July 25, 2017November 3, 2022 Altec Lansing VOTT from Sound Practices Magazine By Jeff Markwart Altec-Lansing / Voice of the Theatre / VOTT
July 25, 2017November 3, 2022 Altec Lansing Compression Driver Rear Loading Caps By Jeff Markwart Altec-Lansing / Compression Driver / Rear Loading Cap
July 25, 2017November 3, 2022 Altec-Lansing 604E Super Duplex By Jeff Markwart 604E Super Duplex / Altec-Lansing
July 25, 2017November 3, 2022 Great Plains Audio 604-8H-III By Jeff Markwart 604-8H III / Great Plains Audio / Review
July 24, 2017November 3, 2022 Recommended Parts – Substitutions – Construction Hints By Jeff Markwart Crossover
July 24, 2017November 3, 2022 Altec Lansing 604-8K Duplex Studio Monitor By Jeff Markwart 604-8K / Altec-Lansing / DUPLEX
July 24, 2017November 3, 2022 Phase Correction for Altec Ferrite Duplexes By Jeff Markwart 604 / Altec-Lansing / DUPLEX / Phase Correction
July 24, 2017November 3, 2022 Altec-Lansing 604-8H Crossover Revelations By Jeff Markwart 604-8H / Altec-Lansing / Great Plains Audio
July 21, 2017November 3, 2022 Altec-Lansing DUPLEX Speakers By GPA 604 / Altec-Lansing / Altec-Lansing 604 / DUPLEX