Excel Orkla floorstanding speakers from K+T 4/2021

Kit without housing price per speaker

Orkla is a three-way floorstanding loudspeaker. Orkla is a bass reflex loudspeaker with chassis from SB Acoustics, Seas and Alcone. The loudspeaker contains the following chassis: - a beryllium tweeter SB Acoustics SATORI-TW29B - a midrange speaker Seas Excel W18EX001 - a woofer Alcone AC10 HE The crossover consists of: - a 2nd order high pass (12 dB / octave) for the tweeter. - a band pass consisting of a 2nd order high pass (12 dB / octave) and a 3rd order low pass (18 dB / octave) for the mid-woofer. - a 2nd order low pass (12 dB / octave) for the woofer. The frequency response of the loudspeaker is perfectly linear. The decay spectrum (waterfall diagram) is exemplary without any disturbing resonance. The non-linear distortions at low volumes (85 dB, 1 m) are below 0.2% above 500 Hz (that's excellent!) and remain below 0.5% in the audible range even at higher levels (95 dB, 1 m).

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Technical data:

• Impedance: 4 Ohm
• Sound pressure level (2.83V/1m): 87 dB
• Dimensions (HxWxD): 1000 x 220 x 350 mm
• Frequency range (-8dB): 30 - 40000 Hz
• Crossover frequency(s): 120, 1750 Hz
• Principle: bass reflex box

Highlights

• Seas Excel W18EX001 (E0017-08S)
• SB Acoustics tweeter SATORI-TW29B, beryllium
• Alcone 25 cm loudspeaker AC10 HE, aluminum membrane
• Bass reflex tube HP70 XL, 70x220 mm, black
• Insulating fleece MT Bondum 800 (30 x 50 x 2 cm)
• 0.5x PE foam sealing strip, 5x2 mm, roll 7.5 m
• Insulating material Sonofil 100 x 35 cm for 20 liters
• Pole terminals PK28 I, one pair, gold-plated, red+black
• 3m speaker cable 2x1.5 mm2 black/red
• 1.5x Pan screws 4x20 black, Torx, 8 pieces
• Allen wood screws 5x30mm, black 8 pieces
• Construction plan for the kit the crossover components (right), to be assembled on a wooden board.
• Audaphon MKP CAP Superior 2.2 μF / 400 Vdc
• Audaphon MKP CAP Superior 10 μF / 400 Vdc
• Audaphon MKT capacitor 2.2 μF / 160 Vdc
• Audaphon MKT capacitor 10 μF / 160 Vdc
• 2x JB Elko bipolar, 220 μF/50 Vdc
• Mundorf Elko smooth, 68μF / 50 Vdc
• Mundorf Elko smooth, 82μF / 50 Vdc
• 1.0 mm air coil, 0.33 mH/0.26 Ohm
• 1.4 mm air coil, 1.8 mH/0.41 Ohm
• 0.7 mm air coil, 0.33 mH/0.48 Ohm
• 0.7 mm air coil, 0.47 mH/0.50 Ohm
• Mundorf BS125 core coil 12 mH/0.51 Ohm
• Mundorf H core coil H71, 4.7 mH/0.46 0hm
• Mundorf H core coil H71, 33 mH/1.93 0hm
• Ceramic resistor 1.5 Ohm/20 Watt
• Ceramic resistor 5.6 Ohm/20 Watt
• Metal oxide resistor MOX10 2.2 Ohm (red-red-gold)
• Metal oxide resistor MOX10 3.3 Ohm (orange-orange-gold)
• Metal oxide resistor MOX10 6.8 Ohm (blue-gray-gold)