28 of 71 floorstanding speakers at $3800. The SVS Ultra Evolution Pinnacle ranks #49 at $2499.99, $1300.01 cheaper.
What the JBL HDI-3600 offers: 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. 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. Narrow vertical sweet spot means careful listener-height positioning matters more than usual.
What the SVS Ultra Evolution Pinnacle offers: Flagship three-way tower with a diamond-coated tweeter, dual midranges and four force-balanced 8-inch woofers. Erin measured exceptional 27Hz extension, broad roughly +/-75-degree horizontal coverage, an 88.1dB sensitivity and a 4.03 preference score even without a subwoofer. Watch for: The 5.25-to-8-inch transitions and complex array do not produce class-leading smoothness: 0.184 on-axis, 0.226 predicted in-room and 3.64 directivity-index consistency. At 96.7 pounds each, these are difficult to position, and their Q of 1.25 indicates some bass emphasis.
Buy the JBL HDI-3600 if sound quality matters more than the price. Buy the SVS Ultra Evolution Pinnacle if the price matters more than sound quality.
Specifications Side By Side
| JBL HDI-3600 | SVS Ultra Evolution Pinnacle | |
|---|---|---|
| Price | $3800 | $2,499.99 each |
| Ranked | #28 of 71 in Large Size Floorstanding Speakers | #49 of 71 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) | - |
| 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) | - |
| Sensitivity | 89.5dB (2.83V/1m, measured, Audio Science Review) | 88dB |
| Impedance | 4 ohms nominal | 6 ohms nominal |
| Frequency Response | 38Hz - 30kHz (+/-3dB) (Manufacturer specified) | - |
| Drivers | 2410H-2 1" compression driver, 3x 6.5" Advanced Aluminum Matrix woofers | 1" diamond-coated tweeter, dual 5.25" midranges, quad 8" woofers |
| Weight | 61.7 lbs / 28 kg each | 96.7 lbs each |
| Dimensions | 40.5"H x 10.2"W x 13.5"D (1029 x 260 x 343 mm) | 50.2H x 11.8W x 18.1D in |
| Woofer Cabinet | ported, dual rear-firing | - |
| Enclosure | - | 3-way passive, dual rear ports |
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Prices on this page were last checked August 25, 2026 at 6:19 AM 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 Audioadvice eBay
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.
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) |
| 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) |
| Weight | 61.7 lbs / 28 kg each |
| Woofer Cabinet | ported, dual rear-firing |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
SVS Ultra Evolution Pinnacle: $2,499.99 each SVS eBay
Pros: Flagship three-way tower with a diamond-coated tweeter, dual midranges and four force-balanced 8-inch woofers. Erin measured exceptional 27Hz extension, broad roughly +/-75-degree horizontal coverage, an 88.1dB sensitivity and a 4.03 preference score even without a subwoofer.
Cons: The 5.25-to-8-inch transitions and complex array do not produce class-leading smoothness: 0.184 on-axis, 0.226 predicted in-room and 3.64 directivity-index consistency. At 96.7 pounds each, these are difficult to position, and their Q of 1.25 indicates some bass emphasis.
Full SVS Ultra Evolution Pinnacle review and specifications →
| Dimensions | 50.2H x 11.8W x 18.1D in |
|---|---|
| Drivers | 1" diamond-coated tweeter, dual 5.25" midranges, quad 8" woofers |
| Enclosure | 3-way passive, dual rear ports |
| Impedance | 6 ohms nominal |
| Sensitivity | 88dB |
| Weight | 96.7 lbs each |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
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