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Altec Lansing VOTT from Sound Practices Magazine
Altec Lansing Compression Driver Rear Loading Caps
Altec-Lansing 604E Super Duplex
Great Plains Audio 604-8H-III
Recommended Parts – Substitutions – Construction Hints
Altec Lansing 604-8K Duplex Studio Monitor
Phase Correction for Altec Ferrite Duplexes
Altec-Lansing 604-8H Crossover Revelations
Phase Shift Between Drivers
Altec-Lansing DUPLEX Speakers