Bohlender Graebener Radia 520 Ribbon Hybrid Speakers, mahogany base. Great condition and sound. Speakers have seen light usage. For pickup only unless buyer supplies OEM boxes and packing material. Latest version of this speakers are now list at $6000.
Bohlender-Graebener Radia 520 loudspeaker Specifications
Description: Two-way, floorstanding, sealed-box loudspeaker with line-source ribbon upper-frequency driver. Drive-units: 50" by 1.1" planar-magnetic coaxial midrange and HF ribbon; two 6.5" cone woofers. Crossover frequency: 350Hz. Crossover slopes: fourth-order, Linkwitz-Riley. Frequency response: 70Hz-20kHz, ±6dB. Sensitivity: 88dB/2.83V/m. Nominal impedance: 4 ohms. Recommended amplification: 50-250W continuous, 300W peak.
Dimensions: 70.25" (1800mm) H by 7.75" (200mm) W by 2.75" (70mm) D. Base: 13.25" (340mm) W by 17.25" (442mm) D. Weight: 59 lbs (26.8kg).
Finishes: Black anodized aluminum tower, black or mahogany base.