*IF YOU ARE ONLY IN YHR MARKET FOR ONE, MESSAGE ME AND I CAN SPLIT THEM INTO TWO LISTINGS* Nice condition. No rips or tears Some dust from storage. The altec label came off the back of one of them. See pictures for condition. The 421-8LF is a 15-inch low-frequency loud- speaker designed specifically for sound rein- forcement and reproduction systems where high power-handling capacity must be com- bined with high sensitivity and linearity. The 421-8LF is built on a rigid 16-inch die-cast aluminum frame which is designed for either front or rear mounting. An efficient 4.87 pound ceramic magnet structure backs up a high- power voice coil of edge-wound copper ribbon. The voice coil is wound on an aluminum form for maximum strength and heat dissipation and then attached to a carefully-molded paper cone. The entire cone/voice coil assembly is mounted to the frame with a flexible yet linear surround and spider. Together, these components make up a loudspeaker that is efficient yet rugged, linear yet tolerant of large amounts of power. The 421-8LF has a continuous power rating of 100 watts and a frequency response from 35 to 8000 Hz. It is designed for high efficiency, high linearity, low distortion, and wide range. SPECIFICATIONS Type: Low-frequency loudspeaker Construction- Frame (Basket): Structurally reinforced die-cast aluminum Power Rating: 100 watts continuous pink noise band limited from 35 Hz-1000 Hz Cone: Molded fiber Frequency Response: 35 Hz-8000 Hz Pressure Sensitivity: 97 dB SPL with 1 watt input of band-limited pink noise from 250 Hz-1000 Hz measured on axis 4 feet from the cone. Equal to EIA rating of 50 dB SPL measured on axis 30 feet from cone with 1 milliwatt input. Nominal Impedance: 8 ohms Cone Suspension: High-compliance cloth surround with mechanical resistance Voice Coil: Edge-wound copper ribbon Voice Coil Support Material: Aluminum with Kapton insulation Maximum Cone Excursion: 1/2 Nominal Free-Air Cone Resonance: 35Hz Voice Coil Diameter: 3 (7.62 cm) Magnetic Assembly- Magnet Weight: 4.875 pounds Diameter: 16 (40.64 cm) Weight: 20 pounds, 11 ounces (9.40 kg) Mounting Data- Mounting Hole Diameter: 14 (35.87 cm) (may be either front or rear mounted) Mounting Bolt Centers: 8 holes equally spaced on 15% (38.41 cm) diameter circle. Note-Bolt circle can vary from 14% up to 15% Loudspeaker Depth: 64 (15.88 cm) Assembly Weight: 17.5 pounds Magnet Type: Ceramic Flux Density: 14,000 gauss