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Altec full range 409-8D - $40 (Mesa)
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These were used for PA / background use via a transformer-based constant voltage system, but I have removed the speaker from the cabinet. I still have the transformers.
The cabinets have been donated.
$40 per speaker.
Google AI gives us this:
The Altec 409-8D is an 8-inch, vintage, full-range, dual concentric speaker with a nominal impedance of 8 ohms and an allowable input of 16W.
Key specifications include a resonant frequency (\(F_{s}\)) of 91 Hz, a voice coil diameter of 25mm, a sensitivity of 96 dB, and a frequency response of 50 Hz to 14 kHz.
Specifications Driver Type: 8-inch full-range, dual concentric
Nominal Impedance: 8 Ω
Allowable Input: 16W
Voice Coil Diameter: 25mm
Resonant Frequency (\(F_{s}\)): 91 Hz
Output Sound Pressure Level: 96 dB
Frequency Response: 50 Hz to 14 kHz
Cone Voice Coil Diameter: 1.00″ (25.4mm)
Cone Outer Diameter (OD): 8″ (203.2mm)
Cone Depth: 1.450″ (36.830mm)
Weight: 1.3 kg
Contact Don at: 602-four three zero 0175