Gatria   Floorstanding as in K+T 4/2019

Technical data
  • impedance: 4 Ohm
  • sensivity (2,83V/1m): 90 dB
  • size (HxWxD): 1177 x 250 x 323 mm
  • frequency range (-8dB): 33 - 40000 Hz
  • crossover frequency(s): 2000 Hz
  • speaker type: bass reflex
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Gatria is a two way floorstanding speaker.

Gatria is a bass-reflex cabinet loudspeaker with drivers of Scan Speak and Wavecor.

The kit is delivered with the following drivers:
- a Scan-Speak R2904-700005 tweeter
- two Wavecor WF182CU13 woofers

The loudspeaker has been developed by Dennis Frank and Daniel Gattig.

The crossover consists of:
- a 3rd order high-pass filter (18 dB per octave slope) with a trap curcuit in series for the tweeter.
- a 3rd order low-pass filter (18 dB per octave slope) for the woofer.

Additionally you can use a special high frequency notch filter. This filter reduce the volume around 18 KHz. We recommend this filter for very low damped rooms.

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 0,6% above 400 Hz and doesn't exceed 1,5% at 95 dB at 1 m between 300 and 15000 Hz.

Our kit consists of

  • ScanSpeak ring radiator R2904/7000-05
  • 2x WF182CU13, Wavecor Mid/Woofer, 8 Ohm, paper cone, BD, phase plug
  • Bass reflex tube HP100, 100x200 mm, black
  • 2x Damping fleece MT Bondum 800 (30 x 50 x 2 cm)
  • 2x Damping Sonofil 100 x 35 cm for 20 litres
  • Binding Post PK28 I, gold plated (one pair, red and black)
  • 3m Speaker cable 2x1.5 mm2 black/red
  • 2,5x Allen wood screws, black, 4x25 mm, 8 pieces
  • Plan for DIY kit

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

  • ClarityCap PWA capacitor 33 uF / 250 Vdc
  • ClarityCap PWA capacitor 6.8 uF / 400 Vdc
  • ClarityCap PWA capacitor 8.2 uF / 400 Vdc
  • Audaphon MKT CAP 22 uF / 160 Vdc
  • 1.0 mm air core coil, 0.15 mH/0.17 Ohm
  • 1.3 mm air core coil, 1.2 mH/0.35 Ohm
  • 0.7 mm air core coil, 0.12 mH/0.29 Ohm
  • 0.7 mm air core coil, 0.22 mH/0.39 Ohm
  • Metal-oxide resistor, 10W 4.7 Ohm (yellow-violet-gold)

Kit without cabinet, price per speaker   EUR 829,00 excl. VAT: € 696.64 / $ 780.24

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 Scan-Speak R2904-70005 are of type polypropylen (MKP) Clarity-Cap CSA 630 and 250 V.

Kit with high-end-crossover without cabinet, price per speaker   EUR 941,00 excl. VAT: € 790.76 / $ 885.65

Additionally high frequency notch filter

Kit without cabinet, price per unit   EUR 11,00 excl. VAT: € 9.24 / $ 10.35

Additionally high end high frequency notch filter

Kit without cabinet, price per unit   EUR 31,00 excl. VAT: € 26.05 / $ 29.18

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 14,00 excl. VAT: € 11.76 / $ 13.18

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 / $ 4.42
We recommend two boards per kit (4 boards per speaker pair)

Measurements

measurmentsMeasurements on this speaker

Pictures

PhotosPictures of this loudspeaker

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