The vast majority of speakers – expensive as well as cheap – have modestly-sized woofers. This is because the front baffle must be narrow in order to minimise sound waves colliding across the baffle, before being radiated into the room – distorted and time-shifted. If you want to experience timing and stereo perspective, then the baffle must therefore be narrow. If you want to push a lot of air, you must therefore have several small bass elements instead of one large one. If you want a large cabinet volume, the cabinets must for the same reason be deep instead of wide. That is the message of a lot of speaker designers.

The tweeter horn, which actually contains two 1.5-inch compression elements on top of each other, has three functions: First, it handles much higher sound pressure than a standard dome tweeter. In addition, it is easier to control the dispersity of a treble horn, so that more of the energy reaches the sofa, without first being reflected from side walls, floors and ceilings. It provides better timing, and that the room has less influence on the final sound.

And finally, do you remember what I said about diffractions from a large faceplate? Well, here the horn goes almost to the edges of the cabinet, so there is really no front plate to speak of. And since it is mainly in the treble frequencies that one has problems with diffraction, the problem is thereby solved.

By the way, the treble horn on the JBL 4349 has a special shape, which acts as a waveguide for the high frequencies. This minimizes the distortion you normally associate with horns, so you avoid the sharp bell sound.

Specifications

Type: 2-way bass reflex

Frequency range: 32-25,000 Hz (-6 dB)

Sensitivity: 91 dB / 8 ohms

Treble: 1.5 ″ Teonex compression driver in fiberglass-treated horn

Bass: 12″ Pure Pulp cellulose (paper)

Mål: 73,7 cm x 44,5 cm x 34,3 cm (H x B x D)

Finish: Satin walnut or black walnut veneer

Project everest DD65000 Introducing the Project Everest DD65000, an evolution of  the much-lauded DD66000 speaker system. Using the most advanced technologies and world-class components, our engineers have created one of the world’s most sophisticated and sought-after speaker systems. Building off the much-lauded JBL® Project Everest DD66000, the DD65000 three-way loudspeaker system features dual 15-inch (380-millimeter) layered paper-pulp matrix cone woofers, which deliver controlled, articulate and authoritative bass response without compromising sonic neutrality. High and midrange frequencies cleanly 

come through its 4-inch (100-millimeter) magnesium-alloy  compression driver. And its 1-inch (25-millimeter) ultrahigh frequency driver delivers frequencies up to 50kHz – far  above the range of human hearing. Finished in luxurious  zebra-wood, the Everest DD65000 stays true to our rich heritage in designing the world’s best home theater  equipment. In short, this is one of the finest home theater  systems we’ve ever produced

Highlights

 • Dual 15" (380mm), layered-paper, pulp-cone woofers for 

authoritative bass response

 • 4" (100mm), magnesium-alloy diaphragm for crystal

clear highs

 • 1" (25mm) high-purity, magnesium-alloy diaphragm for 

extreme highs

 • Extremely smooth and wide frequency response

 • Proprietary Bi-Radial® horns

 • 100 – 500 watts suggested amplifier power range

 • Excellent terminals and system controls

 • Bi-wiring capabilities

 • Flawless enclosure construction

 Specifications

 • Speaker type: Three-way floorstanding 

• Low-frequency transducer: Dual 15" (380mm) layered paper/

 pulp matrix cone woofers 

• High-frequency transducer: 4" (100mm) magnesium-alloy 

compression driver

 • Ultrahigh-frequency transducer: 1" (25mm) magnesium-alloy 

compression driver

 • Maximum recommended amplifier power: 500 watts

 • Frequency response (–6dB):  

31Hz – 50kHz (half space); 

40Hz – 50kHz (anechoic)

 • Nominal impedance: 8 ohms 

5.0 ohms @ 80Hz 

3.8 ohms @ 40kHz

 • Sensitivity: 96dB (2.83V/1m)

 • Horn directivity (horizontal x vertical): 

High-frequency: 100º x 60º 

Ultrahigh-frequency: 60º x 30º

 • Crossover frequencies:  

150Hz (LF1 6dB/octave) 

750Hz (LF2 24dB/octave) 

20kHz (UHF 24dB/octave)

 • Control functions: 

HF level control (low, mid, high) 

LF level control (low, mid, high) 

LF/HF drive mode bars (normal/bi-amp) 

System orientation bars (left/right)

 • Dimensions (H x W x D): 38" x 43-5/8" x 18-1/2"  

(965mm x 1109 x 469mm)

 • Weight: 302 lb. (137kg) without grille 

312 lb. (142kg) with grille

 • Package weight: 383 lb. (174kg