Includes: 4x D270Ph-S 1" Exit Phenolic Compression Driver Features:The latest addition to the TRIO By PRV 1” Exit phenolic family, the D270Ph-S is a new and improved compact driver that is all about high output and low distortion vocal reproduction all the way down to 500 Hz! This new driver is the perfect solution for use in high output PA and PRO audio on wheels systems.Highlights2″ phenolic diaphragm provides extreme clarity in the critical mid or vocal rangeNew and improved design based on our D250Ph-S Ideal driver for mid range and vocal reinforcementCompact driver size is perfect for conditions where space is a concernBrazilian Phenolic Technology Designed For Vocal Reproduction. High temperature copper wire is used for the voice coil that is wound on a Kapton former to withstand high operating temperatures. The old replacement diaphragm RPD250Ph still fits the D270Ph-S driver.The nearly indestructible phenolic diaphragm, that can play down to 500 Hz, ( RPD270Ph ) is built to resist the elements, making it perfect for outdoor use.Compact driver design for easy front mount installation. Based on the design of our D250Ph-S this more compact driver was created to supply the demand in the market. The small diameter of the driver allows for front mounting, making it easy to install without having to detach the driver from the horn.Comparison with old D250Ph-s with the new D270Ph-S improved performance.Designed to reproduce the all-important vocal range with authority! This mid range compression driver and horn is a great choice for high power public address (PA) Systems small venues and gymnasiums. Car audio SPL enthusiasts use this combo for vocal reinforcement on 3 way systems.GENERAL SPECIFICATIONSExit Throat Diameter1″ (25.4 mm)Nominal impedance8 OhmsRated AES Power Handling (RMS)75 WattsProgram Power150 WattsSensitivity 2.00V at 1m107.5 dBRecommended Hi Pass Crossover** **For Full Power Handling500 Hz** **12db Per Octave CrossoverFrequency Response at -10dB400 – 8,000 HzVoice Coil Diameter2″ (50 mm)Voice Coil WireCopperVoice Coil Former MaterialKaptonDiaphragm MaterialPhenolic resinFlux Density1.10 TMagnet MaterialFerrite EXTRA INFOOverall Diameter4.01″ (102 mm)Front Mount Baffle Cutout2.55″ (65 mm)Mounting Thread1 3/8″ 18 TPINet Weight2.64 Lbs (1.20 kg)Shipping Weight2.80 Lbs (1.27 kg)Carton Dimensions W x L x H4.21″ x 4.21″ x 2.83″ (107 x 107 x 72 mm)