ELAC BS 312 Bookshelf 2-way Speaker (Pair – White High Gloss)

The ultimate ELAC classic.

No one could have predicted its subsequent success back in 1993, when a small loudspeaker called the ELAC Elegant 305 hinted at the promise of great things to come. Aesthetics and sound in perfect unity—the secret is aluminum. It guarantees high rigidity from low material thicknesses and makes a unique cabinet shape possible. The near-complete absence of a front baffle allows the sound to radiate with total freedom. The audible result is room-filling, unfettered and utterly captivating sound.

A compact 2-way, bass-reflex design, the BS 312 incorporates the multi-award-winning JET 5 tweeter and a new woofer specially developed to ensure that electric signals are flawlessly converted into a superlative audio experience. This perfect partnership endows the BS 312 with unprecedented precision and dynamics in any position.

Speaker type: 2-way, bass reflex
Tweeter: 1 x JET 5
Woofer: 1 x 115 mm AS -XR cone
Crossover frequency: 3,200 Hz
Frequency response: 42 to 50,000 Hz
Sensitivity: 87 dB at 2.83 v/1m
Recommended amplifier power: 50 to 150 wpc
Nominal/peak power handling: 70 / 100 wpc
Nominal impedance: 4 Ω; minimum 3.4 Ω @ 280 Hz
Binding posts: 5-way metal
Magnetic shielding: No
Cabinet finish: High gloss black or white
Accessories included: Metal grille
Height: 8.2 in / 208 mm
Width: 4.8 in / 123 mm
Depth: 11.1in / 282 mm
Net weight (each): 15.9 lb / 7.2 kg

Be amazed by the volume these compact loudspeakers can produce. Both models in the Line 300 deliver an extraordinary audio experience for their size, thanks in part to aluminum cabinets that are rigid, lightweight and allow for a narrow profile that minimizes the diffraction effects of larger cabinets.

The eye-catching surface of the crystal membrane is more than just an attractive design feature of the BS 312. The Crystal Membrane (patent pending) design is based on ELAC’s Aluminum-Sandwich AS Technology. The crystal-shaped inverse aluminum dome is joined to the paper cone in a special gluing process to result in the desired sandwich construction. Resembling the surface of a large crystal, the aluminum-foil stamping stiffens the aluminum dome, diminishing resonances and minimizing coloration, while improving power handling and dynamics. The voice coil design of the driver results in an expanded frequency range, and driver surround allows for longer cone excursions for truly prodigious volume and lowest distortion, a unique engineering achievement for a driver of its size.

Delivering true high-definition sound, ELAC’s JET 5 tweeter used in the BS 312 enthralls with its lightning-fast response and wide dynamic range, offering minimal distortion, lots of headroom and a distinctly wider frequency range than conventional dome tweeters. The ELAC JET tweeter is one of the most legendary tweeters in the industry and has won international praise with its transparent and effortless sound image.

The JET tweeter was developed to perfection on the basis of the famous Air Motion Transformer by loudspeaker pioneer Dr. Oskar Heil. Its operating principle is based on a concertinaed-foil membrane, driven by a strong magnet system of neodymium rods. This motor drives the air considerably faster than the pistonic motion of a conventional driver, with gains in higher sensitivity and extraordinary dynamics. Due to many additional design changes, like an improved new neodymium magnet system, even higher efficiency, higher sound pressure levels and frequency response up to 50 kHz was achieved.

The core of the JET tweeter is the folded foil membrane. With a fold width of only 0.84 mm, a major requirement in the JET production is precision. To guarantee repeated accuracy and unchanging quality even with high production capacity, gluing and handling are now executed by two SCARA robots. The folding and fixing of the membrane, however, are executed by hand, since for production steps requiring extreme precision, the manual dexterity of skilled technicians is irreplaceable. Due to continuous improvement, the JET 5 tweeter creates an effortless, airy and resonance-free image up to 50,000 Hz, and with its linear frequency response is ideally suited for the reproduction of DVD-A and SACD.

The bass port of the BS 312 is a proprietary design feature. Flared on both sides, the double-flare port has been designed to minimize ventilation noises and to reduce friction losses of traditional ported cabinets.

The sound of loudspeakers is heavily influenced by room-acoustics. In some cases the room shape and especially the furnishings offer less than ideal conditions for the optimum set-up of the loudspeakers, sometimes resulting in bass reproduction that is too strong. Closing the bass reflex port of the BS 312 compensates for unfavorable acoustic conditions when speakers are installed, for example, close to a wall. When loudspeakers are used close to walls or in small rooms and the bass is too prominent, the ELAC Bass Control plug can be used to improve the bass reproduction by reducing the low frequency output. Just insert one or both of the supplied ELAC Bass Control plugs into the bass port until the bass is at the correct level relative to the midrange and treble.

