Short answer: the JBL HDI-3600 for better sound quality, the Polk T50 for the lower price. The JBL HDI-3600 ranks #58 of 188 floorstanding speakers, rated 4.3/5, at $3,800. The Polk T50 ranks #126, rated 3.8/5, at $374, $3,426 cheaper.
The JBL HDI-3600 is the more accurate pick. 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. Its measured preference score, a predictor of how neutral it sounds, is 4.64 against 4.14 for the Polk T50. The tradeoff: 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 Polk T50 is the deeper-bass option. Pretty deep bass for the price. Its bass reaches about 47Hz before falling 3dB, against 78Hz for the JBL HDI-3600. The catch: 5dB peak at 1kHz, 4dB bright top end from 11kHz on up.
Buy the JBL HDI-3600 when sound quality outweighs the price for you, and the Polk T50 when the price outweighs sound quality instead.
Want more options? Browse the full Passive Home rankings.
Specifications Side By Side
| JBL HDI-3600 | Polk T50 | |
|---|---|---|
| Price | $3800 per pair | $374 per pair |
| Ranked | #58 of 188 in Large Size Floorstanding Speakers | #126 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) | 47Hz (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) | 38Hz (measured, Audio Science Review) |
| Sensitivity | 89.5dB (2.83V/1m, measured, Audio Science Review) | 86.3dB (2.83V/1m, measured by Audio Science Review) |
| Impedance | 4 ohms nominal | 4 ohms nominal (4.2 ohms minimum, measured by Audio Science Review) |
| Frequency Response | 38Hz - 30kHz (+/-3dB) (Manufacturer specified) | - |
| Drivers | 2410H-2 1” compression driver, 3x 6.5” Advanced Aluminum Matrix woofers | 2x 6.5” bi-laminate paper cone woofers, 1x 1” Terylene dome tweeter + 2x 8” passive bass radiators |
| Weight | 61.7 lbs (28 kg) each | 75.4 lbs (34.2 kg) |
| Dimensions | 40.5”H x 10.2”W x 13.5”D (1029 x 260 x 343 mm) | 40.4”H x 9.3”W x 12.5”D (1026.2 x 235.0 x 317.5 mm) |
| Woofer Cabinet | ported, dual rear-firing | passive radiator |
| Spinorama Preference Score | 4.64 (spinorama.org) | 4.14 |
| Spinorama Preference Score with Perfect Sub | 6.95 (spinorama.org) | 6.15 |
| DIY Kit | No | No |
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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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Polk T50: $374 per pair Amazon eBay
Same family: the Polk T15 (bookshelf, rated 1.9/5).
Pros: Pretty deep bass for the price. Distortion at 86dB SPL/1m is reasonably controlled outside a narrow spike around 250Hz. The reviewer notes performance is “not too bad for a budget speaker” once the two main tonal issues are addressed with EQ. Measured bass extension of 47Hz (-3dB), with a measured sensitivity of 86.3dB.
Cons: 5dB peak at 1kHz, 4dB bright top end from 11kHz on up. Just okay vertical off axis. Impedance and phase show several resonances between 200Hz-1kHz, with a minimum impedance of 4.2 ohms. Distortion rises substantially at 96dB SPL/1m across the midrange, with repeated peaks between 100Hz-2kHz.
Full Polk T50 review and specifications →
| Bass Extension (-10dB) | 38Hz (measured, Audio Science Review) |
|---|---|
| Bass Extension (-3dB) | 47Hz (measured, Audio Science Review) |
| DIY Kit | No |
| Dimensions | 40.4”H x 9.3”W x 12.5”D (1026.2 x 235.0 x 317.5 mm) |
| Drivers | 2x 6.5” bi-laminate paper cone woofers, 1x 1” Terylene dome tweeter + 2x 8” passive bass radiators |
| Impedance | 4 ohms nominal (4.2 ohms minimum, measured by Audio Science Review) |
| Sensitivity | 86.3dB (2.83V/1m, measured by Audio Science Review) |
| Spinorama Preference Score | 4.14 |
| Spinorama Preference Score with Perfect Sub | 6.15 |
| Weight | 75.4 lbs (34.2 kg) |
| Woofer Cabinet | passive radiator |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons