The Royal 400

About the The Royal 400

The Electro-Voice The Royal 400 is a 3-way low-resonance ultra-compact loudspeaker system constructed with fine hardwood veneers and heavy vibration-free 3/4" panels for unusual rigidity. It features an 18" woofer (model 18WS), an 8" extended range midrange driver, and a T35 compression horn tweeter. The system is bi-ampable and designed to provide exceptionally wide frequency response from 30 Hz to 20,000 Hz. Power handling is rated at 30 watts maximum from 30-2500 Hz and 5 watts maximum from 2500-20,000 Hz, with a maximum undistorted output from a 70 watt amplifier on complex program signals. The cabinet dimensions are approximately 32" tall, 22" wide, and 15" deep. The crossover network uses L-pads for level adjustment, and the woofer has an 8 ohm nominal impedance with a 4 lb 10 oz ceramic magnet. The speaker system was highly regarded in the 1960s for its sound quality and is suitable for large rooms and tube amplifier systems.