With the cinema-friendly BS 302, you can watch television without having distorted color. Thanks to magnetic shielding, this loudspeaker can be installed right next to CRT screens or devices with hard drives sensitive to magnets without creating interference.

Woven Kevlar    
Crossover Tuning    
Nautilus Tapering Tube    
Flowport    
Technical features     Nautilus™ tube loaded aluminium dome tweeter

Kevlar® brand fibre cone bass / midrange

Flowport™
Description     2-way vented-box system
Drive units     1x ø25mm (1 in) aluminium dome high-frequency

1x ø130mm (5 in) woven Kevlar® cone bass / midrange
Frequency range     -6dB at 45Hz and 50kHz
Frequency response     55Hz - 22kHz ±3dB on reference axis
Dispersion     Within 2dB of reference response
Horizontal:     over 60º arc
Vertical:     over 10º arc
Sensitivity     84dB spl (2.83V, 1m)
Harmonic distortion     2nd and 3rd harmonics (90dB, 1m)

High Performance, Compact Size, Surprising Price

Don't settle for flat sound from your flat panel TV, and don't miss out on the excitement of digital surround-sound in your shows, movies and games. Great surround-sound doesn't have to take up a lot of space or cost all that much. The payback is family fun and entertainment excitement. Don't miss out.

TL1 Features:

• The silk dome tweeter delivers a classic, clear, detailed Polk performance, with pinpoint imaging and smooth highs that are never tiring.

• Time Lens® technology aligns the acoustic centers of the tweeter and mid-bass driver on the same spatial plane for superior imaging, while an acoustic lens incorporated in the grille smoothes the tweeter's frequency response.
• The unique curved enclosure design employs non-parallel surfaces to strengthen the acoustically inert enclosure and deliver less audible coloration from internal surface resonances.
• Because of its Extended Linear Motion motor structure, the moving parts of the drivers used in the Blackstone TL Series can move farther, more smoothly, in a smaller space than any other speaker driver in an enclosure this size, achieving the kind of dynamic response (clarity, volume) you'd expect from much larger speakers.
• An aperiodic-tuned rear-firing bass port combines the extension of a ported enclosure with the smoother low-end of an acoustic suspension enclosure, controlling port air flow for the kind of big bass response, and perfect speaker-subwoofer blending, you'd never expect from a loudspeaker you can hold in the palm of your hand.
• The Blackstone aerated polypropylene cone is lightweight, but stiff and strong, with longer linear excursion capabilities in a limited compact enclosure space, so it plays louder with less distortion.
• A super-small long-throw mid-bass driver, tuned with our patented Dynamic Balance® technology, delivers astonishingly smooth, flat frequency response, superior transparency and detail, and the surprising ability to play really, really loud for such a small speaker.
• Polk's proprietary, patented Dynamic Balance technology allows our engineers to design out distortion-causing driver and system resonances, so you only hear the good sounds.
• Hi-Gloss "Blackstone" finish, a durable, deep automotive-strength finish that matches today's most stylish flat-panel TVs and furniture.
• Compact means go-anywhere for Blackstone TL: on shelves, on the wall, on stands. Built-in keyhole slots and threaded inserts (that fit virtually any brackets) give you multiple mounting options.
• Gold-plated, professional-style 5-way binding posts, for the most secure connection options.
• All models in the Blackstone TL Series are available in convenient, professionally matched 5-packs for instant home theater solutions in any room. There are two complete systems available that include a subwoofer; everything you need for an explosive, compact, easy-to-connect home theater system. Plus, you can use individually-available satellites to expand your systems to accommodate 6.1, 7.1 and beyond.

Driver Complements
Mid/Woofer     1 - 2 1/2" Diameter (6.35cm)
Dynamic Balance composite cone driver
Tweeter     1 - 1/2" Diameter (1.27cm)
Silk polymer dome
Electrical
Overall Frequency Response     120Hz-22kHz
Lower -3dB Limit     135HZ dB
Upper -3dB Limit     20kHz dB
Nominal Impedance     8 ohms
Recommended Amplifier Power     10-100 w/channel
Efficiency     89 dB
Inputs     5-way binding posts
Dimensions
Cabinet Size     6 1/2" H x 3 3/4" W x 4 7/8" D
(16.51cm H x 9.53cm W x 12.38cm D)
Mounting Options     keyhole slot; .25 x 20 threaded insert
Enclosure Type     Non-resonant composite w/time-aligned geometry and aperiodic tuned port
Shipping/Other
Product Weight     1.85 lbs. (0.84kgs)
Shipping unit:     each
Total Shipping Weight     2.40 lbs. (1.09kgs)
Speaker Warranty     5 years parts and labor (original purchaser)

