Triple Play Coax   Shelf speaker as in K+T 3/2024

Technical data
  • impedance: 3 Ohm
  • sensivity (2,83V/1m): 88 dB
  • size (HxWxD): 620 x 230 x 300 mm
  • frequency range (-8dB): 53 - 28000 Hz
  • crossover frequency(s): Hz
  • speaker type: bass reflex

Triple Play Coax is a three way compact speaker.

Triple Play Coax is a bass-reflex cabinet loudspeaker with drivers of Celestion and Monacor.

The kit is delivered with the following drivers:
- a Celestion TFX0615 coaxial driver
- two Monacor SPH-6M woofers

The loudspeaker has been developed by Frank Kuhl.

The crossover consists of:
- a 2nd order high-pass filter (12 dB per octave slope) for the tweeter.
- a band pass consisting of a 1st order high pass filter (6 dB per octave slope) and a 2nd order low-pass filter (12 dB per octave slope) for the mids-woofer.
- a 2nd order low-pass filter (12 dB per octave slope) for the woofer.

The frequency response of this speaker is nearly linear.

The decay spectrum is nearly perfect.

At low volume, i.e. 85 dB at 1 m, the nonlinear distortions are below 0,6% above 300 Hz and doesn't exceed 2% at 95 dB at 1 m between 300 and 15000 Hz.

An excerpt from the Klang+Ton review (Translation of the author into English)

Conclusion of the magazine Klang+Ton:

Our kit consists of

  • 2x SPH-6M
  • Celestion TFX0615
  • Bass reflex tube HP70, 70x220m, black
  • 0,5x PE sealing tape, 5x2 mm, 7.5 m
  • Foam N25-30, 100 x 50 cm, black
  • Binding Post PK31, gold plated (one pair, red and black)
  • 2m Speaker cable 2x1.5 mm2, transparent
  • 2x Pan screws 4x20 black, torx, 8 pieces
  • Plan for DIY kit

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

  • 2x Audaphon MKP CAP Superior 4.7 μF / 400 Vdc
  • Audaphon MKT CAP 2.7 μF / 160 Vdc
  • Audaphon MKT CAP 8.2 μF / 160 Vdc
  • 2x Audaphon MKT CAP 68 μF / 160 Vdc
  • Mundorf air core coil L140, 2.7 mH/0.51 Ohm
  • 1.0 mm air core coil, 0.39 mH/0.29 Ohm
  • 1.0 mm air core coil, 0.47 mH/0.32 Ohm
  • Metal-oxide resistor, 10W 3.3 Ohm (orange-orange-gold)
  • Metal-oxide resistor, 10W 4.7 Ohm (yellow-violet-gold)
  • Metal-oxide resistor, 10W 5.6 Ohm (green-blue-gold)
  • Metal-oxide resistor, 10W 10 Ohm (brown-black-black)

Kit without cabinet, price per speaker   EUR 389,00 excl. VAT: € 326.89 / $ 356.31

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 Celestion TFX0615 are of type polypropylen (MKP) Clarity-Cap CSA 250 V.

  • 2x ClarityCap PWA capacitor 68 μF / 160 Vdc
  • 2x ClarityCap CSA capacitor 4.7 μF / 250 Vdc
  • Audaphon MKP CAP Superior 2.7 μF / 400 Vdc
  • Audaphon MKP CAP Superior 8.2 μF / 400 Vdc
  • Mundorf baked varnish air core coil BL100, 0.39 mH/0.29 Ohm
  • Mundorf baked varnish air core coil BL100, 0.47 mH/0.32 Ohm
  • Mundorf baked varnish air core coil BL140, 2.7 mH/0.51 Ohm
  • Metal-oxide resistor, 10W 3.3 Ohm (orange-orange-gold)
  • Metal-oxide resistor, 10W 4.7 Ohm (yellow-violet-gold)
  • Metal-oxide resistor, 10W 5.6 Ohm (green-blue-gold)
  • Metal-oxide resistor, 10W 10 Ohm (brown-black-black)

Kit with high-end-crossover without cabinet, price per speaker   EUR 444,00 excl. VAT: € 373.11 / $ 406.69

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 8.2 μF / 160 Vdc
  • 0.7 mm air core coil, 0.33 mH/0.48 Ohm
  • ceramic resistor 6.8 Ohm/20 Watt

Price per impedance correction for one speaker, to be mounted on a small wooden board.     EUR 9,20 excl. VAT: € 7.73 / $ 8.43

universal PCB

If you prefer to mount the crossover components on a universal PCB instead on wood
PCB 220x155 mm, order no. I-8805002, price per unit:   EUR 11,80 excl. VAT: € 9.92 / $ 10.81
We recommend one board per kit (2 boards per speaker pair)


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