Philips 5" (128mm)* paper cone full range drivers with 2 3/16" (55mm) whizzer cone -- this is terminated with a flat ring which helps reduce whizzer resonances. 8 ohms (DCR=6.9 ohm). Voice Coil is 1" (25mm). It has the trademark octaganol 8-legged stamped basket. Drivers have cloth surrounds. I have brushed away the deteriorated open-cel foam that was used for a rear mount gasket.
*(across the mounting holes -- 4 3/4" (120mm) across the narrowest part of the octagan)
Numbers stamped on the back of the magnet the model number & 537 DD (probably a date code) and 2422 257 35502.
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Philips 5" (128mm)* 8 ohms (DCR=6.5 ohm) full range drivers with 2 3/16" (55mm) whizzer cone -- this is terminated with a flat ring which helps reduce whizzer resonances.They have a straight brown textured paper cone witha treated cloth acccordian surround, an estimated 3/4" (19mm) voice coil covered with a shallow paper dome. It has the trademark octaganol 8-legged stamped basket. They have a 3rd tag for grounding the basket.
*(across the mounting holes -- 4 3/4" (120mm) across the narrowest part of the octagan)
Numbers stamped on the back of the magnet are 16-66-AH (probably a date code dating them to 1966) and 242225735102.
6 1/8" (155mm) paper cone full range drivers with 2.5" (65mm) whizzer cone -- this is terminated with a flat ring which helps reduce whizzer resonances. 4 ohms (DCR=3.5 ohm). They have a textured paper cone extending into treated accordian surrounds, 1" (25mm) voice coil, and the trademark octaganol 8-legged stamped basket. they have a 3rd tag for grounding the basket. These have a can over the magnet.
Numbers stamped on the back of the magnet 2422 257 37102 & 68-02-AH (probably a date code -- made in 1968). They have the number 2088 embossed on the cone.
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Philips 6" (155mm) paper cone full range drivers with 2.5" (65mm) whizzer cone. 4 ohms (DCR=3.6 ohm). Voice Coil is 1" (25mm). It has the trademark octaganol 8-legged stamped basket. Drivers have accordian surrounds.
Numbers stamped on the back of the magnet the model number & 26-69 AH (probably a date code) and 2422 257 37102. Have the number 2088 embossed on the cone.
Others marked: 35 69 AH / 2422 257 37102 and 14 70 AH / 2422 257 37119.
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Philips 6 1/8" (155mm) paper cone full range drivers with 2.5" (65mm) whizzer cone -- this is terminated with a flat ring which helps reduce whizzer resonances. 8 ohms (DCR=7.3 ohm). They have a textured paper cone extending into treated accordian surrounds, 1" (25mm) voice coil, and the trademark octaganol 8-legged stamped basket. they have a 3rd tag for grounding the basket.
Numbers stamped on the back of the magnet 2422 257 37118 / AD 7060/M8 / 119-AH. They have the number 2088 embossed on the cone. Another numbers 22-70 AH / 2422 257 37118.
Efficiency about the same as my 91 dB references
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Philips 6" (155mm) paper cone full range drivers with 2.25" (60mm) whizzer cone. 4 ohms (DCR=3.5 ohm). Voice Coil is 3/4" (18mm). It has the trademark octaganol 8-legged stamped basket.
These came out of a pair of Sony portable reel-to-reel extension speakers.
Numbers stamped on the back of the magnet the model number & 6-61 AH, on the back of the cone 875/40 & 875/203.
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A pair of vintage Philips 6" (155mm) paper cone full range drivers with 2.25" (60mm) whizzer cone. 800 ohms (DCR=601 ohm). Voice Coil is 3/4" (18mm). It has the trademark octaganol 8-legged stamped basket.
Numbers stamped on the back of the magnet the model number & 18-60 AH3, on the back of the cone 8750/2132 & 8750/3132, and an A on the front of the cone.
800W EL84 OPTs
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8" (200mm) alnico full range 4 ohm speakers (DCR=3.5 ohm). They came out of a 1955 Philips console. They have an additional "surround" at the 2" mark, that allows the inner 2" to act as a HF radiator. They have a 6 legged stamped steel basket.
Number stamped on the back of the magnets 933C306-2.
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AD1055 10 1/4" (260mm) 8 ohm (6.8 ohm DCR) midbass speaker. It has a large alnico magnet structure, a paper cone with a 3/4" (19mm) wide rubber half-roll surround. They have an 8-legged stamped steel basket and an (est) 1 1/2" (38 mm) voice coil covered by a stiff plastic dust cap.
Number stamped on the magnet is 304 078 70261, AD1055/W8, 35 70 AH. The cone has 2094 embossed on it.
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