Short answer: the Magnepan LRS+, if you are buying new. The JBL HDI-3800 ranks higher than it (#14 vs #61 of 73 floorstanding speakers, 4.5/5 vs 3.5/5) but is discontinued, so only consider it used; the Magnepan LRS+ is still sold new at $1,300.
The case for the JBL HDI-3800: 2410H-2 1” Teonex compression driver matched to a custom High-Definition Imaging (HDI) horn geometry achieves exceptional horizontal directivity control, high output capability, and effortless transient response. The catch: On-axis frequency response features a narrow upper-frequency elevation around 8-10kHz, performing noticeably smoother when toed out 10-20° off-axis.
What the Magnepan LRS+ does well: Thin, two-way planar-magnetic open-baffle/dipole panel design (about 48” tall, just 1” deep). The tradeoff: Extremely current-hungry and power-hungry: even a pair of 600W Macintosh monoblock amplifiers only averaged about 90dB output.
Buy the Magnepan LRS+, since the JBL HDI-3800 is discontinued and only worth hunting down used.
Want more options? Browse the full Passive Home rankings.
Specifications Side By Side
| JBL HDI-3800 | Magnepan LRS+ | |
|---|---|---|
| Price | $5,000.00 per pair Discontinued | $1300 per pair |
| Ranked | #14 of 73 in Large Size Floorstanding Speakers | #61 of 73 in Large Size Floorstanding Speakers |
| Bass Extension (-10dB) | 28Hz (measured, Erin’s Audio Corner) | 67Hz (measured, Erin’s Audio Corner) |
| Bass Extension (-3dB) | 37Hz (measured, Erin’s Audio Corner) | 74Hz (measured, Erin’s Audio Corner) |
| Dimensions | 43.3”H x 11.8”W x 16.4”D (1100.5 x 300.0 x 417.8 mm) | 48”H x 13.5”W x 1”D (1219.2 x 342.9 x 25.4 mm) |
| Impedance | 4 ohms nominal (3.8 ohms minimum, measured by Erin’s Audio Corner) | 4 ohms nominal, 3 ohms minimum (measured, Erin’s Audio Corner) |
| Sensitivity | 92dB (measured average, Erin’s Audio Corner) | 85.1dB (measured, Erin’s Audio Corner) |
| Drivers | 1 in. 2410H-2 Teonex compression driver with HDI horn, triple 8 in. Advanced Aluminum Matrix cone woofers | Full-range planar magnetic dipole panel (48” tall x 13.5” wide); quasi-ribbon design, two-way with separate mid/bass and tweeter ribbon sections |
| Weight | 83.8 lbs (38.0 kg) each | 30 lbs (13.6 kg) |
| Woofer Cabinet | ported, rear | open baffle |
| Spinorama Preference Score | 5.62 | 1.27 |
| Spinorama Preference Score with Perfect Sub | 7.03 | 4.32 |
| DIY Kit | No | No |
Related Speaker Comparisons
More top alternatives to JBL HDI-3800:
- KEF Blade Two Meta vs JBL HDI-3800
- JBL HDI-3800 vs MoFi SourcePoint V10 Master Edition
- MoFi SourcePoint 888 vs JBL HDI-3800
- JBL HDI-3800 vs Revel F328Be
- Ascend Acoustics ELX Ribbon Tower vs JBL HDI-3800
Prices on this page were last checked September 30, 2026 at 2:57 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.
As an eBay Partner, we may be compensated if you make a purchase.
The Two Speakers In Full
JBL HDI-3800: $5,000.00 per pair Discontinued eBay
Pros: 2410H-2 1” Teonex compression driver matched to a custom High-Definition Imaging (HDI) horn geometry achieves exceptional horizontal directivity control, high output capability, and effortless transient response. Triple 8” Advanced Aluminum Matrix woofers deliver deep, authoritative bass extension down to an F3 of 37Hz and F10 of 28Hz with minimal low-frequency compression. Outstanding sensitivity (92dB SPL at 2.83V/1m) and ultra-low THD/multitone distortion allow extremely high undistorted SPL output in large home theater spaces. Measured bass extension of 37Hz (-3dB), with a measured sensitivity of 92dB.
