It is a ferrite model, a 20cm cone-shaped full-range speaker unit representing Altec. The response is good, and the light sound is pleasant. It has high efficiency and is compatible with vacuum tube amplifiers. The exterior has age dullness and small scratches. Serial 11267/11273 (Satoshi Yoneshima)
Maintenance information: 2022.9.15 sweep check OK
Accessories: none
Main specifications: 20cm cone type full range speaker frequency characteristics 70Hz to 11kHz minimum resonance frequency 80Hz impedance 8Ω rated input 12W output sound pressure level 102dB/W/m weight 1.4kg