Short answer: the Ascend Acoustics Sierra Titan Tower. It ranks #45 of 228 floorstanding speakers by sound quality, rated 4.4/5, at $2,998; the JBL HDI-3600 ranks #63, rated 4.3/5, and costs $3,800, so there is not much of a tradeoff to weigh.
The Ascend Acoustics Sierra Titan Tower is the more accurate, deeper-bass choice. Accurate floorstanding speakers with a premium tweeter and controlled bass, hand matched pairs and a long seven year warranty. Its measured preference score, a predictor of how neutral it sounds, is 6.05 against 4.64 for the JBL HDI-3600. Its bass reaches about 58.6Hz before falling 3dB, against 78Hz for the JBL HDI-3600. The tradeoff: Its listening window response is the least smooth of Ascend’s measured towers, trailing the pricier Ascend Acoustics ELX Ribbon Tower.
Why pick the JBL HDI-3600: Floorstanding speakers with a horn tweeter, triple woofers, high sensitivity and very low distortion, made for loud music and movies. 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 JBL HDI-1600, making it more audible.
Buy the Ascend Acoustics Sierra Titan Tower. It is rated higher for sound quality than the JBL HDI-3600 and costs less, so only choose the other one for a particular feature it does better.
Looking for alternatives? See the complete Passive Home rankings.
Measured Differences
- Bass depth: the Ascend Acoustics Sierra Titan Tower reaches 34.6 Hz (10 dB down) against 62 Hz for the JBL HDI-3600, about an octave deeper. Low bass that the other only hints at comes through with real weight.
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Specifications Side By Side
| Ascend Acoustics Sierra Titan Tower | JBL HDI-3600 | |
|---|---|---|
| Price | $2,998 per pair | $3800 per pair |
| Ranked | #45 of 228 in Large Size Floorstanding Speakers | #63 of 228 in Large Size Floorstanding Speakers |
| Enclosure | ported | - |
| Drivers | SEAS Titan dome tweeter, 1x 5.25” midrange (sealed sub-chamber), 2x 5.25” mineral filled polypropylene woofers | 2410H-2 1” compression driver, 3x 6.5” Advanced Aluminum Matrix woofers |
| Dimensions | 43”H x 7.5”W x 10.5”D (1092 x 190 x 267 mm) | 40.5”H x 10.2”W x 13.5”D (1029 x 260 x 343 mm) |
| Weight | 45 lbs (20.4 kg) each | 61.7 lbs (28 kg) each |
| Sensitivity | 88dB @ 2.83V/1m in-room (manufacturer) | 89.5dB (2.83V/1m, measured, Audio Science Review) |
| Impedance | 8 ohms nominal | 4 ohms nominal |
| Power Handling | 300W continuous, 500W peak | - |
| Frequency Response | 32-27,000Hz typical in-room (manufacturer) | 38Hz - 30kHz (+/-3dB) (Manufacturer specified) |
| Bass Extension (-3dB) | 58.6Hz (measured, spinorama.org vendor data) | 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) | 34.6Hz (measured, spinorama.org vendor data) | 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) |
| Warranty | 7 years parts and labor | - |
| Country | United States | - |
| Spinorama Preference Score | 6.05 | 4.64 (spinorama.org) |
| Spinorama Preference Score with Perfect Sub | 8.00 | 6.95 (spinorama.org) |
| DIY Kit | No | No |
| Woofer Cabinet | - | ported, dual rear-firing |
Where the Ratings Come From
- Ascend Acoustics Sierra Titan Tower: Spinorama.org measurements.
- JBL HDI-3600: Spinorama.org measurements and reviews by Audio Science Review.
This comparison is generated from the ratings, specifications and measurements on each product’s own page, and it updates when that data changes. How we rank explains how each rating is decided.
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