Alcone Lagrange 98 - a High-End project

Lagrange 98

The goal was to incorporate all design know-how into the development of the Lagrange 98. This loudspeaker had to feature phase-correct sound radiation, absolute adherence to detail, a linear frequency response, outstanding cone outwards movement and the best available components. We chose the magnetically shielded version of the Scan-Speak D2904/9800 and for bass the Alcone AC 5.25, a driver with a rigid cone, yet a good cone outwards motion. The Seas Excel W15 CY 001 was also a contender, however, this driver doesn't allow a 6dB separation on the crossover due to the more pronounced resonance.

Considering the above mentioned characteristics the Lagrange 98 comes close to the ideal solution regarding development and lab results. Therefore the Langrange 98 is - besides the Angara 2 - one of the speakers most consequently developed towards High-End.

The Alcone Lagrange 98 is available as satellite or floorstanding version.
  Frequenzgang
right: frequency response of the Lagrange 98
 

The Lagrange 98 (sat) features the following characteristics: D2904/980007

- cones with ideal stiffness,
- the shows hardly any unwanted resonance
- accurate sound projection by correctly timed crossover
- ScanSpeak D2904/9800 a tweeter with high-end qualities
- an absolute flat frequency response (+/- 1 dB),
- only a small dip at 500 Hz, compensated by placing the speakers
  close to rear or side walls
- universal deployment, since D2904/9800 07 is magnetically shielded -
  picture of double magnet to the right.
AC 5.25

Technical Data:

  • Frequency response: 58-30 000 Hz (-8dB)
  • Power handling (RMS/peak): 60 / 80 Watt
  • Crossover frequency: 2200 Hz
  • SPL at rated input: 82 dB (1W/1m)
  • Impedance: 8 Ohm
  • Size (HxWxD): 31,4 x 19 x 25 cm

The Alcone Lagrange 98 (Satellite) Kit contains:


  • 1 x ScanSpeak D2904/9800 07 magnetically shielded
  • 1 x bass / midrange Alcone AC 5.25 HE-S
  • 1 x terminal, bi-wiring
  • 1/2 bag damping material (wool)
  • sealing tape
  • 13 x screws 4 x 20 mm
  • 2 m cable 2x1,5 mm2, silver coated
  • 2 boards Bitumex 2 mm for cabinet damping
  • Description and building instructions
  • 1 x crossover, to be mounted on wood,
        consisting of (to the right):
  • 1,8 mH air-core coil, 1,4 mm
  • 8,2 mH core coil
  • 2x 0,56 mH baked varnish coil, 1 mm
  • 2,7 mH, 1mm air-core coil
  • 0,05 mH, 0,7 mm air-core coil
  • 6,8 μF Mundorf MKP capacitor
  • 2x 1 μF Mundorf MKP capacitor
  • 1,5 μF Mundorf MKP capacitor
  • 2,2 μF Mundorf MKP capacitor
  • resistor 27 Ohm, MOX4 (red-purple-black)
  • 3x resistor 8,2 Ohm, MOX4 (grey-red-gold)
  • resistor 1,5 Ohm, MOX4 (brown-green-gold)
  • resistor 2,7 Ohm, MOX4 (red-purple-gold)

The Lagrange 98 (sat) building instructions

Lagrange 98 (sat) per unit without cabinet:       EUR 422,00 excl. VAT: € 354.62 / $ 429.09

Lagrange 98 floorstanding version

A floorstanding instead of a shelf speaker should be used when a low bass is required and a subwoofer is not available.

The Lagrange 98 (floorstanding) features the following characteristics:

Technical Data:

von unten To avoid unwanted intrinsic resonance the cabinet should internally be braced with two crossing boards, both positioned off-centre. Cabinet resonance is always unwanted, unlike with most musical instruments.

The combination of speaker drivers the construction design chosen results in a loudspeaker of exceptional price/performance ratio.

The Alcone Lagrange 98 (floorstanding) contains:

  • 1 x ScanSpeak D2904/9800 magnetically shielded
  • 1 x bass / midrange Alcone AC 5.25 HE-S
  • 1 x terminal, bi-wiring
  • 1/2 bag damping material (wool)
  • 13 x screws 4 x 20 mm
  • 2 m cable 2x1,5 mm2 silver coated
  • 4 boards Bitumex 2 mm for cabinet damping
  • 1 x bass reflex tube HP 50
  • Description and building instructions
  • 1 x crossover, to be mounted on wood,
        consisting of (to the right):
  • 1,8 mH air-core coil, 1,4 mm
  • 8,2 mH Ferritkernspule
  • 2x 0,56 mH baked varnish coil, 1 mm
  • 2,7 mH, 1mm air-core coil
  • 0,05 mH, 0,7 mm air-core coil
  • 6,8 μF Mundorf MKP capacitor
  • 2x 1 μF Mundorf MKP capacitor
  • 1,5 μF Mundorf MKP capacitor
  • 2,2 μF Mundorf MKP capacitor
  • Widerstand 27 Ohm, MOX4 (red-purple-black)
  • 3x Widerstand 8,2 Ohm, MOX4 (grey-red-gold)
  • Widerstand 1,5 Ohm, MOX4 (brown-green-gold)
  • Widerstand 2,7 Ohm, MOX4 (red-purple-gold)

price Lagrange 98 (floorstanding) per unit without cabinet: EUR 421,00 excl. VAT: € 353.78 / $ 428.08

The Alcone Lagrange 98 Building Instructions
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