Short answer: the Ascend Acoustics Sierra-LX. It ranks #37 of 222 bookshelf speakers by sound quality (rated 4.3/5) at $1,598 and is still sold new; the JBL HDI-1600 ranks #52 (rated 4.2/5) and is discontinued, so it is only an option used.
The Ascend Acoustics Sierra-LX is the more accurate, deeper-bass option. A compact bookshelf speaker with very neutral, flat sound, a wide soundstage, and surprisingly deep bass in a bamboo cabinet. Its measured preference score, a predictor of how neutral it sounds, is 6.63 against 5.37 for the JBL HDI-1600. Its bass reaches about 47Hz before falling 3dB, against 55.7Hz for the JBL HDI-1600. The catch: Very low sensitivity at about 81dB, so it needs a genuinely powerful amplifier to reach normal listening levels.
What the JBL HDI-1600 does well: A bookshelf speaker with very flat mids and treble, smooth dispersion, and a slight bass lift that sounds full and natural. The tradeoff: A dip appears above 10kHz on-axis.
Buy the Ascend Acoustics Sierra-LX. It is rated higher for sound quality, and the JBL HDI-1600 is discontinued, so it is only available used.
Want more options? Browse the full Passive Home rankings.
Measured Differences
- Bass depth: the Ascend Acoustics Sierra-LX reaches 47 Hz (3 dB down) against 55.7 Hz for the JBL HDI-1600, about half an octave deeper. You hear more of the lowest bass notes and kick drums.
- Efficiency: the JBL HDI-1600 is rated at 85 dB sensitivity against 81 dB for the Ascend Acoustics Sierra-LX, so it plays as loud with roughly half the amplifier power.
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Specifications Side By Side
| Ascend Acoustics Sierra-LX | JBL HDI-1600 | |
|---|---|---|
| Price | $1598 per pair | $1980 per pair Discontinued |
| Ranked | #37 of 222 in Large Size Bookshelf Speakers | #52 of 222 in Large Size Bookshelf Speakers |
| Bass Extension (-10dB) | 38Hz (measured, Erin’s Audio Corner) | 40Hz (derived, log-interpolated between spinorama.org -9dB/-12dB points) |
| Bass Extension (-3dB) | 47Hz (measured, Erin’s Audio Corner) | 55.7Hz (measured, Audio Science Review) |
| Dimensions | 14.3” x 7.5” x 10.5” (362 x 191 x 267 mm) | 14.6”H x 9.1”W x 11.4”D (370.0 x 230.0 x 288.9 mm) |
| Impedance | 8 ohms nominal (5.5 ohms minimum) | 4 ohms nominal (measured, Audio Science Review) |
| Sensitivity | 81dB (2.83V/1m, measured by Erin’s Audio Corner) | 85dB (2.83V/1m, measured, Audio Science Review) |
| Drivers | 6” aluminum cone woofer, 26mm dome tweeter | 1” tweeter + 6.5” woofer |
| Weight | 20.9 lbs (9.5 kg) | 53.4 lbs (24.2 kg) |
| Woofer Cabinet | Bass reflex, flared rear port | ported, rear |
| Power Handling | 350W continuous, 500W peak | - |
| Frequency Response | 28Hz - 23kHz (in-room, manufacturer specified) | - |
| Country | USA | - |
| Spinorama Preference Score | 6.63 | 5.37 (spinorama.org) |
| Spinorama Preference Score with Perfect Sub | 8.44 | 7.32 (spinorama.org) |
| DIY Kit | No | No |
Where the Ratings Come From
- Ascend Acoustics Sierra-LX: Spinorama.org measurements and reviews by Erin’s Audio Corner.
- JBL HDI-1600: 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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