NeXT-Monitor   Shelf speaker as in K+T 1/2018

Technical data
  • impedance: 4 Ohm
  • sensivity (2,83V/1m): 85 dB
  • size (HxWxD): 350 x 198 x 299 mm
  • frequency range (-8dB): 32 - 40000 Hz
  • crossover frequency(s): Hz
  • speaker type: passive radiator

NeXT-Monitor is a two way compact speaker, winning the IGDH-Contest 2017.

NeXT-Monitor is a loudspeaker with drivers of Seas . A Passive radiator provides deep bass.

The kit is delivered with the following drivers:
- a Seas 27TBCD/GB-DXT tweeter
- a Seas L16RNX/4 woofer

The loudspeaker has been developed by Alexander Wein.

The crossover consists of:
- a 2nd order high-pass filter (12 dB per octave slope) for the tweeter.
- a 3rd order low-pass filter (18 dB per octave slope) for the woofer.

The frequency response of this speaker is perfectly linear.

The decay spectrum is perfect.

At low volume, i.e. 85 dB at 1 m, the nonlinear distortions are below 0.3% above 300 Hz and doesn't exceed 0.5% at 95 dB at 1 m between 500 Hz and 10000 Hz. That is quite splendid.

Our kit consists of

  • Seas 27TBCD/GB-DXT (H1499-06)
  • Seas L16RNX-04 (H1488-04)
  • Seas passive radiator SP18 R (H9944)
  • 0.5x PE sealing tape, 5x2 mm, 7.5 m
  • Damping Sonofil 100 x 35 cm for 20 litres
  • Terminal T105 Au, with brass, gold plated
  • 2m Speaker cable 2x1.5 mm2, transparent
  • 0.5x Pan screws 3.5x17 black, 8 pieces
  • 2x Pan screws 4x20 black, 8 pieces
  • Plan for DIY kit

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

  • Audaphon MKP CAP Superior 0.68 μF / 400 Vdc
  • Audaphon MKP CAP Superior 2.7 μF / 400 Vdc
  • Audaphon MKP CAP Superior 8.2 μF / 400 Vdc
  • Audaphon MKT CAP 33 μF / 160 Vdc
  • 1.0 mm air core coil, 0.12 mH/0.15 Ohm
  • 0.7 mm air core coil, 0.18 mH/0.36 Ohm
  • 0.7 mm air core coil, 0.68 mH/0.70 Ohm
  • Audaphon M core coil M12, 1.5 mH/0.16 0hm
  • Metal-oxide resistor, 10W 1.5 Ohm (brown-green-gold)
  • Metal-oxide resistor, 10W 6.8 Ohm (blue-grey-gold)
  • Metal-oxide resistor, 10W 33 Ohm (orange-orange-black)

Kit without cabinet, price per speaker   EUR 439,00 excl. VAT: € 368.91 / $ 402.11

Kit with high-end crossover

The high-end kit is delivered with baked varnish air core 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 fullrange driver are of type polypropylen (MKP) Clarity-Cap PWA 160, ESA 630 and CSA (highest quality).

Kit with high-end-crossover without cabinet, price per speaker   EUR 509,00 excl. VAT: € 427.73 / $ 466.23

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).


Price per impedance correction for one speaker, to be mounted on a small wooden board.     EUR 15,20 excl. VAT: € 12.77 / $ 13.92

universal PCB

If you prefer to mount the crossover components on a universal PCB instead on wood
PCB 150x115 mm, tin plated, price per unit:   EUR 4,70 excl. VAT: € 3.95 / $ 4.31
We recommend one board per kit (2 boards per speaker pair)


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