Australian HIFI - - SOUNDBITES -

Def Tech (De­fin­i­tive Tech­nol­ogy) has re­leased the first three mod­els in its new De­mand Se­ries speak­ers, all of which fea­ture Def Tech’s new off­set tweeter de­sign and bass/midrange driv­ers that are fit­ted with wave­guides and dou­ble sur­rounds. All three new mod­els are two-driver, two-way de­signs. The small­est is the Def Tech D7, which mar­ries a 114mm bass/midrange driver with a 25mm alu­minium dome tweeter. A bass re­flex de­sign with a rear-fac­ing port, it is rated with a fre­quency re­sponse of 67Hz to 21kHz (–3dB) and a sensitivity of 85dBSPL. It re­tails for $995 per pair (RRP). The Def Tech D9 pairs a 133mm bass/midrange driver with a 25mm alu­minium dome tweeter. In­stead of a bass re­flex port, low bass re­sponse is aug­mented by a rear-mounted pas­sive ra­di­a­tor. ‘ In­te­grat­ing the pas­sive bass ra­di­a­tor pro­duces su­pe­rior low-end ex­ten­sion,’ says Si­mon Zanin of Ad­vance Au­dio. ‘ Plus the ad­di­tion of a larger spi­der re­duces rock­ing and in­creases lin­ear­ity for deep, tight, clean bass re­sponse.’ Def Tech specs the fre­quency re­sponse of the D9 at 64Hz to 22kHz (–3dB) and the sensitivity at 88dBSPL. Re­tail cost is $1,295 per pair (RRP).

The largest model in the Se­ries, the Def Tech D11, has the same bass ra­di­a­tor and tweeter as the D9, but is fit­ted with a 165mm di­am­e­ter bass/midrange driver. The fre­quency re­sponse claimed for it by Def Tech is 61Hz to 22kHz (–3dB) and the sensitivity 90dBSPL. It re­tails for $1,795 per pair (RRP). All mod­els have the tweeter off­set in the mount­ing plate by five de­grees. ‘ This off­set de­liv­ers a more pre­cise cen­tre stereo im­age by elim­i­nat­ing un­de­sir­able sym­met­ric dif­frac­tion off the cor­ners of the front baf­fle,’ says Zanin. ‘ All the bass/midrange driv­ers in the se­ries have a patented dou­ble sur­round (BDSS) that pro­vides greater ex­cur­sion and out­put that re­sults in su­pe­rior midrange de­tail and punchier bass com­pared to driv­ers of sim­i­lar size. They also have a patented lin­ear re­sponse wave­guide that ex­tends fre­quency re­sponse, both on-axis and off-axis, and im­proves dis­per­sion for more nat­u­ral midrange tim­bre and more pre­cise imag­ing.’ All mod­els in the Def Tech De­mand Se­ries have high-gloss black-painted cab­i­nets and baf­fles made from ex­truded alu­minium that’s been bead­blasted to en­sure a time­less look if you use the speaker with­out their black grilles. For fur­ther in­for­ma­tion, please con­tact Ad­vance Au­dio on (02) 9561 0799 or visit­vanceau­

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