Short answer: the JBL HDI-3600 for control, the Polk Audio XT60 for cheap bass extension. The XT60 uses a 6.5-inch woofer and two 6.5-inch passive radiators to reach 43.9Hz at -3dB and 38.1Hz at -10dB, genuinely deep for a budget tower at $458 against the JBL’s $3,800, but its bass alignment Q is the least controlled here and owners report a loose, boomy low end. The HDI-3600 is the flatter, more efficient speaker at 90dB.
Buy the JBL HDI-3600 when sound quality outweighs the price for you, and the Polk Audio XT60 when the price outweighs sound quality instead.
Still deciding? The full Passive Home rankings cover every ranked option.
Specifications Side By Side
| JBL HDI-3600 | Polk Audio XT60 | |
|---|---|---|
| Price | $3800 per pair | $458 per pair |
| Ranked | #31 of 74 in Large Size Floorstanding Speakers | #59 of 74 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) | 43.9Hz (measured, spinorama.org) |
| 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) | 38.1Hz (measured, spinorama.org) |
| Sensitivity | 89.5dB (2.83V/1m, measured, Audio Science Review) | 86dB (1W/1m) |
| Impedance | 4 ohms nominal | 4/8-ohm compatible |
| Frequency Response | 38Hz - 30kHz (+/-3dB) (Manufacturer specified) | - |
| Drivers | 2410H-2 1” compression driver, 3x 6.5” Advanced Aluminum Matrix woofers | 1” Terylene dome tweeter, 6.5” bilaminate polypropylene woofer, 2x 6.5” passive radiators |
| Weight | 61.7 lbs (28 kg) each | 20 lbs (9.07 kg) each |
| Dimensions | 40.5”H x 10.2”W x 13.5”D (1029 x 260 x 343 mm) | 19.05 x 92.5 x 23.09cm (7.5 x 36.4 x 9.09 in) each |
| Woofer Cabinet | ported, dual rear-firing | Passive radiator-loaded |
| Spinorama Preference Score | 4.64 (spinorama.org) | 5.19 |
| Spinorama Preference Score with Perfect Sub | 6.95 (spinorama.org) | 7.13 |
| DIY Kit | No | No |
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Prices on this page were last checked October 3, 2026 at 10:26 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
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 |
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- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
Polk Audio XT60: $458 per pair Amazon B&H Photo Video Crutchfield eBay
Pros: Passive-radiator-loaded design (6.5” woofer plus two 6.5” passive radiators) gives deeper bass than the driver size alone would suggest: 43.9Hz at -3dB / 38.1Hz at -10dB, genuinely competitive extension for a budget tower. Hi-Res Audio certified, Dolby Atmos/DTS:X compatible, and works with either 4- or 8-ohm amplifier outputs. Measured bass extension of 43.9Hz (-3dB).
Cons: Bass alignment Q (lfq 0.96) is the highest, least-controlled figure in this entire batch, consistent with owner reports of a slightly loose, boomy low end at higher volumes. On-axis response is also relatively uneven, with narrow-band deviation of about 0.51dB. The vinyl-wrapped (not wood veneer) cabinet reads as budget up close per owner reviews, and at least one owner reported blowing a driver under sustained heavy bass: some caution is warranted with bass-heavy source material at volume.
Full Polk Audio XT60 review and specifications →
| Bass Extension (-10dB) | 38.1Hz (measured, spinorama.org) |
|---|---|
| Bass Extension (-3dB) | 43.9Hz (measured, spinorama.org) |
| DIY Kit | No |
| Dimensions | 19.05 x 92.5 x 23.09cm (7.5 x 36.4 x 9.09 in) each |
| Drivers | 1” Terylene dome tweeter, 6.5” bilaminate polypropylene woofer, 2x 6.5” passive radiators |
| Impedance | 4/8-ohm compatible |
| Sensitivity | 86dB (1W/1m) |
| Spinorama Preference Score | 5.19 |
| Spinorama Preference Score with Perfect Sub | 7.13 |
| Weight | 20 lbs (9.07 kg) each |
| Woofer Cabinet | Passive radiator-loaded |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
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