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The Alpair 7 Gen. 3 represents a large step forward in the design and production of “extended” full-range audio drivers. In its size class, this Alpair 7 currently delivers the widest frequency range*. Theusable range now extents to 32-kHz above 80dB, thatʼs higher than many tweeters
This Alpair 7 has an advanced damping systems such that it delivers a “near flat” response across itsrange. The 7 employs a rear ring-clamped suspension system and a new torque loaded rearsuspension (spider). Both these components add pre-tension to the power-train. The result is improvedlinearity and damping on the moving components.
The rear magnet cover can be removed. The covers magnetic attraction keeps it attached to the maindriver body. Simply pull away from the driverʼs main body, no tools are needed to do this job. Removalhelp those box makers who design shallow cabinets or wish to optimise internal box volumes. Theperformance change with the cover removed is small, so the installation choices for the end user isoptimal. The frameʼs front cover is also made removable. While we recommend its use, the frameʼsdiameter is minimised to 130-mm, helping box those who want to make slimmer box designs.
The acoustic performance of this driver is solidly placed in the “purist-audiophile” category. Its cone andpower-train are the most micro-resonance sensitive made by Markaudio to date. With the rear and frontcovers attached, the driver has a SPL of near 86dB while retaining an X-max of +4-mm available forpeak non-rhythmic bass loads. In a optimised box design, the system can be made capable ofoperating from 40-Hz to 32-kHz, possibly a unique performance for a simple cone driver in its size andclass. The off axis responses and central stereo image emitted from this Alpair 7 are possibly best inclass. Its cone profile and under-hung front suspension allow for a clean wide acoustic image making iteasier to optimse box positioning in most listening environments.
The Alpair 7 Gen. 3 is near unique (if not totally unique). Its range, near flat response and specialdesign features set it apart from other full-range driver of similar size.
Alpair 7 Gen. 3Data (with cover)REVC 5.4 OhmFo 70.90 HzSd 5.02 K mm/2Vas 4.58 LtrsCms 1.27 uM/NMmd 3.74 gMms 3.95 gBL 3.83 T*MQms 3.07Qes 0.65Qts 0.54Levc 21.30 uHNo 0.24%Spl 85.80 dB (with rear cover)85.20 dB (rear cover removed)Pwr 20w Nom.X max 4.2 mm 1 wayCoil Dia 20-mmMain tolerance +/- 1.5 Hz on mean Fo
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