Big Block 3.0 is a three way floorstanding speaker with perfectly linear frequency response and exemplary waterfall diagram.
Big Block 3.0 is a loudspeaker with drivers of Audaphon and Wavecor. Passive radiators provide deep bass.
The kit is delivered with the following drivers:
- a Audaphon AMT 1i air motion transformer (ribbon-tweeter)
- a Wavecor WF182CU13 mids driver
- a Wavecor SW223BD02 woofer and
- a passive radiator PR223BD02
The loudspeaker has been developed by Bernd Timmermanns.
The crossover consists of:
- a 3rd order high-pass filter (18 dB per octave slope) for the tweeter.
- a band pass consisting of a 2nd order high pass filter (12 dB per octave slope) and a 3rd order low-pass filter (18 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 perfectly linear.
The decay spectrum as shown in the waterfall diagram is exemplary, free of any disturbing resonance.
At medium volume, i.e. 90 dB at 1 m, the nonlinear distortions are below 0,32% above 100 Hz.
the crossover components (right),
to be mounted on a small wooden board.
Kit without cabinet, price per speaker EUR 1581,00 excl. VAT: € 1328.57 / $ 1395.00
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 Audaphon AMT 1i are of type polypropylen (MKP) Mundorf Supreme EVO Öl 800V.
Kit with high-end-crossover without cabinet, price per speaker EUR 2087,00 excl. VAT: € 1753.78 / $ 1841.47
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 11,20 excl. VAT: € 9.41 / $ 9.88
For one speaker you need 1 pc. of RA140 and 1 pc. of RA240 pcb.
If you prefer to mount the crossover components on a 140 x 102 mm universal PCB instead on wood:
Universal PCB RA140, order no.. str-RA140, price per unit: EUR 4,20 excl. VAT: € 3.53 / $ 3.71
Universal PCB RA240, order no.. str-RA240, price per unit: EUR 8,60 excl. VAT: € 7.23 / $ 7.59
We recommend one board (each) per kit (two boards (each) for a speaker pair)
Hobby HiFi Overview