2 For Sale - These drivers are mounted within an enclosure designed by BG. The driver element is mounted in an extruded aluminum housing with a PVC outer shell. The unit can be used as-is or remove the PVC ‘enclosure’ and mount the driver in-wall for home theatre application or remove the raw driver from the housing for your own design. The pic shows the notch filter that is recommended for these units. These drivers have had virtually no use and have remained in a canvass storage bag for years. They are heavy so I would prefer a pick up in Davis California (just west of Sacramento). Here’s some manufacturer info:
Bohlender Graebener RD50 Planar Transducer
The RD series of loudspeaker drivers offer the systems designer the advantages of a thin-film, line-source transducer with very high-performance potential for fixed installation sound reproduction. Unlike most exotic driver types, the RD series models feature unmatched bandwidth, power handling and ruggedness, as well as the ease of an almost entirely resistive load to the amplifier. The RD Series feature linear, push-pull Ceramic 8 motors linearly driving a polyester diaphragm whose moving mass is actually less than the air load. The bandwidth of the RD Series drivers is extraordinarily large, and is usable from as low as 150Hz to beyond audibility. Program power handling of the RD50 driver is 150 watts. The diaphragm is protected within a chassis made of three layers of heavy gauge, self-reinforced steel.
Specifications: • Power handling: 70 watts RMS/270 watts max • Nominal impedance: 4 ohms • Re: 4.0 ohms • Frequency range: 150-18,500 Hz • SPL: 88 dB 1W/1m • Net weight: 25.2 lbs. • Dimensions: 51-1/2" L x 4-11/16" W x 1-1/2" D.
$800 for the pair
Bohlender Graebener RD50 Planar Transducer
The RD series of loudspeaker drivers offer the systems designer the advantages of a thin-film, line-source transducer with very high-performance potential for fixed installation sound reproduction. Unlike most exotic driver types, the RD series models feature unmatched bandwidth, power handling and ruggedness, as well as the ease of an almost entirely resistive load to the amplifier. The RD Series feature linear, push-pull Ceramic 8 motors linearly driving a polyester diaphragm whose moving mass is actually less than the air load. The bandwidth of the RD Series drivers is extraordinarily large, and is usable from as low as 150Hz to beyond audibility. Program power handling of the RD50 driver is 150 watts. The diaphragm is protected within a chassis made of three layers of heavy gauge, self-reinforced steel.
Specifications: • Power handling: 70 watts RMS/270 watts max • Nominal impedance: 4 ohms • Re: 4.0 ohms • Frequency range: 150-18,500 Hz • SPL: 88 dB 1W/1m • Net weight: 25.2 lbs. • Dimensions: 51-1/2" L x 4-11/16" W x 1-1/2" D.
$800 for the pair
Attachments
Last edited: