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The Voxativ 9.87 System with AC-4D driver is a modular, semi-active two-way loudspeaker system consisting of a passive Pi Monitor mounted above an active Pi-Bass module. The upper enclosure uses Voxativ’s AC-4D high-efficiency full-range driver in a folded/back-loaded horn configuration, intended to reproduce the majority of the audible range without a conventional midrange or tweeter crossover. The lower module uses a dipolar RiPol-style bass enclosure with two opposing neodymium woofers and an integrated 250 W Class AB amplifier. The Pi-Bass includes adjustable crossover, gain/EQ and phase controls; the recommended crossover point is approximately 120 Hz. The AC-4D version was documented in contemporary product reviews and is still referenced by Voxativ dealer/product materials, although newer 9.88 configurations have subsequently been introduced. Published specifications vary by driver and configuration, so figures below should be treated as manufacturer/reviewer data for the AC-4D-equipped 9.87 rather than laboratory tolerances.
Driver and acoustic performance characteristics
Amplification power output and characteristics
Driver configuration and enclosure design
Input and output connections
Size, weight, and appearance
Specifications are community-contributed and may not be accurate or complete. Verify all details with the manufacturer before making purchasing decisions. Terms & Conditions
The closest alternatives on specs, description and the systems they turn up in, with the specs they share set side by side.
The EL150SL Active's power @ 8ω is 350W against the 9.87 System with AC-4D driver's 250W, its sensitivity 91 dB against 98 dB, its high-frequency extension 22 kHz against 20 kHz, and its low-frequency extension 25 Hz against 20 Hz.
The SCM50ASL's power @ 8ω is 200W against the 9.87 System with AC-4D driver's 250W, its sensitivity 112 dB against 98 dB, its high-frequency extension 25 kHz against 20 kHz, and its low-frequency extension 38 Hz against 20 Hz.
The Duo's power @ 8ω is 100W against the 9.87 System with AC-4D driver's 250W, its sensitivity 104 dB against 98 dB, and its low-frequency extension 30 Hz against 20 Hz. Both share high-frequency extension (20 kHz).
The SCM100ASLT's sensitivity is 115 dB against the 9.87 System with AC-4D driver's 98 dB, its high-frequency extension 22 kHz against 20 kHz, its low-frequency extension 32 Hz against 20 Hz, and its ways 3 against 2.
Vandersteen Audio Kento Carbon
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