Atlantic Technology 8600eLR vs Børresen X3

Short answer: the Atlantic Technology 8600eLR. It ranks #65 of 73 floorstanding speakers by sound quality, rated 3.1/5, at $5,700; the Børresen X3 ranks #67, rated 3.0/5, and costs $11,000, which makes this an easy call rather than a real tradeoff.

The case for the Atlantic Technology 8600eLR: A sealed high-output flagship tower with four 8-inch woofers, dual 5.25-inch midranges, 91dB sensitivity and boundary/HF adjustment controls. The tradeoff: The raw preference score is only 2.65, making a subwoofer and correction essential despite the massive cabinet.

What the Børresen X3 does well: A 2.5-way tower built around a planar ribbon tweeter, a 4.5” mid-range driver, and dual 4.5” bass drivers, spec’d at 88dB/1W sensitivity into a 4-ohm nominal load (measured minimum impedance stays a friendly 6.1 ohms above 80Hz, so it doesn’t actually need much power despite the sub-90dB rating). The catch: A significant midrange suckout centered around 200-300Hz measures 8-11dB below the mean SPL, creating an audible hole in the mid-range that multiple independent listeners also flagged unprompted.

Buy the Atlantic Technology 8600eLR. It is rated higher for sound quality than the Børresen X3 and costs less, which makes it the one to get unless you need something the other one does better.

Still deciding? The full Passive Home rankings cover every ranked option.

Specifications Side By Side

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How Atlantic Technology 8600eLR compares with other leading options:

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Prices on this page were last checked September 29, 2026 at 3:43 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

Atlantic Technology 8600eLR: $5,700 per pair Atlantic Technology eBay

Pros: A sealed high-output flagship tower with four 8-inch woofers, dual 5.25-inch midranges, 91dB sensitivity and boundary/HF adjustment controls. The local snapshot measures 58Hz extension and scores 5.26 with a subwoofer. Measured bass extension of 68.8Hz (-3dB).

Cons: The raw preference score is only 2.65, making a subwoofer and correction essential despite the massive cabinet. Each tower weighs over 90 pounds, and value is weak if two-channel neutrality is the main goal.

Full Atlantic Technology 8600eLR review and specifications →

Bass Extension (-3dB)	68.8Hz (measured, Erin’s Audio Corner via spinorama.org)
DIY Kit	No
Dimensions	51.7H x 10.9W x 11.4D in
Drivers	1-inch aluminum-magnesium tweeter, dual 5.25-inch midranges, four 8-inch woofers
Enclosure	Sealed 3-way floorstander
Frequency Response	50Hz-25kHz +/-2dB
Impedance	6 ohms
Sensitivity	91dB
Spinorama Preference Score	2.65
Spinorama Preference Score with Perfect Sub	5.26
Weight	93.3 lbs (42.3 kg) each

• Links
  • Atlantic Technology 8600eLR Official Page
• Reviews, Comparisons and Sound Samples
  • Atlantic 8600eLR Measurements (spinorama.org)
• Head-to-Head Comparisons
  • Atlantic Technology 8600eLR vs Dali Rubikore 6
  • Atlantic Technology 8600eLR vs Klipsch Heresy IV
  • Atlantic Technology 8600eLR vs Focal Aria Evo X N°2
  • Atlantic Technology 8600eLR vs Klipsch Forte IV

Børresen X3: $11,000.00 per pair eBay

Pros: A 2.5-way tower built around a planar ribbon tweeter, a 4.5” mid-range driver, and dual 4.5” bass drivers, spec’d at 88dB/1W sensitivity into a 4-ohm nominal load (measured minimum impedance stays a friendly 6.1 ohms above 80Hz, so it doesn’t actually need much power despite the sub-90dB rating). Very wide, remarkably consistent horizontal directivity around ±70° gives an expansive, enveloping soundstage, helped by the reviewer’s pair measuring essentially identically to each other for tight image precision. A pronounced high-Q bass shelf centered around 80Hz (roughly 8dB above the mean level) delivers a punchy, attention-grabbing low-end thump at moderate volumes. Harmonic distortion is clean through the midrange at 86dB, and multitone distortion stays under about 3% even though the low end is handled by relatively small 4.5” drivers rather than something larger. Detailed, extended high frequencies when seated on the tweeter’s intended axis. Measured bass extension of 50Hz (-3dB).

Cons: A significant midrange suckout centered around 200-300Hz measures 8-11dB below the mean SPL, creating an audible hole in the mid-range that multiple independent listeners also flagged unprompted. The 80Hz bass shelf comes with the worst low-frequency ringing the reviewer says he has measured to date on a waterfall plot: it lingers well after the surrounding frequencies have decayed, giving kick drum and bass notes a boomy, one-note quality. Significant dynamic compression sets in as volume rises: bass output near 90Hz drops only about 1.5dB at 86dB SPL, but the loss grows substantially by 96dB and 102dB (around 26dB of total dynamic range), so the appealing bass punch measurably fades at higher listening levels. The upper-midrange and lower treble (2-4kHz) read soft and recessed unless the listener sits almost exactly on the tweeter’s reference axis, within about 15°: the manufacturer’s recommended setup (tweeter aimed above ear height, per their design intent) makes this worse rather than better for a seated listener at normal height. A crossover-related directivity kink between the tweeter and mid-range driver, visible in the vertical response, trades some pinpoint image precision for a more diffuse sense of envelopment compared to smaller two-way designs. Resonances appear in the impedance curve near 300Hz and 2kHz, coinciding with the measured midrange dip.

Full Børresen X3 review and specifications →

Bass Extension (-10dB)	25Hz (measured, Erin’s Audio Corner)
Bass Extension (-3dB)	50Hz (measured, Erin’s Audio Corner)
Country	Denmark
DIY Kit	No
Dimensions	50.8”H x 13.6”W x 23.9”D (1290.0 x 345.0 x 607.0 mm)
Drivers	Planar ribbon tweeter, 4.5” mid-range driver, dual 4.5” bass drivers
Frequency Response	35Hz - 50kHz (Manufacturer specified)
Impedance	4 ohms
Recommended Power	50W minimum
Sensitivity	88dB
Spinorama Preference Score	2.38
Spinorama Preference Score with Perfect Sub	3.50
Weight	121.3 lbs (55 kg)

• Links
  • Official Børresen X3 Website
• Reviews, Comparisons and Sound Samples
  • Erin’s Audio Corner: The Hidden Secrets of BØRRESEN X3 SPEAKER Audiophiles Need to Know More from Erin’s Audio Corner →
  • Erin’s Audio Corner Measurements (spinorama.org)
• Head-to-Head Comparisons
  • Børresen X3 vs Dali Rubikore 6
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