J-Line   Floorstanding as in Hobby Hifi 4/2021

Technical data
  • impedance: 8 Ohm
  • sensivity (2,83V/1m): 84 dB
  • size (HxWxD): 960 x 200 x 356 mm
  • frequency range (-8dB): 30 - 22000 Hz
  • crossover frequency(s): Hz
  • speaker type: transmission line

J-Line is a floorstanding loudspeaker with a full range driver.

J-Line is a transmission-line loudspeaker with drivers of Esoteric Audio Devices .

The kit is delivered with a Esoteric Audio Devices E100HD MK2 full range driver

The loudspeaker has been developed by Bernd Timmermanns.

The crossover consists of:
- two blocking circuits in series with the full range driver.

The frequency response of this speaker is nearly linear.

The decay spectrum is perfect for a fullrange loudspeaker.

At medium volume, i.e. 90 dB at 1 m, the nonlinear distortions are below 0,4% above 200 Hz.

Our kit consists of

  • Esoteric Audio Devices E100HD MK2
  • 0,5x PE sealing tape, 5x2 mm, 7.5 m
  • Damping Sonofil 100 x 35 cm for 20 litres
  • 0,5x Audaphon Damping 10, 970 x 470 mm, adhesive
  • Binding Post PK31, gold plated (one pair, red and black)
  • 1,5m Speaker cable 2x2.5 mm2, transparent
  • 0,5x Pan screws 4x20 black, torx, 8 pieces
  • Plan for DIY kit

the crossover components (right),
to be mounted on a small wooden board.

  • Audaphon MKP CAP Superior 4.7 μF / 400 Vdc
  • Audaphon MKP CAP Superior 10 μF / 400 Vdc
  • Mundorf baked varnish air core coil BL140, 0.10 mH/0.07 Ohm
  • Mundorf baked varnish air core coil BL140, 1.5 mH/0.38 Ohm
  • 2x Metal-oxide resistor, 10W 8.2 Ohm (grey-red-gold)

Kit without cabinet, price per speaker   - not available

Kit with high-end crossover

The high-end kit is delivered with copper foild coils on important parts of the crossover for minimizing microphonic effects. - The current flow through the coil creates a magnetic field which sets the reel of wire in motion. This motion induces a voltage in the coil which adds itself to the signal. The stiffer the reel of wire is, the less the signal will be altered. The capacitors for the Esoteric Audio Devices E100HD MK2 are of type polypropylen (MKP) Mundorf EVO ÖL.

  • Mundorf Mcap Supreme EVO Oil 4,7 μF / 800V
  • Mundorf Mcap Supreme EVO Oil 10 μF / 800V
  • Mundorf copper foil coil CFC14-0.10 mH/0.06Ohm
  • Mundorf copper foil coil CFC14-1.5 mH/0.29Ohm
  • 2x MResist Supreme 8.2 Ohm / 20 Watt

Kit with high-end-crossover without cabinet, price per speaker   - not available

Impedance correction

If you want to use a valve amplifier with this speaker an impedance correction should be employed. In this case the component quality is less important; therefore, we offer only one kit (upon request higher quality components are available).

  • Audaphon MKT CAP 33 μF / 160 Vdc
  • ceramic resistor 15 Ohm/20 Watt

Price per impedance correction for one speaker, to be mounted on a small wooden board.     EUR 10,50 excl. VAT: € 8.82 / $ 9.44

universal PCB

If you prefer to mount the crossover components on a 159 x 127 mm universal PCB instead on wood:
Universal PCB RA160, order no.. str-RA160, price per unit:   EUR 5,90 excl. VAT: € 4.96 / $ 5.31
We recommend one board per kit (two boards for a speaker pair)

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