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The Austral full range speaker range is capable of high superlatives and with as flat a frequency response as possible.
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In order to achieve this aim, the Pro-12 subwoofer design has been modified from a bass reflex enclosure to a larger 103 litre tapered transmission line tunnel which wraps around a specially designed 5 speaker, 3 way vertical D’Appolito array for pinpoint voicing and accuracy.
The D’Appolito array consists of twin butyl rubber impregnated carbon fibre mid/woofers, twin silk dome midrange/tweeters, and a single ribbon super tweeter.
The dual chamber cabinet design takes the form of a truncated pyramid in order to eliminate internal standing waves and provide an aesthetically appealing form.
The Subwoofer chamber is a constant taper “C” shaped design, wrapping around the inner chamber, which is asymmetrical and has no parallel surfaces.
The ribbon tweeter is exactly at ear level from a seated position for perfect acoustic image centreing whilst the combination of cone and dome midranges provide excellent off axis response up to 35 degrees.
Both tuning ports exit at the top of the cabinet to provide bass reinforcement for the lower driver in the same vertical plane as the array. Initial testing confirms that the point source appears to emanate from a position approximately 300 mm in front of the tweeter making it impossible to localise the sound source to any particular driver.
The crossover circuit for the centre array is a three way 12dB per octave design incorporating separate filters for each driver. This design uses the finest German made Mundorf components exclusively, and is hard wired. High grade OFC wire is used throughout.
Austral has a raw frequency response of 25Hz to 35KHz +/-2.5dB, with 20Hz only a further 2dB down. With 1/3rd Octave smoothing applied the response becomes an incredibly linear 23Hz – 35KHz +/- 1.5dB making Austral one of the most accurate speaker systems available today.
Overall Specifications:
Frequency Response 23 Hz – 35 KHz +/- 1.5dB (on axis)
23 Hz – 30 KHz +/- 3 dB @ 35 degrees (of axis)
Sensitivity 89 dB for 1 watt/1 metre
Nominal Impedance 6 ohms to 7.6 ohms
Phase response +/- 60 degrees in the range 250Hz – 25KHz
Power rating 80 watts – 350 watts
Drivers 1×300 mm, 2×165 mm, 2×50 mm, 1x65mm ribbon
Warranty 10 years unconditional on drivers and cabinet, 3 years on Sub Module if fitted.
See www.aslanacoustics.com.au