Cons: On-axis frequency response features a narrow upper-frequency elevation around 8-10kHz, performing noticeably smoother when toed out 10-20° off-axis. Vertical directivity handoff across the triple woofer layout creates vertical soundstage height tilt depending on listening distance and ear height. Minimum impedance dips to 3.8 ohms, requiring high-current amplifier stability. Substantial cabinet dimensions and 38kg weight require significant room real estate. Discontinued.
Full JBL HDI-3800 review and specifications →
| Bass Extension (-10dB) | 28Hz (measured, Erin’s Audio Corner) |
|---|---|
| Bass Extension (-3dB) | 37Hz (measured, Erin’s Audio Corner) |
| DIY Kit | No |
| Dimensions | 43.3”H x 11.8”W x 16.4”D (1100.5 x 300.0 x 417.8 mm) |
| Drivers | 1 in. 2410H-2 Teonex compression driver with HDI horn, triple 8 in. Advanced Aluminum Matrix cone woofers |
| Impedance | 4 ohms nominal (3.8 ohms minimum, measured by Erin’s Audio Corner) |
| Sensitivity | 92dB (measured average, Erin’s Audio Corner) |
| Spinorama Preference Score | 5.62 |
| Spinorama Preference Score with Perfect Sub | 7.03 |
| Weight | 83.8 lbs (38.0 kg) each |
| Woofer Cabinet | ported, rear |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
Magnepan LRS+: $1300 per pair Magnepan eBay
Pros: Thin, two-way planar-magnetic open-baffle/dipole panel design (about 48” tall, just 1” deep). Delivers a uniquely dramatic and enveloping soundstage with genuinely three-dimensional depth effects that work across all music genres, not just classical or orchestral material as commonly assumed. Extremely tight, locked-in center-phantom imaging when set up correctly. Open-baffle design avoids the “boxy” enclosure coloration of conventional cabinet speakers. Multitone distortion is remarkably consistent from low to high frequency, a characteristic the reviewer hasn’t observed in conventional cone-and-dome speakers. Compression at high output stays modest (about 0.5-1dB) through the midrange and treble, giving roughly 20-26dB of usable dynamic range in that region. At its price, a strong contender for a dedicated secondary listening room, even if not a main-system replacement. Measured bass extension of 74Hz (-3dB), with a measured sensitivity of 85.1dB.
Cons: Extremely current-hungry and power-hungry: even a pair of 600W Macintosh monoblock amplifiers only averaged about 90dB output. A robust, high-power amplifier is essentially mandatory, and budget amps won’t cut it. Bass rolls off very quickly (F3 74Hz, F10 67Hz, described as falling off “like a rock”), making a subwoofer an absolute requirement for any low-end content. A roughly 3dB dip in the mid-bass (100-300Hz) region thins out vocal body and fullness compared to a conventional bookshelf speaker. A resonance/bump around 400Hz adds a mild boxy quality, though it responds well to about 2dB of EQ correction. Extraordinarily fussy about exact positioning: both seating height (must align with the acoustic reference point between the panel’s lower tie-down points) and horizontal aiming are unusually critical; moving just a couple of inches can cause treble content above roughly 500-600Hz to nearly vanish. Distinct off-axis cancellation zones exist directly to the sides of the panel, where very little sound is audible at all. Fails badly under extreme dynamic-transient testing in the bass, and the reviewer blew fuses pushing the speaker during testing: not built for high-volume or highly dynamic playback. A genuinely different category from conventional hi-fi speakers, requiring more setup patience and experimentation than a typical monopole design.
Full Magnepan LRS+ review and specifications →
| Bass Extension (-10dB) | 67Hz (measured, Erin’s Audio Corner) |
|---|---|
| Bass Extension (-3dB) | 74Hz (measured, Erin’s Audio Corner) |
| DIY Kit | No |
| Dimensions | 48”H x 13.5”W x 1”D (1219.2 x 342.9 x 25.4 mm) |
| Drivers | Full-range planar magnetic dipole panel (48” tall x 13.5” wide); quasi-ribbon design, two-way with separate mid/bass and tweeter ribbon sections |
| Impedance | 4 ohms nominal, 3 ohms minimum (measured, Erin’s Audio Corner) |
| Sensitivity | 85.1dB (measured, Erin’s Audio Corner) |
| Spinorama Preference Score | 1.27 |
| Spinorama Preference Score with Perfect Sub | 4.32 |
| Weight | 30 lbs (13.6 kg) |
| Woofer Cabinet | open baffle |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons