Check the listing for details. PreSonus AIR XD 15 Powered Speaker. Condition: New. Listed at 699.99 USD. Massive Sound from a Compact Speaker Delivering massive sound from an astonishingly small footprint, the PreSonus AIR XD 15 houses a burly 15-inch woofer for tight, punchy lows and a 1.35-inch high-frequency compression driver for clear, detailed highs. This muscular powered PA speaker is driven by a 1,500-watt Class D power amplifier, yielding 134dB of clean, high-headroom output. Its integrated 3-channel mixer provides you with plenty of flexible connectivity. Meanwhile, a full-color LCD screen gives you easy access to speaker tuning, EQ, and system settings. Tailoring the AIR XD 15 to your specific application is incredibly straightforward using the optimized DSP presets, and you get adjustable Treble and Bass parameters for fine-tuning your overall sound.