Item #JBLSUMK2BG

JBL Summit K2

3-Way Floorstanding Loudspeaker - Black - Each
Item #JBLSUMK2BG

JBL Summit K2

3-Way Floorstanding Loudspeaker - Black - Each
$49,999.95
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Overview

The JBL Summit K2 is a 3-way floor-standing reference loudspeaker engineered for exceptional clarity, dynamics, and full-range performance. Its advanced HDI horn system, Differential Drive mid-bass and woofer drivers, MultiCap crossover, and IsoAcoustics isolation feet combine with a luxurious, heavily braced enclosure for precise, powerful sound.

Newly Designed Complement of Speaker Drivers

Summit K2 features a newly engineered mid/high-frequency system that combines the output of three patented JBL D2815 1.5-inch (38mm) dual-diaphragm, dual-motor compression drivers with a custom-designed, patent-pending 3-into-1 expansion manifold, precisely mated to a custom large-format Sonoglass High-Definition Imaging (HDI) horn. This mid/high-frequency system delivers exceptional detail and clarity across a wide frequency bandwidth, extending from the 1,080Hz crossover point of the dynamic drivers to beyond the reaches of human hearing.

Anchoring the sound foundation of Summit K2 is a 10-inch (250mm) cast-frame Differential Drive mid-bass driver and a 15-inch (380mm) cast-frame Differential Drive woofer. Both dynamic drivers employ JBL’s triple-layer Hybrid Carbon Cellulose Composite Cone (HC4), constructed from a proprietary formula of carbon-fiber and pure-pulp front and rear skins sandwiching a closed-cell foam core. This advanced cone architecture provides optimal stiffness, overall mass, and structural integrity required for high output, low distortion, and exceptional power handling.

JBL MultiCap Crossover

Controlling signal distribution within Summit K2 is an advanced MultiCap crossover network that supports single-wire, bi-amp/bi-wire, and tri-amp/tri-wire connectivity.

By replacing traditional large capacitors with a greater number of smaller capacitors, this network reduces ESR (Electro-Static Resistance) and minimizes energy loss due to mechanical movement. The result is greater signal transfer to the drivers, increased power handling, enhanced dynamic expression, ultra-low distortion, and exceptional overall clarity.

Crafted from Luxurious Materials

All drivers and crossover components are housed within a meticulously engineered and beautifully finished enclosure featuring internally offset, multi-braced, and damped pre-stressed pressed curved-wall construction designed to minimize internal standing waves. Summit K2 cabinetry is offered in a choice of high-gloss painted black with Summit platinum accents or high-gloss ebony wood veneer with Summit gold accents.

Grounding Summit K2 is a set of custom-designed JBL | IsoAcoustics isolation feet that counteract the vibrational forces generated by the drivers, effectively decoupling the loudspeaker from the supporting surface. This isolation contributes to tighter bass performance, a more expansive soundstage, and imaging defined by greater clarity and spatial precision.

Highlights

  • 3x patented D2815 1.5-inch (38mm) Dual-diaphragm, Dual-motor High-frequency Compression Drivers
  • Patent-pending Constant Expansion Rate / Phase Coherent 3-into-1 manifold
  • Patented custom High-Definition Imaging (HDI) Sonoglass High-frequency Horn
  • 10-inch (250mm) Cast-frame, Differential Drive, Triple-layer Hybrid Carbon Cellulose Composite Cone (HC4) Mid-bass
  • 15-inch (380mm) Cast-frame, Differential Drive, Triple-layer Hybrid Carbon Cellulose Composite Cone (HC4) Woofer
  • MultiCap Crossover Network with Single-wire, Bi-amp/Bi-wire, and Tri-amp/Tri-wire Connectivity
  • Finely Crafted and Beautifully Detailed Enclosure with Carbon Fiber Baffle Trim
  • Soft-curved Cabinet Walls with Heavily Braced and Dampened Construction
  • JBL | IsoAcoustics Adjustable Acoustic Isolation Feet
  • Luxurious High Gloss Finishes with Summit Platinum or Summit Gold detailing

Details & Specs

ModelJBL Summit K2
Description3-Way, 15-inch (380mm) Floor-standing Reference Loudspeaker
High Frequency ControlHigh-definition imaging (HDI) Sonoglass acoustic horn
High Frequency TransducerTriple, D2815; Dual 1.5-inch (38mm) annular ring Teonex diaphragms, Dual-motor D2 compression drivers mounted to a 3-into-1 manifold mated to the High-Definition Imaging (HDI) horn
Mid-Bass Frequency TransducerJMW250SC 10-inch (250mm), Triple-layer Hybrid Carbon Cellulose Composite Cone (HC4) with dual-inverted spiders, a 3-inch differential drive, dual voice coil motor, cast aluminum frame, and treated-cloth reverse progressive accordion-edge surround
Low Frequency TransducerJW380SC 15-inch (380mm), Triple-layer Hybrid Carbon Cellulose Composite Cone (HC4) with dual inverted spiders fore and aft of the motor, a 4-inch differential drive, dual voice coil motor, cast aluminum frame, and half-forward-roll surround
Recommended Amplifier Power (RMS)25-600 Watts RMS
Frequency Response (-6dB on-axis, anechoic)24.6 Hz - 23.5 kHz
Frequency Response (-10dB on-axis, anechoic)18.2 Hz - 26.5 kHz
Sensitivity (2.83V@1m)92 dB
Maximum SPL118.8 dB (calculated)
Acoustic Center Height (centered, from floor)39.56" (1005mm)
Impedance (Nominal / Minimum)4 Ohms / 3.27 Ohms (@86.8 Hz)
Crossover Frequency(s) / Type / Slope270Hz, 1080 Hz/Full MultiCap/Acoustically symmetric 3rd and 4th order, 3-way crossover
Internal WiringOhno-Continuous-Cast (OCC) Long-crystal Oxygen-free Silver-plated Copper Wire
ControlsTri-amp / Tri-wire capable with 3-pairs of binding posts
Input TypeRhodium-plated, Silver-coated, Oxygen-free, Pure Copper Core Binding Posts with a Chrome-plated Brass Carbon-fiber wrapped shell and Nylon / Glass-fiber insulators (3 pairs)
Enclosure TypeInternally offset multi-braced & damped pre-stressed pressed curved-walls made from sustainably-sourced engineered wood with multi-component lining
Enclosure TuningDual rear flared bass ports
Enclosure Finish OptionsBlack High Gloss (BG)
Macassar Ebony Wood Veneer with High Gloss (EG)
Net Dimensions with grille (HxWxD)50.4" x 25.0" x 18.1" (1280.2mm x 635.3mm x 458.7mm)
Net Weight (Speaker + Grille)239.0 lbs. (108.4kg)
Shipping Dimensions (HxWxD)59.8" x 35.4" x 37.4" (1,520.0mm x 900.0mm x 950.0mm)
Shipping Weight454.2 lbs. (206kg)
Packed As (Each / Pair)Each

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