Vintage Electro-Voice DH1A Hi Frequency Reproducer Driver 1990s USA#15933Good Condition. General Scratches, Scuffs and Wear (See Pics)Fully tested b y our technician works great Features3 Voice Coil2 Throat DiameterSpecifications: Power Frequency Response: 500-20,000 Hz (essentially flat 500-5,000Hz with 6-dB-per-octave roll off to 20,000 Hz, rapid roll off beyond)Nominal Impedance 8 ohm (6 Ohm Min) Tested at 4.1 to 4.5 Normal Range10.5 ohms Long-Term Average Power Capacity on HP Horns,Indicated Bands of Pink-Noise, 8 Ohm ImpedanceVoice Coil Construction: Rectangular edge-wound pure aluminum wire on a high-temperature polyimide form. Diaphragm Construction: Integral all-titanium construction consisting of spherical diaphragm dome and geometrically optimized suspension; a low fatigue, high temperature, long-duration-cure engineering polymer bonds the coil form to the diaphragm. Electrical Connection: Screw terminals, each of which will accept a pair of 12-gauge wires and any smaller size. Polarity: A positive voltage applied to the positive (+) terminal produces a positive acoustic pressure in the throat.9 DiameterWeight 22lb 12.9 oz Thanks For Looking3 Convenient Pickup Locations Gordon LaSalle Music339 Main StSouthbridge, MA 01550 Gordon LaSalle Music993 Main StEast Hartford, CT 06108 Gordon LaSalle Music Water Tower PlLeominster, MA 01453(Leominster Pickup By Appointment Only Please Contact For Details) We Accept Trades And OffersWe repair electronics as well (Message For Details)