Audaphon Big Block 3.0 floorstanding speakers from Hobby Hifi 5/2020

Kit without housing, price per speaker

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Big Block 3.0 is a three-way floor-standing loudspeaker with a very smooth frequency response and exemplary decay behavior. Big Block 3.0 is a high-quality loudspeaker with chassis from Audaphon and Wavecor, in which passive membranes are used for bass tuning. The loudspeaker contains the following chassis: - an air motion transformer (ribbon tweeter) Audaphon AMT 1i - a midrange speaker Wavecor WF182CU13 - a woofer Wavecor SW223BD02 and - a passive membrane PR223BD02 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 3rd order low pass (18 dB / octave) for the mid-woofer. - a 2nd order low-pass filter (12 dB / octave) for the woofer. The frequency response of the speaker is perfectly linear. The decay spectrum (waterfall diagram) is exemplary without any disturbing resonance. The non-linear distortions at medium volumes (90 dB, 1m) are below 0.32% above 100 Hz.

Technical data:

• Impedance: 4 Ohm
• Sound pressure level (2.83V/1m): 80 dB
• Dimensions (HxWxD): 1000 x 250 x 336 mm
• Frequency range (-8dB): 23 - 30000 Hz
• Crossover frequency(s): 180, 2000 Hz
• Principle: Passive membrane

Highlights

• Audaphon AMT-1i Wavecor WF182CU13, 8 Ohm, paper, BD, phase plug
• Wavecor SW223BD02, 4 Ohm, subwoofer with cast basket
• Wavecor PR223BD02, passive membrane with cast basket
• 2x insulation fleece MT Bondum 800 (30 x 50 x 2 cm)
• 0.5x insulation material Sonofil 100 x 35 cm for 20 liters
• Pole terminals PK28 I, one pair, gold-plated, red+black
• 3m speaker cable 2x2.5 mm2, transparent
• 1.5x Allen wood screws 5x30mm, black 8 pieces
• Allen wood screws 4x25 mm, black 8 pieces
• Construction plan for the kit the crossover components (right), to be assembled on a wooden board.
• Audaphon MKP CAP Superior 1.0 μF; / 400 Vdc
• Audaphon MKP CAP Superior 3.3 μF; / 400 Vdc
• Audaphon MKP CAP Superior 6.8 μF; / 400 Vdc
• IT electrolytic capacitor rough 1000 μF; / 63V
• JB Elko bipolar, 220 uF/50 Vdc
• Mundorf Elko smooth, 100μF / 50 Vdc
• Mundorf baked varnish air coil BL71, 3.3 mH/1.75 Ohm
• Mundorf baked varnish air coil BL71, 18 mH/4.66 Ohm
• Mundorf baked varnish air coil BL100, 0.68 mH/0.39 Ohm
• Mundorf baked varnish air coil BL100, 0.82 mH/0.45 Ohm
• Mundorf baked varnish air coil BL100, 2.2 mH/0.83 Ohm
• Mundorf BS125 core coil 6.8mH/0.37 Ohm
• Metal oxide resistor MOX10 2.7 Ohm (red-violet-gold)
• 2x metal oxide resistor MOX10 3.3 Ohm (orange-orange-gold)
• Metal oxide resistor MOX10 8.2 Ohm (grey-red-gold)
• Metal oxide resistor MOX10 10 Ohm (brown-black-black)