Visaton Audimax -TL 28.3 floorstanding loudspeaker from Hobby Hifi 5/2018

Kit without housing price per box

Audimax-TL 28.3 is a three-way floor-standing loudspeaker. Audimax-TL 28.3 is a transmission line loudspeaker with chassis from SB Acoustics, SEAS and Visaton. Our kit contains the following loudspeakers: - a tweeter SB Acoustics TW29BN - a midrange Hobby-HiFi woofer 18MW12T (produced by SEAS) - a woofer Visaton TIW 250 XS 8 Ohm The loudspeaker was developed by Bernd Timmermanns. The crossover consists of: - a 3rd order high pass (18 dB / octave) for the tweeter. - a band pass consisting of a 2nd order high pass (12 dB / octave) and a 2nd order low pass (12 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 remain almost consistently below 0.4% at 90 dB (1m) above 100 Hz.

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Technical data:

• Impedance: 4 Ohm
• Sound pressure level (2.83V/1m): 85 dB
• Dimensions (HxWxD): 1150 x 318 x 420 mm
• Frequency range (-8dB): 28 - 40000 Hz
• Crossover frequency(s): 200, 1900 Hz
• Principle: Transmission line box

Highlights

• SB Acoustics tweeter SATORI-TW29BN, beryllium, neodymium
• Hobby-HiFi woofer 18MW12T (produced by SEAS)
• Visaton woofer TIW 250 XS, 8 Ohm
• 2.5x insulation fleece MT Bondum 800 (30 x 50 x 2 cm)
• 0.5x PE foam sealing strip, 5x2 mm, roll 7.5 m
• 1.5x insulation material Sonofil 100 x 35 cm for 20 liters
• Audaphon Damping 10, 970 x 470 mm, self-adhesive
• Pole terminals PK31, one pair, gold-plated, red+black 4m speaker cable 2x2.5 mm2, transparent
• 1.5x pan screws 4x20 black, Phillips, 8 pieces
• Allen wood screws 5x30mm, black 8 Piece
• Construction plan for the kit the crossover components (right), to be built on a wooden board.
• Mundorf MCAP EVO oil 3.3 μF / 450 V
• Mundorf MCAP EVO oil 8.2 μF / 450 V
• ClarityCap PWA capacitor 6.8 μF / 160 Vdc
• ClarityCap PWA capacitor 47 μF / 160 Vdc
• ClarityCap PWA capacitor 68 μF / 160 Vdc
• Audaphon MKP CAP Superior 2.2 μF / 400 Vdc
• Mundorf Elko rough, 560 μF/63 Vdc
• Mundorf Elko smooth, 100μF / 50 Vdc
• Mundorf air coil L140, 2.2 mH/0.46 Ohm
• 1.0 mm air coil, 0.68 mH/0.39 Ohm
• 0.7 mm air coil, 0.39 mH/0.49 Ohm
• 0.7 mm air coil, 6.8 mH/2.68 Ohm
• 0.7 mm air coil, 15 mH/4.45 Ohm
• Mundorf BS140 core coil 8.2 mH/0.33 Ohm
• Metal oxide resistor MOX10 3.3 Ohm (orange-orange-gold)
• Metal oxide resistor MOX10 8.2 Ohm (gray-red-gold)
• Metal oxide resistor MOX5 1.0 Ohm (brown-black-gold)