• Time Lens Technology-The acoustic centers of the tweeter and mid-bass driver are located in the same plane for superior imaging
• PowerPort® a patented Polk technology, extends the low frequency mid-bass driver response as it decreases air turbulence, and eliminates "port noise" and bass output losses up to 3 dB.
• 3/4" Silk Dome Tweeters for crisp, clear imaging and smooth response that's never tiring.
• 3 1/4" Composite Injection Molded Cones With Dynamic Balance Driver Technology
• Combination Keyhole Slot & 1/4" x 20 Threaded Insert fits all aftermarket ceiling and wall brackets for ultimate flexibility
• Time Lens Technology-The acoustic centers of the tweeter and mid-bass driver are located in the same plane for superior imaging
• PowerPort a patented Polk technology, extends the low frequency mid-bass driver response as it decreases air turbulence, eliminates "port noise" and bass output losses up to 3 dB.

• 3/4" Silk Dome Tweeters for crisp, clear imaging and smooth response that's never tiring.
• 3 1/4" Composite Injection Molded Cones With Dynamic Balance Driver Technology
• Combination Keyhole Slot & 1/4" x 20 Threaded Insert fits all aftermarket ceiling and wall brackets for ultimate flexibility.

Driver Complements
Mid/Woofer     1 - 3 1/4" Diameter (8.26cm)
Dynamic Balance composite cone driver
Tweeter     1 - 3/4" Diameter (1.91cm)
silk dome
Electrical
Overall Frequency Response     95Hz-24kHz
Lower -3dB Limit     125 Hz dB
Upper -3dB Limit     20kHz dB
Nominal Impedance     8 ohms
Recommended Amplifier Power     10-125 w/channel
Efficiency     89 dB
Inputs     Gold-plated 5-way binding posts
Dimensions
Cabinet Size     7 1/8" H x 4 1/8" W x 5 3/16" D
(18.10cm H x 10.48cm W x 13.18cm D)
Mounting Options     keyhole slot; .25 x 20 threaded insert
Enclosure Type     Steel-plate reinforced curved enclosure with time-aligned driver geometry and PowerPort bass venting
Shipping/Other
Product Weight     3.00 lbs. (1.36kgs)
Shipping unit:     each
Total Shipping Weight     3.70 lbs. (1.68kgs)
Speaker Warranty     5 years parts and labor (original purchaser)

ΔΙΑΤΙΘΕΤΑΙ ΚΑΙ ΣΕ ΑΣΠΡΟ ΧΡΩΜΑ

System Format:    2 Way
Frequency Response:    42 Hz - 60 kHz
Sensitivity (1W@1M):    88 dB
Nominal Impedance:    8 ohms
Maximum S.P.L
(Per pair in room):    112.6 dBA
Power Handling (RMS):    120 W
Recommended Amplifier Requirements (RMS):    60 - 120 W
Bass Alignment:    Bass reflex. HiVe port system
Crossover Frequency:    2.7 kHz
Drive Unit Compliment:    1 x 6.5" RST bass/mid-range driver
1 x C-CAM H.F ribbon transducer
External Dimensions excl Stand (H x W x D)

362 x 210 x 303 mm
(14 3/8 x 8 1/4 x 11 15/16 inch)
Weight (each) Excluding stands:    9.9 Kg (21.75 lbs)

System Format: 2 Way
Frequency Response: 42 Hz - 60 kHz
Sensitivity (1W@1M): 88 dB
Nominal Impedance: 8 ohms
Maximum S.P.L
(Per pair in room): 112.6 dBA
Power Handling (RMS): 120 W
Recommended Amplifier Requirements (RMS): 60 - 120 W
Bass Alignment: Bass reflex. HiVe port system
Crossover Frequency: 2.7 kHz
Drive Unit Compliment: 1 x 6.5" RST bass/mid-range driver
1 x C-CAM H.F ribbon transducer
External Dimensions excl Stand (H x W x D)

362 x 210 x 303 mm
(14 3/8 x 8 1/4 x 11 15/16 inch)
Weight (each) Excluding stands: 9.9 Kg (21.75 lbs)

AVAILABLE IN SIX COLOR FINISHES