Audimax-TL 28.3 is a three way floorstanding speaker.
Audimax-TL 28.3 is a transmission-line loudspeaker with drivers of SB Acoustics, SEAS and Visaton.
The kit is delivered with the following drivers:
- a SB Acoustics TW29BN tweeter
- a Hobby-HiFi Tieftonlautsprecher 18MW12T (von SEAS produziert) mids driver
- a Visaton TIW 250 XS 8 Ohm woofer
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 2nd order low-pass filter (12 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 90 dB and 1 m, nonlinear distortions are below 0,4 % almost everywhere above 100 Hz.
the crossover components (right),
to be mounted on a small wooden board.
Kit without cabinet, price per speaker EUR 1226,29 excl. VAT: € 1057.15 / $ 1247.43
The high-end kit is delivered with foil coils and 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 tweeter are of type polypropylen (MKP) Mundorf Mcap Supreme EVO Öl mit 800 V.
Kit with high-end-crossover without cabinet, price per speaker EUR 1454,39 excl. VAT: € 1253.78 / $ 1479.47
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).
If you prefer to mount the crossover components on a 240 x 165 mm universal PCB instead on wood:
We recommend one board 240 x 165 mm and a half board 159 x 127 mm per kit (two boards 240 x 165 mm and one board 159 x 127 mm for a speaker pair)
Universal PCB RA240, order no.. I-2767, price per unit: EUR 7,41 excl. VAT: € 6.39 / $ 7.54
Universal PCB RA160, order no.. I-2766, price per unit: EUR 4,97 excl. VAT: € 4.28 / $ 5.06
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