GPA (Great Plains Audio) is a manufacturer that has taken over ALTEC's production facilities and is currently carrying out maintenance etc. of ALTEC units. GPA 515-8C made to imitate ALTEC's 515! The magnet is also quite sturdy, making it feel like Alnico. I think the sound trend is relatively close, but the mid range is also clear. The exterior is dull and there is a feeling of use (Katsutsugu Hiura)
Maintenance information:2023.3.23 sound output confirmed
Accessories: none
Main specifications: 38cm impedance 8Ω playback frequency band 20-1kHz 150W