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Alcone Lagrange XT

We have been asked frequently for satellites and High-End loudspeakers with small cabinets. We started looking for components - regardless from which manufacturer - with the best possible price / performance ratio.

The idea came up to combine the AC 5.25 with the Vifa XT300 (later replaced by Scan Speak R2604/832000). We asked one of the best experts known to us - Mr Gerd Lommersum, to develop the kit.

The Alcone Lagrage XT is available in a satellite and floorstanding version.
  Lagrange XT
Scan Speak ring radiator R2604/832000
The Langrange XT features the following characteristics:


AC 5.25

Technical Data:

  • Frequency response: 50-35 000 Hz (-8dB)
  • Power handling (RMS/peak): 80 / 120 Watt
  • Crossover frequency: 2800 Hz
  • Sound pressure level at rated input: 82 dB (1W/1m)
  • Impedance: 8 Ohm
  • Size (HxWxD): 31,4 x 19 x 25 cm

The Alcone Lagrange XT (satellite version) contains:


  • 1 x ring radiator Scan Speak R2604/832000
  • 1 x bass / midrange AC 5.25 HE-S
  • 1 x terminal, bi-wiring
  • 1/2 bag damping material
  • 13 x screws 4 x 20 mm
  • 2 m cable 2x1,5 mm2 for internal wiring
  • Description and building instructions
  • 1 x crossover, to be mounted on wood,
        consisting of (to the right):
  • 1,8 mH core coil, 0.18 Ohm
  • 0,15 mH air-core coil, 0,7 mm
  • 0,33 mH air-core coil, 0,7 mm
  • 4,7 uF MKP capacitor
  • 8,2 uF MKP capacitor
  • 10 uF MKP capacitor
  • 4,7 uF MKT capacitor
  • ceramic resistor, 2,2 Ohm, 10W
  • 2 x resistor 8,2 Ohm, MOX4 (grey-red-gold)
  • resistor 33 Ohm, 5W

Building instructions for the Alcone Lagrange XT

Lagrange XT Satellite per unit (without cabinet):       EUR 187,00

Lagrange XT floorstanding version


The Lagrange XT 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 XT (floorstanding version) contains:

  • 1 x ring radiator Scan Speak R2604/832000
  • 1 x bass / midrange AC 5.25 HE-S
  • 1 x terminal, bi-wiring
  • 1/2 bag damping material
  • 13 x screws 4 x 20 mm
  • 2 m cable 2x1,5 mm2 for internal wiring
  • 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 cylinder core coil
  • 0,12 mH air-core coil, 0,7 mm
  • 0,22 mH air-core coil, 0,7 mm
  • 2 x 3,9 uF MKP capacitor
  • 6,8 uF MKP capacitor
  • 8,2 uF MKP capacitor
  • 10 uF MKP capacitor
  • ceramic resistor, 33 Ohm, 5W
  • resistor 4,7 Ohm, MOX4 (yellow-purple-gold)
  • resistor 10 Ohm, MOX4 (brown-black-brown)
  • resistor 33 Ohm, 5W

Price Lagrange XT (floorstanding version) per unit (without cabinet): EUR 188,00

Review of the standard Lagrange with AC 1 HAT, by "Klang+Ton", issue 1/99:
"At last there is a small, easy to manage floorstanding loudspeaker with excellent sound quality. The Langrange fills the gap brilliantly between a shelf speaker (13 cm bass) and a floorstanding speaker (17 cm bass) which has been neglected by almost all other manufacturers.

Alcone Lagrange Building Instructions
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