We apply the same legendary engineering that makes the JBL® brand a favorite of the professional music industry tothe JBL Loft Series home theater speakers. The most compact and affordable of the speakers in this series are theJBL Loft 30 bookshelf loudspeakers. Each speaker has a 100-millimeter (4-inch) PolyPlas™ low-frequency driver thatdelivers tight, extended bass, plus a soft-dome high-frequency transducer that produces natural sound with superiorclarity. The tweeter also integrates an Elliptical Oblate Spheroidal™ (EOS) waveguide so that sound quality is consistentover a wide listening area. The JBL Loft 30 speakers are voice-matched with all the other speakers in the Loft Series,making it easy to construct the sound system that fits your space and budget. Also, the Straight-Line Signal Path™crossover network built into all the Loft Series speakers creates smooth, even speaker-to-speaker sound movement.Two-way 100mm (4") bookshelf loudspeaker with soft-dome high-frequencytransducer on EOS waveguideJBL® LOFT 30TECHNICAL SPECIFICATIONSLow-frequency transducer: 100mm (4") PolyPlas coneHigh-frequency transducer: 25mm (1") soft dome on EOS waveguidePower handling: 10 – 100 wattsFrequency response: 70Hz – 20kHzNominal impedance: 8 ohmsSensitivity (2.83V/1m): 89dBEnclosure type: PortedConnector type: Binding postDimensions (H x W x D): 210mm x 130mm x 175mm (8-1/4" x 5-1/8" x 7")Weight: 1.9kg (4.3 lb) each