![](https://greatplainsaudio.com/wp-content/uploads/2017/07/Altec-Lansing-VOTTa-264x300.jpg)
Altec Lansing VOTT from Sound Practices Magazine
![](https://greatplainsaudio.com/wp-content/uploads/2017/07/902t-194x300.jpg)
Altec Lansing Compression Driver Rear Loading Caps
![](https://greatplainsaudio.com/wp-content/uploads/2017/07/n1500pnc-300x202.gif)
Altec-Lansing 604E Super Duplex
![GPA 604-8H-III-Rev-02](https://greatplainsaudio.com/wp-content/uploads/2016/06/604_8H_III_Rev_02-234x300.jpg)
Great Plains Audio 604-8H-III
![](https://greatplainsaudio.com/wp-content/uploads/2017/07/Crossover-components2-300x196.jpg)
Recommended Parts – Substitutions – Construction Hints
![Altec 604-8K](https://greatplainsaudio.com/wp-content/uploads/2017/07/Altec-604-8K-300x225.jpg)
Altec Lansing 604-8K Duplex Studio Monitor
![](https://greatplainsaudio.com/wp-content/uploads/2017/07/604-16xcontrols-287x300.gif)
Phase Correction for Altec Ferrite Duplexes
![](https://greatplainsaudio.com/wp-content/uploads/2017/07/604bxomfeq-300x233.jpg)
Altec-Lansing 604-8H Crossover Revelations
![Altec-Lansing 604B](https://greatplainsaudio.com/wp-content/uploads/2017/07/altec604b-300x300.jpg)
Phase Shift Between Drivers
![Original Altec-Lansing 604](https://greatplainsaudio.com/wp-content/uploads/2017/07/Original604-300x266.jpg)