4" COMPETITION COMPRESSION DRIVER - These are the epitome of competition-quality compression drivers. Titanium diaphragm, mylar capacitor crossover, and an aluminum horn included make these the best drivers available. PEAK POWER HANDLING - At 800W Max and 400W RMS the PRO-DKH4 titanium compression (horn) driver boasts out-of-this-world power handling for a Pro audio sound you will love. HIGH-QUALITY MAGNETS - Settle for nothing but the best with a 98 oz Ferrite magnet that produces a wider range of tones and can handle tremendous power at high volumes. HORN INCLUDED - DS18 has gone to great lengths to make sure this is compression driver has everything you would need by including an aluminum horn with these PRO line drivers DURABLE & LONG LASTING PERFORMANCE - this compression driver doesn’t draw an excessive amount of power from your amplifier & ensures long-lasting performance from your equipment.