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ELAC FS 248 Black Edition

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ELAC FS 249
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ELAC 240 Black Edition tweeter detail
  • TT150AS-XR: difuzoare bass cu membrane sandwich hartie-aluminiu "Crystal"
  • MT140AS-XR: difuzor medii cu membrana sandwich hartie-aluminiu "Crystal"
  • Suspensie din material textil impregnat "full-roll" pentru difuzorul de medii
  • JET III: tweeter cu tehnologie Air-Motion-Transformer (folded foil) Black Edition
  • DC ring (JET Dispersion Control): inel pentru controlul dispersiei ce se monteaza in jurul tweeterului JET

FS 248 Black Edition: a speaker taken from the New York City skyline at night

Like part of the New York skyline at night: Tall, dark and slender. This speaker is ELAC's skyscraper, both visually and acoustically.

Specifications
Dimensions H × W × D
1,173 ×170 × 308 mm Details
Weight
24,3 kg
Principle
3½-ways, bass reflex
Woofers
Bass Ports
3 × 150 mm AS-XR cone (mag. shielded)
1 × 60 mm (with Bass Control Plug)
1 × 100 mm (down firing)
Midrange
1 × 140 mm AS-XR cone
Tweeter
1 × JET III (mag. shielded)
Recom. Amplifier Power
at Nominal Impedance
30-300 W / channel
Crossover Frequencies
180 / 450 / 2,900 Hz
Sensitivity
89.5 dB / 2.83 V / 1 m
Nominal Impedance
suitable for amplifiers (from ... to)
4 Ω
4 ... 8 Ω
Minimum Impedance
3.9 Ω at 110 Hz
Frequency Range
acc. to IEC 268-5
30 ··· 50,000 Hz
Nominal / Peak Power Handling
150 / 220 W
Finishes
black high gloss
ELAC FS 248 Black Edition brochure

Treble Unit

ELAC FS 248 Black Edition JET III tweeter

The ELAC JET tweeter is one of the most legendary tweeters in the hi-fi trade and has won international renown with its unusual transparent and effortless sound image.

The JET tweeter was delveloped to perfection on the basis of the famous 'Air Motion Transformer' by loudpseaker pioneer Dr Oskar Heil. Its principle: a concertinaed foil membrane is driven by a strong magnet system of neodymium rods.

This 'motor' drives the air considerably faster than the conventional pistonic technique. High sensitivity and extraordiary dynamics are the result. Due to continuous improvement, the JET III tweeter creates an effortless and airy resonance-free image up to 50,000 Hz, and with its linear frequency response is ideally suited for the reproduction of Hi-Res Audio music.

Note: The loudspeakers of the 240 BE Series are supplied with the JET Dispersion Control as an accessory. The ELAC "JET Dispersion Control DC" is a flat ring made of open-cell rubber foam which is mounted around the JET orifice with four clasps (or with adhesive tape). The JET DC results in a broadband reduction of about 0.5 dB of the radiated sound level nearly independent of frequency. The JET DC is best suited for rooms with little sound absorption at high frequencies, especially for rooms with large windows without curtains or with a smooth floor without a carpet.

Midrange Unit

MT 140 AS-XR black anodized diaphragm midrange used in FS 248 BE and FS 249 BE.

The midrange driver of the 240 Black Edition Series contains the new "Crystal Membrane" (patent pending) and their design is based on the well-known "Aluminium-Sandwich AS Technology" which avoids noticeable resonances in the diaphragm.The "Full-Roll" fabric surrounding expands the transmission range up to high frequencies to facilitate the crossover to the tweeter.

ELAC FS 248 Black Edition Crystal midrange - MT 150 AS-XR midrange driver

 

Midbass Unit

TT 150 AS-XR black anodized diaphragm midbass used in: BS 243 BE, FS 247 BE and FS 248 BE.

The woofers drivers of the 240 BE series contain the new "Crystal Membrane" (patent pending) and their design is based on the well-known "Aluminium-Sandwich AS Technology" which was developed by ELAC a couple of years ago. The crystal-shaped inverse aluminium dome is joined to the paper cone in a special glueing process resulting the desired sandwich construction.

The stamping of the aluminium foil looks like the surface of a large crystal, this is where the term "Crystal Membrane" come from. This stamping stiffens the aluminium dome considerably which diminishes the membrane-internal resonances resulting in less sound coloration and additionally improves the large signal behaviour noticeably.

The voice coil is not only - like usually - joined to the neck of the paper cone but also to the bottom of the aluminium dome. This design results in the expansion of the transmission range of the respective woofers or midrange drivers by nearly an octave. Therefore the abbreviation "XR" (eXtended Range) has been introduced.

ELAC FS 247 Black Edition Crystal midbass - TT 150 AS-XR midbass driver

 
 
 
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