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The APBX 8 DS loaded enclosure provides the highest performance/ size ratio. For this purpose an 8.5 lt. sealed enclosure with a 4+4 Ω dual voice-coil configuration was adopted to exploit the full power of an AP5.9 bit (paralleling voice coils for a 2-ohm load) or with two pairs of AP8.9 bit bridged channels (one bridged pair of channels to each voice coil). The speaker’s high excursion capability allows the use of the proprietary BASS BOOST of AP bit amplifiers to make use of all the available power for rich and dynamic bass.
The APS 8 D subwoofer system is housed in an ultra-low profile, measuring just 5.16 inches (131 mm), sealed box for optimal performance. The innovative 2S² (2 Sides/2 Sounds) design offers flexibility, allowing users to choose between Down-Firing for enhanced low-frequency extension or Up-Firing for added punch and definition. The enclosure features leveling feet with velcro inserts for a secure grip on carpet, and rounded corners aid easy trunk positioning while minimizing enclosure resonance. The SSP (Sub Smart Plug) provides versatile impedance configuration with traditional push contacts and a Plug-&-Play terminal block for quick release. The 8-inch water-repellent pressed paper cone, designed using FEM simulation and Klippel Scan Vibrometer optimization, ensures a long linear excursion capability of 9 mm. The robust driver motor assembly, optimized with Finite Element Modeling, guarantees precise control even under high excursion conditions. Compatible with AP1 D mono or AP4.9 bit/AP4 D (2 CH bridged) amplifiers, the system leverages the built-in DSP's bass boost feature and integrated parametric equalizer. Complete protection is offered by the sturdy metal grid included with the subwoofer driver.

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